Update changelog.

[youtubedl] / youtube-dl

diff --git a/youtube-dl b/youtube-dl
index 3a37fae2eb19769886f897090dbd28e397ee3d21..e3eb8774caa258ddbaa51323938fbd36c4fc170d 100755 (executable)
--- a/youtube-dl
+++ b/youtube-dl
@@ -1,4055 +1,89 @@
 #!/usr/bin/env python
 #!/usr/bin/env python

-# -*- coding: utf-8 -*-

 
 

-__author__  = (
-       'Ricardo Garcia Gonzalez',
-       'Danny Colligan',
-       'Benjamin Johnson',
-       'Vasyl\' Vavrychuk',
-       'Witold Baryluk',
-       'Paweł Paprota',
-       'Gergely Imreh',
-       'Rogério Brito',
-       'Philipp Hagemeister',
-       'Sören Schulze',
-       )
-
-__license__ = 'Public Domain'
-__version__ = '2011.10.19'
-
-UPDATE_URL = 'https://raw.github.com/rg3/youtube-dl/master/youtube-dl'
-
-import cookielib
-import datetime
-import gzip
-import htmlentitydefs
-import HTMLParser
-import httplib
-import locale
-import math
-import netrc
-import os
-import os.path
-import re
-import socket
-import string
-import subprocess
-import sys
-import time
-import urllib
-import urllib2
-import warnings
-import zlib
-
-if os.name == 'nt':
-       import ctypes
+import sys, os
+import json, hashlib

 
 try:
 
 try:

-       import email.utils
-except ImportError: # Python 2.4
-       import email.Utils
-try:
-       import cStringIO as StringIO
-except ImportError:
-       import StringIO
-
-# parse_qs was moved from the cgi module to the urlparse module recently.
-try:
-       from urlparse import parse_qs
-except ImportError:
-       from cgi import parse_qs
+    import urllib.request as compat_urllib_request
+except ImportError: # Python 2
+    import urllib2 as compat_urllib_request
+
+def rsa_verify(message, signature, key):
+    from struct import pack
+    from hashlib import sha256
+    from sys import version_info
+    def b(x):
+        if version_info[0] == 2: return x
+        else: return x.encode('latin1')
+    assert(type(message) == type(b('')))
+    block_size = 0
+    n = key[0]
+    while n:
+        block_size += 1
+        n >>= 8
+    signature = pow(int(signature, 16), key[1], key[0])
+    raw_bytes = []
+    while signature:
+        raw_bytes.insert(0, pack("B", signature & 0xFF))
+        signature >>= 8
+    signature = (block_size - len(raw_bytes)) * b('\x00') + b('').join(raw_bytes)
+    if signature[0:2] != b('\x00\x01'): return False
+    signature = signature[2:]
+    if not b('\x00') in signature: return False
+    signature = signature[signature.index(b('\x00'))+1:]
+    if not signature.startswith(b('\x30\x31\x30\x0D\x06\x09\x60\x86\x48\x01\x65\x03\x04\x02\x01\x05\x00\x04\x20')): return False
+    signature = signature[19:]
+    if signature != sha256(message).digest(): return False
+    return True
+
+sys.stderr.write(u'Hi! We changed distribution method and now youtube-dl needs to update itself one more time.\n')
+sys.stderr.write(u'This will only happen once. Simply press enter to go on. Sorry for the trouble!\n')
+sys.stderr.write(u'From now on, get the binaries from http://rg3.github.io/youtube-dl/download.html, not from the git repository.\n\n')

 
 try:
 
 try:

-       import lxml.etree
-except ImportError:
-       pass # Handled below
+       raw_input()
+except NameError: # Python 3
+       input()

 
 

-try:
-       import xml.etree.ElementTree
-except ImportError: # Python<2.5: Not officially supported, but let it slip
-       warnings.warn('xml.etree.ElementTree support is missing. Consider upgrading to Python >= 2.5 if you get related errors.')
+filename = sys.argv[0]

 
 

-std_headers = {
-       'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64; rv:5.0.1) Gecko/20100101 Firefox/5.0.1',
-       'Accept-Charset': 'ISO-8859-1,utf-8;q=0.7,*;q=0.7',
-       'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
-       'Accept-Encoding': 'gzip, deflate',
-       'Accept-Language': 'en-us,en;q=0.5',
-}
+UPDATE_URL = "http://rg3.github.io/youtube-dl/update/"
+VERSION_URL = UPDATE_URL + 'LATEST_VERSION'
+JSON_URL = UPDATE_URL + 'versions.json'
+UPDATES_RSA_KEY = (0x9d60ee4d8f805312fdb15a62f87b95bd66177b91df176765d13514a0f1754bcd2057295c5b6f1d35daa6742c3ffc9a82d3e118861c207995a8031e151d863c9927e304576bc80692bc8e094896fcf11b66f3e29e04e3a71e9a11558558acea1840aec37fc396fb6b65dc81a1c4144e03bd1c011de62e3f1357b327d08426fe93, 65537)

 
 

-simple_title_chars = string.ascii_letters.decode('ascii') + string.digits.decode('ascii')
+if not os.access(filename, os.W_OK):
+    sys.exit('ERROR: no write permissions on %s' % filename)

 
 try:
 
 try:

-       import json
-except ImportError: # Python <2.6, use trivialjson (https://github.com/phihag/trivialjson):
-       import re
-       class json(object):
-               @staticmethod
-               def loads(s):
-                       s = s.decode('UTF-8')
-                       def raiseError(msg, i):
-                               raise ValueError(msg + ' at position ' + str(i) + ' of ' + repr(s) + ': ' + repr(s[i:]))
-                       def skipSpace(i, expectMore=True):
-                               while i < len(s) and s[i] in ' \t\r\n':
-                                       i += 1
-                               if expectMore:
-                                       if i >= len(s):
-                                               raiseError('Premature end', i)
-                               return i
-                       def decodeEscape(match):
-                               esc = match.group(1)
-                               _STATIC = {
-                                       '"': '"',
-                                       '\\': '\\',
-                                       '/': '/',
-                                       'b': unichr(0x8),
-                                       'f': unichr(0xc),
-                                       'n': '\n',
-                                       'r': '\r',
-                                       't': '\t',
-                               }
-                               if esc in _STATIC:
-                                       return _STATIC[esc]
-                               if esc[0] == 'u':
-                                       if len(esc) == 1+4:
-                                               return unichr(int(esc[1:5], 16))
-                                       if len(esc) == 5+6 and esc[5:7] == '\\u':
-                                               hi = int(esc[1:5], 16)
-                                               low = int(esc[7:11], 16)
-                                               return unichr((hi - 0xd800) * 0x400 + low - 0xdc00 + 0x10000)
-                               raise ValueError('Unknown escape ' + str(esc))
-                       def parseString(i):
-                               i += 1
-                               e = i
-                               while True:
-                                       e = s.index('"', e)
-                                       bslashes = 0
-                                       while s[e-bslashes-1] == '\\':
-                                               bslashes += 1
-                                       if bslashes % 2 == 1:
-                                               e += 1
-                                               continue
-                                       break
-                               rexp = re.compile(r'\\(u[dD][89aAbB][0-9a-fA-F]{2}\\u[0-9a-fA-F]{4}|u[0-9a-fA-F]{4}|.|$)')
-                               stri = rexp.sub(decodeEscape, s[i:e])
-                               return (e+1,stri)
-                       def parseObj(i):
-                               i += 1
-                               res = {}
-                               i = skipSpace(i)
-                               if s[i] == '}': # Empty dictionary
-                                       return (i+1,res)
-                               while True:
-                                       if s[i] != '"':
-                                               raiseError('Expected a string object key', i)
-                                       i,key = parseString(i)
-                                       i = skipSpace(i)
-                                       if i >= len(s) or s[i] != ':':
-                                               raiseError('Expected a colon', i)
-                                       i,val = parse(i+1)
-                                       res[key] = val
-                                       i = skipSpace(i)
-                                       if s[i] == '}':
-                                               return (i+1, res)
-                                       if s[i] != ',':
-                                               raiseError('Expected comma or closing curly brace', i)
-                                       i = skipSpace(i+1)
-                       def parseArray(i):
-                               res = []
-                               i = skipSpace(i+1)
-                               if s[i] == ']': # Empty array
-                                       return (i+1,res)
-                               while True:
-                                       i,val = parse(i)
-                                       res.append(val)
-                                       i = skipSpace(i) # Raise exception if premature end
-                                       if s[i] == ']':
-                                               return (i+1, res)
-                                       if s[i] != ',':
-                                               raiseError('Expected a comma or closing bracket', i)
-                                       i = skipSpace(i+1)
-                       def parseDiscrete(i):
-                               for k,v in {'true': True, 'false': False, 'null': None}.items():
-                                       if s.startswith(k, i):
-                                               return (i+len(k), v)
-                               raiseError('Not a boolean (or null)', i)
-                       def parseNumber(i):
-                               mobj = re.match('^(-?(0|[1-9][0-9]*)(\.[0-9]*)?([eE][+-]?[0-9]+)?)', s[i:])
-                               if mobj is None:
-                                       raiseError('Not a number', i)
-                               nums = mobj.group(1)
-                               if '.' in nums or 'e' in nums or 'E' in nums:
-                                       return (i+len(nums), float(nums))
-                               return (i+len(nums), int(nums))
-                       CHARMAP = {'{': parseObj, '[': parseArray, '"': parseString, 't': parseDiscrete, 'f': parseDiscrete, 'n': parseDiscrete}
-                       def parse(i):
-                               i = skipSpace(i)
-                               i,res = CHARMAP.get(s[i], parseNumber)(i)
-                               i = skipSpace(i, False)
-                               return (i,res)
-                       i,res = parse(0)
-                       if i < len(s):
-                               raise ValueError('Extra data at end of input (index ' + str(i) + ' of ' + repr(s) + ': ' + repr(s[i:]) + ')')
-                       return res
-
-def preferredencoding():
-       """Get preferred encoding.
-
-       Returns the best encoding scheme for the system, based on
-       locale.getpreferredencoding() and some further tweaks.
-       """
-       def yield_preferredencoding():
-               try:
-                       pref = locale.getpreferredencoding()
-                       u'TEST'.encode(pref)
-               except:
-                       pref = 'UTF-8'
-               while True:
-                       yield pref
-       return yield_preferredencoding().next()
-
-
-def htmlentity_transform(matchobj):
-       """Transforms an HTML entity to a Unicode character.
-
-       This function receives a match object and is intended to be used with
-       the re.sub() function.
-       """
-       entity = matchobj.group(1)
-
-       # Known non-numeric HTML entity
-       if entity in htmlentitydefs.name2codepoint:
-               return unichr(htmlentitydefs.name2codepoint[entity])
-
-       # Unicode character
-       mobj = re.match(ur'(?u)#(x?\d+)', entity)
-       if mobj is not None:
-               numstr = mobj.group(1)
-               if numstr.startswith(u'x'):
-                       base = 16
-                       numstr = u'0%s' % numstr
-               else:
-                       base = 10
-               return unichr(long(numstr, base))
-
-       # Unknown entity in name, return its literal representation
-       return (u'&%s;' % entity)
-
-
-def sanitize_title(utitle):
-       """Sanitizes a video title so it could be used as part of a filename."""
-       utitle = re.sub(ur'(?u)&(.+?);', htmlentity_transform, utitle)
-       return utitle.replace(unicode(os.sep), u'%')
-
-
-def sanitize_open(filename, open_mode):
-       """Try to open the given filename, and slightly tweak it if this fails.
-
-       Attempts to open the given filename. If this fails, it tries to change
-       the filename slightly, step by step, until it's either able to open it
-       or it fails and raises a final exception, like the standard open()
-       function.
-
-       It returns the tuple (stream, definitive_file_name).
-       """
-       try:
-               if filename == u'-':
-                       if sys.platform == 'win32':
-                               import msvcrt
-                               msvcrt.setmode(sys.stdout.fileno(), os.O_BINARY)
-                       return (sys.stdout, filename)
-               stream = open(filename, open_mode)
-               return (stream, filename)
-       except (IOError, OSError), err:
-               # In case of error, try to remove win32 forbidden chars
-               filename = re.sub(ur'[/<>:"\|\?\*]', u'#', filename)
-
-               # An exception here should be caught in the caller
-               stream = open(filename, open_mode)
-               return (stream, filename)
-
-
-def timeconvert(timestr):
-       """Convert RFC 2822 defined time string into system timestamp"""
-       timestamp = None
-       timetuple = email.utils.parsedate_tz(timestr)
-       if timetuple is not None:
-               timestamp = email.utils.mktime_tz(timetuple)
-       return timestamp
-
-
-class DownloadError(Exception):
-       """Download Error exception.
-
-       This exception may be thrown by FileDownloader objects if they are not
-       configured to continue on errors. They will contain the appropriate
-       error message.
-       """
-       pass
-
-
-class SameFileError(Exception):
-       """Same File exception.
-
-       This exception will be thrown by FileDownloader objects if they detect
-       multiple files would have to be downloaded to the same file on disk.
-       """
-       pass
-
-
-class PostProcessingError(Exception):
-       """Post Processing exception.
-
-       This exception may be raised by PostProcessor's .run() method to
-       indicate an error in the postprocessing task.
-       """
-       pass
-
-
-class UnavailableVideoError(Exception):
-       """Unavailable Format exception.
-
-       This exception will be thrown when a video is requested
-       in a format that is not available for that video.
-       """
-       pass
-
-
-class ContentTooShortError(Exception):
-       """Content Too Short exception.
-
-       This exception may be raised by FileDownloader objects when a file they
-       download is too small for what the server announced first, indicating
-       the connection was probably interrupted.
-       """
-       # Both in bytes
-       downloaded = None
-       expected = None
-
-       def __init__(self, downloaded, expected):
-               self.downloaded = downloaded
-               self.expected = expected
-
-
-class YoutubeDLHandler(urllib2.HTTPHandler):
-       """Handler for HTTP requests and responses.
-
-       This class, when installed with an OpenerDirector, automatically adds
-       the standard headers to every HTTP request and handles gzipped and
-       deflated responses from web servers. If compression is to be avoided in
-       a particular request, the original request in the program code only has
-       to include the HTTP header "Youtubedl-No-Compression", which will be
-       removed before making the real request.
-
-       Part of this code was copied from:
-
-       http://techknack.net/python-urllib2-handlers/
-
-       Andrew Rowls, the author of that code, agreed to release it to the
-       public domain.
-       """
-
-       @staticmethod
-       def deflate(data):
-               try:
-                       return zlib.decompress(data, -zlib.MAX_WBITS)
-               except zlib.error:
-                       return zlib.decompress(data)
-
-       @staticmethod
-       def addinfourl_wrapper(stream, headers, url, code):
-               if hasattr(urllib2.addinfourl, 'getcode'):
-                       return urllib2.addinfourl(stream, headers, url, code)
-               ret = urllib2.addinfourl(stream, headers, url)
-               ret.code = code
-               return ret
-
-       def http_request(self, req):
-               for h in std_headers:
-                       if h in req.headers:
-                               del req.headers[h]
-                       req.add_header(h, std_headers[h])
-               if 'Youtubedl-no-compression' in req.headers:
-                       if 'Accept-encoding' in req.headers:
-                               del req.headers['Accept-encoding']
-                       del req.headers['Youtubedl-no-compression']
-               return req
-
-       def http_response(self, req, resp):
-               old_resp = resp
-               # gzip
-               if resp.headers.get('Content-encoding', '') == 'gzip':
-                       gz = gzip.GzipFile(fileobj=StringIO.StringIO(resp.read()), mode='r')
-                       resp = self.addinfourl_wrapper(gz, old_resp.headers, old_resp.url, old_resp.code)
-                       resp.msg = old_resp.msg
-               # deflate
-               if resp.headers.get('Content-encoding', '') == 'deflate':
-                       gz = StringIO.StringIO(self.deflate(resp.read()))
-                       resp = self.addinfourl_wrapper(gz, old_resp.headers, old_resp.url, old_resp.code)
-                       resp.msg = old_resp.msg
-               return resp
-
-
-class FileDownloader(object):
-       """File Downloader class.
-
-       File downloader objects are the ones responsible of downloading the
-       actual video file and writing it to disk if the user has requested
-       it, among some other tasks. In most cases there should be one per
-       program. As, given a video URL, the downloader doesn't know how to
-       extract all the needed information, task that InfoExtractors do, it
-       has to pass the URL to one of them.
-
-       For this, file downloader objects have a method that allows
-       InfoExtractors to be registered in a given order. When it is passed
-       a URL, the file downloader handles it to the first InfoExtractor it
-       finds that reports being able to handle it. The InfoExtractor extracts
-       all the information about the video or videos the URL refers to, and
-       asks the FileDownloader to process the video information, possibly
-       downloading the video.
-
-       File downloaders accept a lot of parameters. In order not to saturate
-       the object constructor with arguments, it receives a dictionary of
-       options instead. These options are available through the params
-       attribute for the InfoExtractors to use. The FileDownloader also
-       registers itself as the downloader in charge for the InfoExtractors
-       that are added to it, so this is a "mutual registration".
-
-       Available options:
-
-       username:         Username for authentication purposes.
-       password:         Password for authentication purposes.
-       usenetrc:         Use netrc for authentication instead.
-       quiet:            Do not print messages to stdout.
-       forceurl:         Force printing final URL.
-       forcetitle:       Force printing title.
-       forcethumbnail:   Force printing thumbnail URL.
-       forcedescription: Force printing description.
-       forcefilename:    Force printing final filename.
-       simulate:         Do not download the video files.
-       format:           Video format code.
-       format_limit:     Highest quality format to try.
-       outtmpl:          Template for output names.
-       ignoreerrors:     Do not stop on download errors.
-       ratelimit:        Download speed limit, in bytes/sec.
-       nooverwrites:     Prevent overwriting files.
-       retries:          Number of times to retry for HTTP error 5xx
-       continuedl:       Try to continue downloads if possible.
-       noprogress:       Do not print the progress bar.
-       playliststart:    Playlist item to start at.
-       playlistend:      Playlist item to end at.
-       matchtitle:       Download only matching titles.
-       rejecttitle:      Reject downloads for matching titles.
-       logtostderr:      Log messages to stderr instead of stdout.
-       consoletitle:     Display progress in console window's titlebar.
-       nopart:           Do not use temporary .part files.
-       updatetime:       Use the Last-modified header to set output file timestamps.
-       writedescription: Write the video description to a .description file
-       writeinfojson:    Write the video description to a .info.json file
-       """
-
-       params = None
-       _ies = []
-       _pps = []
-       _download_retcode = None
-       _num_downloads = None
-       _screen_file = None
-
-       def __init__(self, params):
-               """Create a FileDownloader object with the given options."""
-               self._ies = []
-               self._pps = []
-               self._download_retcode = 0
-               self._num_downloads = 0
-               self._screen_file = [sys.stdout, sys.stderr][params.get('logtostderr', False)]
-               self.params = params
-
-       @staticmethod
-       def format_bytes(bytes):
-               if bytes is None:
-                       return 'N/A'
-               if type(bytes) is str:
-                       bytes = float(bytes)
-               if bytes == 0.0:
-                       exponent = 0
-               else:
-                       exponent = long(math.log(bytes, 1024.0))
-               suffix = 'bkMGTPEZY'[exponent]
-               converted = float(bytes) / float(1024 ** exponent)
-               return '%.2f%s' % (converted, suffix)
-
-       @staticmethod
-       def calc_percent(byte_counter, data_len):
-               if data_len is None:
-                       return '---.-%'
-               return '%6s' % ('%3.1f%%' % (float(byte_counter) / float(data_len) * 100.0))
-
-       @staticmethod
-       def calc_eta(start, now, total, current):
-               if total is None:
-                       return '--:--'
-               dif = now - start
-               if current == 0 or dif < 0.001: # One millisecond
-                       return '--:--'
-               rate = float(current) / dif
-               eta = long((float(total) - float(current)) / rate)
-               (eta_mins, eta_secs) = divmod(eta, 60)
-               if eta_mins > 99:
-                       return '--:--'
-               return '%02d:%02d' % (eta_mins, eta_secs)
-
-       @staticmethod
-       def calc_speed(start, now, bytes):
-               dif = now - start
-               if bytes == 0 or dif < 0.001: # One millisecond
-                       return '%10s' % '---b/s'
-               return '%10s' % ('%s/s' % FileDownloader.format_bytes(float(bytes) / dif))
-
-       @staticmethod
-       def best_block_size(elapsed_time, bytes):
-               new_min = max(bytes / 2.0, 1.0)
-               new_max = min(max(bytes * 2.0, 1.0), 4194304) # Do not surpass 4 MB
-               if elapsed_time < 0.001:
-                       return long(new_max)
-               rate = bytes / elapsed_time
-               if rate > new_max:
-                       return long(new_max)
-               if rate < new_min:
-                       return long(new_min)
-               return long(rate)
-
-       @staticmethod
-       def parse_bytes(bytestr):
-               """Parse a string indicating a byte quantity into a long integer."""
-               matchobj = re.match(r'(?i)^(\d+(?:\.\d+)?)([kMGTPEZY]?)$', bytestr)
-               if matchobj is None:
-                       return None
-               number = float(matchobj.group(1))
-               multiplier = 1024.0 ** 'bkmgtpezy'.index(matchobj.group(2).lower())
-               return long(round(number * multiplier))
-
-       def add_info_extractor(self, ie):
-               """Add an InfoExtractor object to the end of the list."""
-               self._ies.append(ie)
-               ie.set_downloader(self)
-
-       def add_post_processor(self, pp):
-               """Add a PostProcessor object to the end of the chain."""
-               self._pps.append(pp)
-               pp.set_downloader(self)
-
-       def to_screen(self, message, skip_eol=False, ignore_encoding_errors=False):
-               """Print message to stdout if not in quiet mode."""
-               try:
-                       if not self.params.get('quiet', False):
-                               terminator = [u'\n', u''][skip_eol]
-                               print >>self._screen_file, (u'%s%s' % (message, terminator)).encode(preferredencoding()),
-                       self._screen_file.flush()
-               except (UnicodeEncodeError), err:
-                       if not ignore_encoding_errors:
-                               raise
-
-       def to_stderr(self, message):
-               """Print message to stderr."""
-               print >>sys.stderr, message.encode(preferredencoding())
-
-       def to_cons_title(self, message):
-               """Set console/terminal window title to message."""
-               if not self.params.get('consoletitle', False):
-                       return
-               if os.name == 'nt' and ctypes.windll.kernel32.GetConsoleWindow():
-                       # c_wchar_p() might not be necessary if `message` is
-                       # already of type unicode()
-                       ctypes.windll.kernel32.SetConsoleTitleW(ctypes.c_wchar_p(message))
-               elif 'TERM' in os.environ:
-                       sys.stderr.write('\033]0;%s\007' % message.encode(preferredencoding()))
-
-       def fixed_template(self):
-               """Checks if the output template is fixed."""
-               return (re.search(ur'(?u)%\(.+?\)s', self.params['outtmpl']) is None)
-
-       def trouble(self, message=None):
-               """Determine action to take when a download problem appears.
-
-               Depending on if the downloader has been configured to ignore
-               download errors or not, this method may throw an exception or
-               not when errors are found, after printing the message.
-               """
-               if message is not None:
-                       self.to_stderr(message)
-               if not self.params.get('ignoreerrors', False):
-                       raise DownloadError(message)
-               self._download_retcode = 1
-
-       def slow_down(self, start_time, byte_counter):
-               """Sleep if the download speed is over the rate limit."""
-               rate_limit = self.params.get('ratelimit', None)
-               if rate_limit is None or byte_counter == 0:
-                       return
-               now = time.time()
-               elapsed = now - start_time
-               if elapsed <= 0.0:
-                       return
-               speed = float(byte_counter) / elapsed
-               if speed > rate_limit:
-                       time.sleep((byte_counter - rate_limit * (now - start_time)) / rate_limit)
-
-       def temp_name(self, filename):
-               """Returns a temporary filename for the given filename."""
-               if self.params.get('nopart', False) or filename == u'-' or \
-                               (os.path.exists(filename) and not os.path.isfile(filename)):
-                       return filename
-               return filename + u'.part'
-
-       def undo_temp_name(self, filename):
-               if filename.endswith(u'.part'):
-                       return filename[:-len(u'.part')]
-               return filename
-
-       def try_rename(self, old_filename, new_filename):
-               try:
-                       if old_filename == new_filename:
-                               return
-                       os.rename(old_filename, new_filename)
-               except (IOError, OSError), err:
-                       self.trouble(u'ERROR: unable to rename file')
-
-       def try_utime(self, filename, last_modified_hdr):
-               """Try to set the last-modified time of the given file."""
-               if last_modified_hdr is None:
-                       return
-               if not os.path.isfile(filename):
-                       return
-               timestr = last_modified_hdr
-               if timestr is None:
-                       return
-               filetime = timeconvert(timestr)
-               if filetime is None:
-                       return filetime
-               try:
-                       os.utime(filename, (time.time(), filetime))
-               except:
-                       pass
-               return filetime
-
-       def report_writedescription(self, descfn):
-               """ Report that the description file is being written """
-               self.to_screen(u'[info] Writing video description to: %s' % descfn, ignore_encoding_errors=True)
-
-       def report_writeinfojson(self, infofn):
-               """ Report that the metadata file has been written """
-               self.to_screen(u'[info] Video description metadata as JSON to: %s' % infofn, ignore_encoding_errors=True)
-
-       def report_destination(self, filename):
-               """Report destination filename."""
-               self.to_screen(u'[download] Destination: %s' % filename, ignore_encoding_errors=True)
-
-       def report_progress(self, percent_str, data_len_str, speed_str, eta_str):
-               """Report download progress."""
-               if self.params.get('noprogress', False):
-                       return
-               self.to_screen(u'\r[download] %s of %s at %s ETA %s' %
-                               (percent_str, data_len_str, speed_str, eta_str), skip_eol=True)
-               self.to_cons_title(u'youtube-dl - %s of %s at %s ETA %s' %
-                               (percent_str.strip(), data_len_str.strip(), speed_str.strip(), eta_str.strip()))
-
-       def report_resuming_byte(self, resume_len):
-               """Report attempt to resume at given byte."""
-               self.to_screen(u'[download] Resuming download at byte %s' % resume_len)
-
-       def report_retry(self, count, retries):
-               """Report retry in case of HTTP error 5xx"""
-               self.to_screen(u'[download] Got server HTTP error. Retrying (attempt %d of %d)...' % (count, retries))
-
-       def report_file_already_downloaded(self, file_name):
-               """Report file has already been fully downloaded."""
-               try:
-                       self.to_screen(u'[download] %s has already been downloaded' % file_name)
-               except (UnicodeEncodeError), err:
-                       self.to_screen(u'[download] The file has already been downloaded')
-
-       def report_unable_to_resume(self):
-               """Report it was impossible to resume download."""
-               self.to_screen(u'[download] Unable to resume')
-
-       def report_finish(self):
-               """Report download finished."""
-               if self.params.get('noprogress', False):
-                       self.to_screen(u'[download] Download completed')
-               else:
-                       self.to_screen(u'')
-
-       def increment_downloads(self):
-               """Increment the ordinal that assigns a number to each file."""
-               self._num_downloads += 1
-
-       def prepare_filename(self, info_dict):
-               """Generate the output filename."""
-               try:
-                       template_dict = dict(info_dict)
-                       template_dict['epoch'] = unicode(long(time.time()))
-                       template_dict['autonumber'] = unicode('%05d' % self._num_downloads)
-                       filename = self.params['outtmpl'] % template_dict
-                       return filename
-               except (ValueError, KeyError), err:
-                       self.trouble(u'ERROR: invalid system charset or erroneous output template')
-                       return None
-
-       def process_info(self, info_dict):
-               """Process a single dictionary returned by an InfoExtractor."""
-               filename = self.prepare_filename(info_dict)
-               
-               # Forced printings
-               if self.params.get('forcetitle', False):
-                       print info_dict['title'].encode(preferredencoding(), 'xmlcharrefreplace')
-               if self.params.get('forceurl', False):
-                       print info_dict['url'].encode(preferredencoding(), 'xmlcharrefreplace')
-               if self.params.get('forcethumbnail', False) and 'thumbnail' in info_dict:
-                       print info_dict['thumbnail'].encode(preferredencoding(), 'xmlcharrefreplace')
-               if self.params.get('forcedescription', False) and 'description' in info_dict:
-                       print info_dict['description'].encode(preferredencoding(), 'xmlcharrefreplace')
-               if self.params.get('forcefilename', False) and filename is not None:
-                       print filename.encode(preferredencoding(), 'xmlcharrefreplace')
-               if self.params.get('forceformat', False):
-                       print info_dict['format'].encode(preferredencoding(), 'xmlcharrefreplace')
-
-               # Do nothing else if in simulate mode
-               if self.params.get('simulate', False):
-                       return
-
-               if filename is None:
-                       return
-
-               matchtitle=self.params.get('matchtitle',False)
-               rejecttitle=self.params.get('rejecttitle',False)
-               title=info_dict['title'].encode(preferredencoding(), 'xmlcharrefreplace')
-               if matchtitle and not re.search(matchtitle, title, re.IGNORECASE):
-                       self.to_screen(u'[download] "%s" title did not match pattern "%s"' % (title, matchtitle))
-                       return
-               if rejecttitle and re.search(rejecttitle, title, re.IGNORECASE):
-                       self.to_screen(u'[download] "%s" title matched reject pattern "%s"' % (title, rejecttitle))
-                       return
-                       
-               if self.params.get('nooverwrites', False) and os.path.exists(filename):
-                       self.to_stderr(u'WARNING: file exists and will be skipped')
-                       return
-
-               try:
-                       dn = os.path.dirname(filename)
-                       if dn != '' and not os.path.exists(dn):
-                               os.makedirs(dn)
-               except (OSError, IOError), err:
-                       self.trouble(u'ERROR: unable to create directory ' + unicode(err))
-                       return
-
-               if self.params.get('writedescription', False):
-                       try:
-                               descfn = filename + '.description'
-                               self.report_writedescription(descfn)
-                               descfile = open(descfn, 'wb')
-                               try:
-                                       descfile.write(info_dict['description'].encode('utf-8'))
-                               finally:
-                                       descfile.close()
-                       except (OSError, IOError):
-                               self.trouble(u'ERROR: Cannot write description file ' + descfn)
-                               return
-
-               if self.params.get('writeinfojson', False):
-                       infofn = filename + '.info.json'
-                       self.report_writeinfojson(infofn)
-                       try:
-                               json.dump
-                       except (NameError,AttributeError):
-                               self.trouble(u'ERROR: No JSON encoder found. Update to Python 2.6+, setup a json module, or leave out --write-info-json.')
-                               return
-                       try:
-                               infof = open(infofn, 'wb')
-                               try:
-                                       json_info_dict = dict((k,v) for k,v in info_dict.iteritems() if not k in ('urlhandle',))
-                                       json.dump(json_info_dict, infof)
-                               finally:
-                                       infof.close()
-                       except (OSError, IOError):
-                               self.trouble(u'ERROR: Cannot write metadata to JSON file ' + infofn)
-                               return
-
-               if not self.params.get('skip_download', False):
-                       try:
-                               success = self._do_download(filename, info_dict)
-                       except (OSError, IOError), err:
-                               raise UnavailableVideoError
-                       except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                               self.trouble(u'ERROR: unable to download video data: %s' % str(err))
-                               return
-                       except (ContentTooShortError, ), err:
-                               self.trouble(u'ERROR: content too short (expected %s bytes and served %s)' % (err.expected, err.downloaded))
-                               return
-       
-                       if success:
-                               try:
-                                       self.post_process(filename, info_dict)
-                               except (PostProcessingError), err:
-                                       self.trouble(u'ERROR: postprocessing: %s' % str(err))
-                                       return
-
-       def download(self, url_list):
-               """Download a given list of URLs."""
-               if len(url_list) > 1 and self.fixed_template():
-                       raise SameFileError(self.params['outtmpl'])
-
-               for url in url_list:
-                       suitable_found = False
-                       for ie in self._ies:
-                               # Go to next InfoExtractor if not suitable
-                               if not ie.suitable(url):
-                                       continue
-
-                               # Suitable InfoExtractor found
-                               suitable_found = True
-
-                               # Extract information from URL and process it
-                               ie.extract(url)
-
-                               # Suitable InfoExtractor had been found; go to next URL
-                               break
-
-                       if not suitable_found:
-                               self.trouble(u'ERROR: no suitable InfoExtractor: %s' % url)
-
-               return self._download_retcode
-
-       def post_process(self, filename, ie_info):
-               """Run the postprocessing chain on the given file."""
-               info = dict(ie_info)
-               info['filepath'] = filename
-               for pp in self._pps:
-                       info = pp.run(info)
-                       if info is None:
-                               break
-
-       def _download_with_rtmpdump(self, filename, url, player_url):
-               self.report_destination(filename)
-               tmpfilename = self.temp_name(filename)
-
-               # Check for rtmpdump first
-               try:
-                       subprocess.call(['rtmpdump', '-h'], stdout=(file(os.path.devnull, 'w')), stderr=subprocess.STDOUT)
-               except (OSError, IOError):
-                       self.trouble(u'ERROR: RTMP download detected but "rtmpdump" could not be run')
-                       return False
-
-               # Download using rtmpdump. rtmpdump returns exit code 2 when
-               # the connection was interrumpted and resuming appears to be
-               # possible. This is part of rtmpdump's normal usage, AFAIK.
-               basic_args = ['rtmpdump', '-q'] + [[], ['-W', player_url]][player_url is not None] + ['-r', url, '-o', tmpfilename]
-               retval = subprocess.call(basic_args + [[], ['-e', '-k', '1']][self.params.get('continuedl', False)])
-               while retval == 2 or retval == 1:
-                       prevsize = os.path.getsize(tmpfilename)
-                       self.to_screen(u'\r[rtmpdump] %s bytes' % prevsize, skip_eol=True)
-                       time.sleep(5.0) # This seems to be needed
-                       retval = subprocess.call(basic_args + ['-e'] + [[], ['-k', '1']][retval == 1])
-                       cursize = os.path.getsize(tmpfilename)
-                       if prevsize == cursize and retval == 1:
-                               break
-                        # Some rtmp streams seem abort after ~ 99.8%. Don't complain for those
-                       if prevsize == cursize and retval == 2 and cursize > 1024:
-                               self.to_screen(u'\r[rtmpdump] Could not download the whole video. This can happen for some advertisements.')
-                               retval = 0
-                               break
-               if retval == 0:
-                       self.to_screen(u'\r[rtmpdump] %s bytes' % os.path.getsize(tmpfilename))
-                       self.try_rename(tmpfilename, filename)
-                       return True
-               else:
-                       self.trouble(u'\nERROR: rtmpdump exited with code %d' % retval)
-                       return False
-
-       def _do_download(self, filename, info_dict):
-               url = info_dict['url']
-               player_url = info_dict.get('player_url', None)
-
-               # Check file already present
-               if self.params.get('continuedl', False) and os.path.isfile(filename) and not self.params.get('nopart', False):
-                       self.report_file_already_downloaded(filename)
-                       return True
-
-               # Attempt to download using rtmpdump
-               if url.startswith('rtmp'):
-                       return self._download_with_rtmpdump(filename, url, player_url)
-
-               tmpfilename = self.temp_name(filename)
-               stream = None
-
-               # Do not include the Accept-Encoding header
-               headers = {'Youtubedl-no-compression': 'True'}
-               basic_request = urllib2.Request(url, None, headers)
-               request = urllib2.Request(url, None, headers)
-
-               # Establish possible resume length
-               if os.path.isfile(tmpfilename):
-                       resume_len = os.path.getsize(tmpfilename)
-               else:
-                       resume_len = 0
-
-               open_mode = 'wb'
-               if resume_len != 0:
-                       if self.params.get('continuedl', False):
-                               self.report_resuming_byte(resume_len)
-                               request.add_header('Range','bytes=%d-' % resume_len)
-                               open_mode = 'ab'
-                       else:
-                               resume_len = 0
-
-               count = 0
-               retries = self.params.get('retries', 0)
-               while count <= retries:
-                       # Establish connection
-                       try:
-                               if count == 0 and 'urlhandle' in info_dict:
-                                       data = info_dict['urlhandle']
-                               data = urllib2.urlopen(request)
-                               break
-                       except (urllib2.HTTPError, ), err:
-                               if (err.code < 500 or err.code >= 600) and err.code != 416:
-                                       # Unexpected HTTP error
-                                       raise
-                               elif err.code == 416:
-                                       # Unable to resume (requested range not satisfiable)
-                                       try:
-                                               # Open the connection again without the range header
-                                               data = urllib2.urlopen(basic_request)
-                                               content_length = data.info()['Content-Length']
-                                       except (urllib2.HTTPError, ), err:
-                                               if err.code < 500 or err.code >= 600:
-                                                       raise
-                                       else:
-                                               # Examine the reported length
-                                               if (content_length is not None and
-                                                               (resume_len - 100 < long(content_length) < resume_len + 100)):
-                                                       # The file had already been fully downloaded.
-                                                       # Explanation to the above condition: in issue #175 it was revealed that
-                                                       # YouTube sometimes adds or removes a few bytes from the end of the file,
-                                                       # changing the file size slightly and causing problems for some users. So
-                                                       # I decided to implement a suggested change and consider the file
-                                                       # completely downloaded if the file size differs less than 100 bytes from
-                                                       # the one in the hard drive.
-                                                       self.report_file_already_downloaded(filename)
-                                                       self.try_rename(tmpfilename, filename)
-                                                       return True
-                                               else:
-                                                       # The length does not match, we start the download over
-                                                       self.report_unable_to_resume()
-                                                       open_mode = 'wb'
-                                                       break
-                       # Retry
-                       count += 1
-                       if count <= retries:
-                               self.report_retry(count, retries)
-
-               if count > retries:
-                       self.trouble(u'ERROR: giving up after %s retries' % retries)
-                       return False
-
-               data_len = data.info().get('Content-length', None)
-               if data_len is not None:
-                       data_len = long(data_len) + resume_len
-               data_len_str = self.format_bytes(data_len)
-               byte_counter = 0 + resume_len
-               block_size = 1024
-               start = time.time()
-               while True:
-                       # Download and write
-                       before = time.time()
-                       data_block = data.read(block_size)
-                       after = time.time()
-                       if len(data_block) == 0:
-                               break
-                       byte_counter += len(data_block)
-
-                       # Open file just in time
-                       if stream is None:
-                               try:
-                                       (stream, tmpfilename) = sanitize_open(tmpfilename, open_mode)
-                                       assert stream is not None
-                                       filename = self.undo_temp_name(tmpfilename)
-                                       self.report_destination(filename)
-                               except (OSError, IOError), err:
-                                       self.trouble(u'ERROR: unable to open for writing: %s' % str(err))
-                                       return False
-                       try:
-                               stream.write(data_block)
-                       except (IOError, OSError), err:
-                               self.trouble(u'\nERROR: unable to write data: %s' % str(err))
-                               return False
-                       block_size = self.best_block_size(after - before, len(data_block))
-
-                       # Progress message
-                       speed_str = self.calc_speed(start, time.time(), byte_counter - resume_len)
-                       if data_len is None:
-                               self.report_progress('Unknown %', data_len_str, speed_str, 'Unknown ETA')
-                       else:
-                               percent_str = self.calc_percent(byte_counter, data_len)
-                               eta_str = self.calc_eta(start, time.time(), data_len - resume_len, byte_counter - resume_len)
-                               self.report_progress(percent_str, data_len_str, speed_str, eta_str)
-
-                       # Apply rate limit
-                       self.slow_down(start, byte_counter - resume_len)
-
-               if stream is None:
-                       self.trouble(u'\nERROR: Did not get any data blocks')
-                       return False
-               stream.close()
-               self.report_finish()
-               if data_len is not None and byte_counter != data_len:
-                       raise ContentTooShortError(byte_counter, long(data_len))
-               self.try_rename(tmpfilename, filename)
-
-               # Update file modification time
-               if self.params.get('updatetime', True):
-                       info_dict['filetime'] = self.try_utime(filename, data.info().get('last-modified', None))
-
-               return True
-
-
-class InfoExtractor(object):
-       """Information Extractor class.
-
-       Information extractors are the classes that, given a URL, extract
-       information from the video (or videos) the URL refers to. This
-       information includes the real video URL, the video title and simplified
-       title, author and others. The information is stored in a dictionary
-       which is then passed to the FileDownloader. The FileDownloader
-       processes this information possibly downloading the video to the file
-       system, among other possible outcomes. The dictionaries must include
-       the following fields:
+    versions_info = compat_urllib_request.urlopen(JSON_URL).read().decode('utf-8')
+    versions_info = json.loads(versions_info)
+except:
+    sys.exit(u'ERROR: can\'t obtain versions info. Please try again later.')
+if not 'signature' in versions_info:
+    sys.exit(u'ERROR: the versions file is not signed or corrupted. Aborting.')
+signature = versions_info['signature']
+del versions_info['signature']
+if not rsa_verify(json.dumps(versions_info, sort_keys=True).encode('utf-8'), signature, UPDATES_RSA_KEY):
+    sys.exit(u'ERROR: the versions file signature is invalid. Aborting.')
+
+version = versions_info['versions'][versions_info['latest']]

 
 

-       id:             Video identifier.
-       url:            Final video URL.
-       uploader:       Nickname of the video uploader.
-       title:          Literal title.
-       stitle:         Simplified title.
-       ext:            Video filename extension.
-       format:         Video format.
-       player_url:     SWF Player URL (may be None).
-
-       The following fields are optional. Their primary purpose is to allow
-       youtube-dl to serve as the backend for a video search function, such
-       as the one in youtube2mp3.  They are only used when their respective
-       forced printing functions are called:
-
-       thumbnail:      Full URL to a video thumbnail image.
-       description:    One-line video description.
-
-       Subclasses of this one should re-define the _real_initialize() and
-       _real_extract() methods and define a _VALID_URL regexp.
-       Probably, they should also be added to the list of extractors.
-       """
-
-       _ready = False
-       _downloader = None
-
-       def __init__(self, downloader=None):
-               """Constructor. Receives an optional downloader."""
-               self._ready = False
-               self.set_downloader(downloader)
-
-       def suitable(self, url):
-               """Receives a URL and returns True if suitable for this IE."""
-               return re.match(self._VALID_URL, url) is not None
-
-       def initialize(self):
-               """Initializes an instance (authentication, etc)."""
-               if not self._ready:
-                       self._real_initialize()
-                       self._ready = True
-
-       def extract(self, url):
-               """Extracts URL information and returns it in list of dicts."""
-               self.initialize()
-               return self._real_extract(url)
-
-       def set_downloader(self, downloader):
-               """Sets the downloader for this IE."""
-               self._downloader = downloader
-
-       def _real_initialize(self):
-               """Real initialization process. Redefine in subclasses."""
-               pass
-
-       def _real_extract(self, url):
-               """Real extraction process. Redefine in subclasses."""
-               pass
-
-
-class YoutubeIE(InfoExtractor):
-       """Information extractor for youtube.com."""
-
-       _VALID_URL = r'^((?:https?://)?(?:youtu\.be/|(?:\w+\.)?youtube(?:-nocookie)?\.com/)(?!view_play_list|my_playlists|artist|playlist)(?:(?:(?:v|embed|e)/)|(?:(?:watch(?:_popup)?(?:\.php)?)?(?:\?|#!?)(?:.+&)?v=))?)?([0-9A-Za-z_-]+)(?(1).+)?$'
-       _LANG_URL = r'http://www.youtube.com/?hl=en&persist_hl=1&gl=US&persist_gl=1&opt_out_ackd=1'
-       _LOGIN_URL = 'https://www.youtube.com/signup?next=/&gl=US&hl=en'
-       _AGE_URL = 'http://www.youtube.com/verify_age?next_url=/&gl=US&hl=en'
-       _NETRC_MACHINE = 'youtube'
-       # Listed in order of quality
-       _available_formats = ['38', '37', '22', '45', '35', '44', '34', '18', '43', '6', '5', '17', '13']
-       _video_extensions = {
-               '13': '3gp',
-               '17': 'mp4',
-               '18': 'mp4',
-               '22': 'mp4',
-               '37': 'mp4',
-               '38': 'video', # You actually don't know if this will be MOV, AVI or whatever
-               '43': 'webm',
-               '44': 'webm',
-               '45': 'webm',
-       }
-       _video_dimensions = {
-               '5': '240x400',
-               '6': '???',
-               '13': '???',
-               '17': '144x176',
-               '18': '360x640',
-               '22': '720x1280',
-               '34': '360x640',
-               '35': '480x854',
-               '37': '1080x1920',
-               '38': '3072x4096',
-               '43': '360x640',
-               '44': '480x854',
-               '45': '720x1280',
-       }       
-       IE_NAME = u'youtube'
-
-       def report_lang(self):
-               """Report attempt to set language."""
-               self._downloader.to_screen(u'[youtube] Setting language')
-
-       def report_login(self):
-               """Report attempt to log in."""
-               self._downloader.to_screen(u'[youtube] Logging in')
-
-       def report_age_confirmation(self):
-               """Report attempt to confirm age."""
-               self._downloader.to_screen(u'[youtube] Confirming age')
-
-       def report_video_webpage_download(self, video_id):
-               """Report attempt to download video webpage."""
-               self._downloader.to_screen(u'[youtube] %s: Downloading video webpage' % video_id)
-
-       def report_video_info_webpage_download(self, video_id):
-               """Report attempt to download video info webpage."""
-               self._downloader.to_screen(u'[youtube] %s: Downloading video info webpage' % video_id)
-
-       def report_information_extraction(self, video_id):
-               """Report attempt to extract video information."""
-               self._downloader.to_screen(u'[youtube] %s: Extracting video information' % video_id)
-
-       def report_unavailable_format(self, video_id, format):
-               """Report extracted video URL."""
-               self._downloader.to_screen(u'[youtube] %s: Format %s not available' % (video_id, format))
-
-       def report_rtmp_download(self):
-               """Indicate the download will use the RTMP protocol."""
-               self._downloader.to_screen(u'[youtube] RTMP download detected')
-
-       def _print_formats(self, formats):
-               print 'Available formats:'
-               for x in formats:
-                       print '%s\t:\t%s\t[%s]' %(x, self._video_extensions.get(x, 'flv'), self._video_dimensions.get(x, '???'))
-
-       def _real_initialize(self):
-               if self._downloader is None:
-                       return
-
-               username = None
-               password = None
-               downloader_params = self._downloader.params
-
-               # Attempt to use provided username and password or .netrc data
-               if downloader_params.get('username', None) is not None:
-                       username = downloader_params['username']
-                       password = downloader_params['password']
-               elif downloader_params.get('usenetrc', False):
-                       try:
-                               info = netrc.netrc().authenticators(self._NETRC_MACHINE)
-                               if info is not None:
-                                       username = info[0]
-                                       password = info[2]
-                               else:
-                                       raise netrc.NetrcParseError('No authenticators for %s' % self._NETRC_MACHINE)
-                       except (IOError, netrc.NetrcParseError), err:
-                               self._downloader.to_stderr(u'WARNING: parsing .netrc: %s' % str(err))
-                               return
-
-               # Set language
-               request = urllib2.Request(self._LANG_URL)
-               try:
-                       self.report_lang()
-                       urllib2.urlopen(request).read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self._downloader.to_stderr(u'WARNING: unable to set language: %s' % str(err))
-                       return
-
-               # No authentication to be performed
-               if username is None:
-                       return
-
-               # Log in
-               login_form = {
-                               'current_form': 'loginForm',
-                               'next':         '/',
-                               'action_login': 'Log In',
-                               'username':     username,
-                               'password':     password,
-                               }
-               request = urllib2.Request(self._LOGIN_URL, urllib.urlencode(login_form))
-               try:
-                       self.report_login()
-                       login_results = urllib2.urlopen(request).read()
-                       if re.search(r'(?i)<form[^>]* name="loginForm"', login_results) is not None:
-                               self._downloader.to_stderr(u'WARNING: unable to log in: bad username or password')
-                               return
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self._downloader.to_stderr(u'WARNING: unable to log in: %s' % str(err))
-                       return
-
-               # Confirm age
-               age_form = {
-                               'next_url':             '/',
-                               'action_confirm':       'Confirm',
-                               }
-               request = urllib2.Request(self._AGE_URL, urllib.urlencode(age_form))
-               try:
-                       self.report_age_confirmation()
-                       age_results = urllib2.urlopen(request).read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self._downloader.trouble(u'ERROR: unable to confirm age: %s' % str(err))
-                       return
-
-       def _real_extract(self, url):
-               # Extract video id from URL
-               mobj = re.match(self._VALID_URL, url)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: invalid URL: %s' % url)
-                       return
-               video_id = mobj.group(2)
-
-               # Get video webpage
-               self.report_video_webpage_download(video_id)
-               request = urllib2.Request('http://www.youtube.com/watch?v=%s&gl=US&hl=en&has_verified=1' % video_id)
-               try:
-                       video_webpage = urllib2.urlopen(request).read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self._downloader.trouble(u'ERROR: unable to download video webpage: %s' % str(err))
-                       return
-
-               # Attempt to extract SWF player URL
-               mobj = re.search(r'swfConfig.*?"(http:\\/\\/.*?watch.*?-.*?\.swf)"', video_webpage)
-               if mobj is not None:
-                       player_url = re.sub(r'\\(.)', r'\1', mobj.group(1))
-               else:
-                       player_url = None
-
-               # Get video info
-               self.report_video_info_webpage_download(video_id)
-               for el_type in ['&el=embedded', '&el=detailpage', '&el=vevo', '']:
-                       video_info_url = ('http://www.youtube.com/get_video_info?&video_id=%s%s&ps=default&eurl=&gl=US&hl=en'
-                                       % (video_id, el_type))
-                       request = urllib2.Request(video_info_url)
-                       try:
-                               video_info_webpage = urllib2.urlopen(request).read()
-                               video_info = parse_qs(video_info_webpage)
-                               if 'token' in video_info:
-                                       break
-                       except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                               self._downloader.trouble(u'ERROR: unable to download video info webpage: %s' % str(err))
-                               return
-               if 'token' not in video_info:
-                       if 'reason' in video_info:
-                               self._downloader.trouble(u'ERROR: YouTube said: %s' % video_info['reason'][0].decode('utf-8'))
-                       else:
-                               self._downloader.trouble(u'ERROR: "token" parameter not in video info for unknown reason')
-                       return
-
-               # Start extracting information
-               self.report_information_extraction(video_id)
-
-               # uploader
-               if 'author' not in video_info:
-                       self._downloader.trouble(u'ERROR: unable to extract uploader nickname')
-                       return
-               video_uploader = urllib.unquote_plus(video_info['author'][0])
-
-               # title
-               if 'title' not in video_info:
-                       self._downloader.trouble(u'ERROR: unable to extract video title')
-                       return
-               video_title = urllib.unquote_plus(video_info['title'][0])
-               video_title = video_title.decode('utf-8')
-               video_title = sanitize_title(video_title)
-
-               # simplified title
-               simple_title = re.sub(ur'(?u)([^%s]+)' % simple_title_chars, ur'_', video_title)
-               simple_title = simple_title.strip(ur'_')
-
-               # thumbnail image
-               if 'thumbnail_url' not in video_info:
-                       self._downloader.trouble(u'WARNING: unable to extract video thumbnail')
-                       video_thumbnail = ''
-               else:   # don't panic if we can't find it
-                       video_thumbnail = urllib.unquote_plus(video_info['thumbnail_url'][0])
-
-               # upload date
-               upload_date = u'NA'
-               mobj = re.search(r'id="eow-date.*?>(.*?)</span>', video_webpage, re.DOTALL)
-               if mobj is not None:
-                       upload_date = ' '.join(re.sub(r'[/,-]', r' ', mobj.group(1)).split())
-                       format_expressions = ['%d %B %Y', '%B %d %Y', '%b %d %Y']
-                       for expression in format_expressions:
-                               try:
-                                       upload_date = datetime.datetime.strptime(upload_date, expression).strftime('%Y%m%d')
-                               except:
-                                       pass
-
-               # description
-               try:
-                       lxml.etree
-               except NameError:
-                       video_description = u'No description available.'
-                       if self._downloader.params.get('forcedescription', False) or self._downloader.params.get('writedescription', False):
-                               mobj = re.search(r'<meta name="description" content="(.*)"(?:\s*/)?>', video_webpage)
-                               if mobj is not None:
-                                       video_description = mobj.group(1).decode('utf-8')
-               else:
-                       html_parser = lxml.etree.HTMLParser(encoding='utf-8')
-                       vwebpage_doc = lxml.etree.parse(StringIO.StringIO(video_webpage), html_parser)
-                       video_description = u''.join(vwebpage_doc.xpath('id("eow-description")//text()'))
-                       # TODO use another parser
-
-               # token
-               video_token = urllib.unquote_plus(video_info['token'][0])
-
-               # Decide which formats to download
-               req_format = self._downloader.params.get('format', None)
-
-               if 'conn' in video_info and video_info['conn'][0].startswith('rtmp'):
-                       self.report_rtmp_download()
-                       video_url_list = [(None, video_info['conn'][0])]
-               elif 'url_encoded_fmt_stream_map' in video_info and len(video_info['url_encoded_fmt_stream_map']) >= 1:
-                       url_data_strs = video_info['url_encoded_fmt_stream_map'][0].split(',')
-                       url_data = [parse_qs(uds) for uds in url_data_strs]
-                       url_data = filter(lambda ud: 'itag' in ud and 'url' in ud, url_data)
-                       url_map = dict((ud['itag'][0], ud['url'][0]) for ud in url_data)
-
-                       format_limit = self._downloader.params.get('format_limit', None)
-                       if format_limit is not None and format_limit in self._available_formats:
-                               format_list = self._available_formats[self._available_formats.index(format_limit):]
-                       else:
-                               format_list = self._available_formats
-                       existing_formats = [x for x in format_list if x in url_map]
-                       if len(existing_formats) == 0:
-                               self._downloader.trouble(u'ERROR: no known formats available for video')
-                               return
-                       if self._downloader.params.get('listformats', None):
-                               self._print_formats(existing_formats)
-                               return
-                       if req_format is None or req_format == 'best':
-                               video_url_list = [(existing_formats[0], url_map[existing_formats[0]])] # Best quality
-                       elif req_format == 'worst':
-                               video_url_list = [(existing_formats[len(existing_formats)-1], url_map[existing_formats[len(existing_formats)-1]])] # worst quality
-                       elif req_format in ('-1', 'all'):
-                               video_url_list = [(f, url_map[f]) for f in existing_formats] # All formats
-                       else:
-                               # Specific formats. We pick the first in a slash-delimeted sequence.
-                               # For example, if '1/2/3/4' is requested and '2' and '4' are available, we pick '2'.
-                               req_formats = req_format.split('/')
-                               video_url_list = None
-                               for rf in req_formats:
-                                       if rf in url_map:
-                                               video_url_list = [(rf, url_map[rf])]
-                                               break
-                               if video_url_list is None:
-                                       self._downloader.trouble(u'ERROR: requested format not available')
-                                       return
-               else:
-                       self._downloader.trouble(u'ERROR: no conn or url_encoded_fmt_stream_map information found in video info')
-                       return
-
-               for format_param, video_real_url in video_url_list:
-                       # At this point we have a new video
-                       self._downloader.increment_downloads()
-
-                       # Extension
-                       video_extension = self._video_extensions.get(format_param, 'flv')
-
-                       try:
-                               # Process video information
-                               self._downloader.process_info({
-                                       'id':           video_id.decode('utf-8'),
-                                       'url':          video_real_url.decode('utf-8'),
-                                       'uploader':     video_uploader.decode('utf-8'),
-                                       'upload_date':  upload_date,
-                                       'title':        video_title,
-                                       'stitle':       simple_title,
-                                       'ext':          video_extension.decode('utf-8'),
-                                       'format':       (format_param is None and u'NA' or format_param.decode('utf-8')),
-                                       'thumbnail':    video_thumbnail.decode('utf-8'),
-                                       'description':  video_description,
-                                       'player_url':   player_url,
-                               })
-                       except UnavailableVideoError, err:
-                               self._downloader.trouble(u'\nERROR: unable to download video')
-
-
-class MetacafeIE(InfoExtractor):
-       """Information Extractor for metacafe.com."""
-
-       _VALID_URL = r'(?:http://)?(?:www\.)?metacafe\.com/watch/([^/]+)/([^/]+)/.*'
-       _DISCLAIMER = 'http://www.metacafe.com/family_filter/'
-       _FILTER_POST = 'http://www.metacafe.com/f/index.php?inputType=filter&controllerGroup=user'
-       _youtube_ie = None
-       IE_NAME = u'metacafe'
-
-       def __init__(self, youtube_ie, downloader=None):
-               InfoExtractor.__init__(self, downloader)
-               self._youtube_ie = youtube_ie
-
-       def report_disclaimer(self):
-               """Report disclaimer retrieval."""
-               self._downloader.to_screen(u'[metacafe] Retrieving disclaimer')
-
-       def report_age_confirmation(self):
-               """Report attempt to confirm age."""
-               self._downloader.to_screen(u'[metacafe] Confirming age')
-
-       def report_download_webpage(self, video_id):
-               """Report webpage download."""
-               self._downloader.to_screen(u'[metacafe] %s: Downloading webpage' % video_id)
-
-       def report_extraction(self, video_id):
-               """Report information extraction."""
-               self._downloader.to_screen(u'[metacafe] %s: Extracting information' % video_id)
-
-       def _real_initialize(self):
-               # Retrieve disclaimer
-               request = urllib2.Request(self._DISCLAIMER)
-               try:
-                       self.report_disclaimer()
-                       disclaimer = urllib2.urlopen(request).read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self._downloader.trouble(u'ERROR: unable to retrieve disclaimer: %s' % str(err))
-                       return
-
-               # Confirm age
-               disclaimer_form = {
-                       'filters': '0',
-                       'submit': "Continue - I'm over 18",
-                       }
-               request = urllib2.Request(self._FILTER_POST, urllib.urlencode(disclaimer_form))
-               try:
-                       self.report_age_confirmation()
-                       disclaimer = urllib2.urlopen(request).read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self._downloader.trouble(u'ERROR: unable to confirm age: %s' % str(err))
-                       return
-
-       def _real_extract(self, url):
-               # Extract id and simplified title from URL
-               mobj = re.match(self._VALID_URL, url)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: invalid URL: %s' % url)
-                       return
-
-               video_id = mobj.group(1)
-
-               # Check if video comes from YouTube
-               mobj2 = re.match(r'^yt-(.*)$', video_id)
-               if mobj2 is not None:
-                       self._youtube_ie.extract('http://www.youtube.com/watch?v=%s' % mobj2.group(1))
-                       return
-
-               # At this point we have a new video
-               self._downloader.increment_downloads()
-
-               simple_title = mobj.group(2).decode('utf-8')
-
-               # Retrieve video webpage to extract further information
-               request = urllib2.Request('http://www.metacafe.com/watch/%s/' % video_id)
-               try:
-                       self.report_download_webpage(video_id)
-                       webpage = urllib2.urlopen(request).read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self._downloader.trouble(u'ERROR: unable retrieve video webpage: %s' % str(err))
-                       return
-
-               # Extract URL, uploader and title from webpage
-               self.report_extraction(video_id)
-               mobj = re.search(r'(?m)&mediaURL=([^&]+)', webpage)
-               if mobj is not None:
-                       mediaURL = urllib.unquote(mobj.group(1))
-                       video_extension = mediaURL[-3:]
-
-                       # Extract gdaKey if available
-                       mobj = re.search(r'(?m)&gdaKey=(.*?)&', webpage)
-                       if mobj is None:
-                               video_url = mediaURL
-                       else:
-                               gdaKey = mobj.group(1)
-                               video_url = '%s?__gda__=%s' % (mediaURL, gdaKey)
-               else:
-                       mobj = re.search(r' name="flashvars" value="(.*?)"', webpage)
-                       if mobj is None:
-                               self._downloader.trouble(u'ERROR: unable to extract media URL')
-                               return
-                       vardict = parse_qs(mobj.group(1))
-                       if 'mediaData' not in vardict:
-                               self._downloader.trouble(u'ERROR: unable to extract media URL')
-                               return
-                       mobj = re.search(r'"mediaURL":"(http.*?)","key":"(.*?)"', vardict['mediaData'][0])
-                       if mobj is None:
-                               self._downloader.trouble(u'ERROR: unable to extract media URL')
-                               return
-                       mediaURL = mobj.group(1).replace('\\/', '/')
-                       video_extension = mediaURL[-3:]
-                       video_url = '%s?__gda__=%s' % (mediaURL, mobj.group(2))
-
-               mobj = re.search(r'(?im)<title>(.*) - Video</title>', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract title')
-                       return
-               video_title = mobj.group(1).decode('utf-8')
-               video_title = sanitize_title(video_title)
-
-               mobj = re.search(r'(?ms)By:\s*<a .*?>(.+?)<', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract uploader nickname')
-                       return
-               video_uploader = mobj.group(1)
-
-               try:
-                       # Process video information
-                       self._downloader.process_info({
-                               'id':           video_id.decode('utf-8'),
-                               'url':          video_url.decode('utf-8'),
-                               'uploader':     video_uploader.decode('utf-8'),
-                               'upload_date':  u'NA',
-                               'title':        video_title,
-                               'stitle':       simple_title,
-                               'ext':          video_extension.decode('utf-8'),
-                               'format':       u'NA',
-                               'player_url':   None,
-                       })
-               except UnavailableVideoError:
-                       self._downloader.trouble(u'\nERROR: unable to download video')
-
-
-class DailymotionIE(InfoExtractor):
-       """Information Extractor for Dailymotion"""
-
-       _VALID_URL = r'(?i)(?:https?://)?(?:www\.)?dailymotion\.[a-z]{2,3}/video/([^_/]+)_([^/]+)'
-       IE_NAME = u'dailymotion'
-
-       def __init__(self, downloader=None):
-               InfoExtractor.__init__(self, downloader)
-
-       def report_download_webpage(self, video_id):
-               """Report webpage download."""
-               self._downloader.to_screen(u'[dailymotion] %s: Downloading webpage' % video_id)
-
-       def report_extraction(self, video_id):
-               """Report information extraction."""
-               self._downloader.to_screen(u'[dailymotion] %s: Extracting information' % video_id)
-
-       def _real_initialize(self):
-               return
-
-       def _real_extract(self, url):
-               # Extract id and simplified title from URL
-               mobj = re.match(self._VALID_URL, url)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: invalid URL: %s' % url)
-                       return
-
-               # At this point we have a new video
-               self._downloader.increment_downloads()
-               video_id = mobj.group(1)
-
-               simple_title = mobj.group(2).decode('utf-8')
-               video_extension = 'flv'
-
-               # Retrieve video webpage to extract further information
-               request = urllib2.Request(url)
-               request.add_header('Cookie', 'family_filter=off')
-               try:
-                       self.report_download_webpage(video_id)
-                       webpage = urllib2.urlopen(request).read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self._downloader.trouble(u'ERROR: unable retrieve video webpage: %s' % str(err))
-                       return
-
-               # Extract URL, uploader and title from webpage
-               self.report_extraction(video_id)
-               mobj = re.search(r'(?i)addVariable\(\"sequence\"\s*,\s*\"([^\"]+?)\"\)', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract media URL')
-                       return
-               sequence = urllib.unquote(mobj.group(1))
-               mobj = re.search(r',\"sdURL\"\:\"([^\"]+?)\",', sequence)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract media URL')
-                       return
-               mediaURL = urllib.unquote(mobj.group(1)).replace('\\', '')
-
-               # if needed add http://www.dailymotion.com/ if relative URL
-
-               video_url = mediaURL
-
-               mobj = re.search(r'(?im)<title>Dailymotion\s*-\s*(.+)\s*-\s*[^<]+?</title>', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract title')
-                       return
-               video_title = mobj.group(1).decode('utf-8')
-               video_title = sanitize_title(video_title)
-
-               mobj = re.search(r'(?im)<span class="owner[^\"]+?">[^<]+?<a [^>]+?>([^<]+?)</a></span>', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract uploader nickname')
-                       return
-               video_uploader = mobj.group(1)
-
-               try:
-                       # Process video information
-                       self._downloader.process_info({
-                               'id':           video_id.decode('utf-8'),
-                               'url':          video_url.decode('utf-8'),
-                               'uploader':     video_uploader.decode('utf-8'),
-                               'upload_date':  u'NA',
-                               'title':        video_title,
-                               'stitle':       simple_title,
-                               'ext':          video_extension.decode('utf-8'),
-                               'format':       u'NA',
-                               'player_url':   None,
-                       })
-               except UnavailableVideoError:
-                       self._downloader.trouble(u'\nERROR: unable to download video')
-
-
-class GoogleIE(InfoExtractor):
-       """Information extractor for video.google.com."""
-
-       _VALID_URL = r'(?:http://)?video\.google\.(?:com(?:\.au)?|co\.(?:uk|jp|kr|cr)|ca|de|es|fr|it|nl|pl)/videoplay\?docid=([^\&]+).*'
-       IE_NAME = u'video.google'
-
-       def __init__(self, downloader=None):
-               InfoExtractor.__init__(self, downloader)
-
-       def report_download_webpage(self, video_id):
-               """Report webpage download."""
-               self._downloader.to_screen(u'[video.google] %s: Downloading webpage' % video_id)
-
-       def report_extraction(self, video_id):
-               """Report information extraction."""
-               self._downloader.to_screen(u'[video.google] %s: Extracting information' % video_id)
-
-       def _real_initialize(self):
-               return
-
-       def _real_extract(self, url):
-               # Extract id from URL
-               mobj = re.match(self._VALID_URL, url)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: Invalid URL: %s' % url)
-                       return
-
-               # At this point we have a new video
-               self._downloader.increment_downloads()
-               video_id = mobj.group(1)
-
-               video_extension = 'mp4'
-
-               # Retrieve video webpage to extract further information
-               request = urllib2.Request('http://video.google.com/videoplay?docid=%s&hl=en&oe=utf-8' % video_id)
-               try:
-                       self.report_download_webpage(video_id)
-                       webpage = urllib2.urlopen(request).read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % str(err))
-                       return
-
-               # Extract URL, uploader, and title from webpage
-               self.report_extraction(video_id)
-               mobj = re.search(r"download_url:'([^']+)'", webpage)
-               if mobj is None:
-                       video_extension = 'flv'
-                       mobj = re.search(r"(?i)videoUrl\\x3d(.+?)\\x26", webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract media URL')
-                       return
-               mediaURL = urllib.unquote(mobj.group(1))
-               mediaURL = mediaURL.replace('\\x3d', '\x3d')
-               mediaURL = mediaURL.replace('\\x26', '\x26')
-
-               video_url = mediaURL
-
-               mobj = re.search(r'<title>(.*)</title>', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract title')
-                       return
-               video_title = mobj.group(1).decode('utf-8')
-               video_title = sanitize_title(video_title)
-               simple_title = re.sub(ur'(?u)([^%s]+)' % simple_title_chars, ur'_', video_title)
-
-               # Extract video description
-               mobj = re.search(r'<span id=short-desc-content>([^<]*)</span>', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract video description')
-                       return
-               video_description = mobj.group(1).decode('utf-8')
-               if not video_description:
-                       video_description = 'No description available.'
-
-               # Extract video thumbnail
-               if self._downloader.params.get('forcethumbnail', False):
-                       request = urllib2.Request('http://video.google.com/videosearch?q=%s+site:video.google.com&hl=en' % abs(int(video_id)))
-                       try:
-                               webpage = urllib2.urlopen(request).read()
-                       except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                               self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % str(err))
-                               return
-                       mobj = re.search(r'<img class=thumbnail-img (?:.* )?src=(http.*)>', webpage)
-                       if mobj is None:
-                               self._downloader.trouble(u'ERROR: unable to extract video thumbnail')
-                               return
-                       video_thumbnail = mobj.group(1)
-               else:   # we need something to pass to process_info
-                       video_thumbnail = ''
-
-               try:
-                       # Process video information
-                       self._downloader.process_info({
-                               'id':           video_id.decode('utf-8'),
-                               'url':          video_url.decode('utf-8'),
-                               'uploader':     u'NA',
-                               'upload_date':  u'NA',
-                               'title':        video_title,
-                               'stitle':       simple_title,
-                               'ext':          video_extension.decode('utf-8'),
-                               'format':       u'NA',
-                               'player_url':   None,
-                       })
-               except UnavailableVideoError:
-                       self._downloader.trouble(u'\nERROR: unable to download video')
-
-
-class PhotobucketIE(InfoExtractor):
-       """Information extractor for photobucket.com."""
-
-       _VALID_URL = r'(?:http://)?(?:[a-z0-9]+\.)?photobucket\.com/.*[\?\&]current=(.*\.flv)'
-       IE_NAME = u'photobucket'
-
-       def __init__(self, downloader=None):
-               InfoExtractor.__init__(self, downloader)
-
-       def report_download_webpage(self, video_id):
-               """Report webpage download."""
-               self._downloader.to_screen(u'[photobucket] %s: Downloading webpage' % video_id)
-
-       def report_extraction(self, video_id):
-               """Report information extraction."""
-               self._downloader.to_screen(u'[photobucket] %s: Extracting information' % video_id)
-
-       def _real_initialize(self):
-               return
-
-       def _real_extract(self, url):
-               # Extract id from URL
-               mobj = re.match(self._VALID_URL, url)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: Invalid URL: %s' % url)
-                       return
-
-               # At this point we have a new video
-               self._downloader.increment_downloads()
-               video_id = mobj.group(1)
-
-               video_extension = 'flv'
-
-               # Retrieve video webpage to extract further information
-               request = urllib2.Request(url)
-               try:
-                       self.report_download_webpage(video_id)
-                       webpage = urllib2.urlopen(request).read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % str(err))
-                       return
-
-               # Extract URL, uploader, and title from webpage
-               self.report_extraction(video_id)
-               mobj = re.search(r'<link rel="video_src" href=".*\?file=([^"]+)" />', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract media URL')
-                       return
-               mediaURL = urllib.unquote(mobj.group(1))
-
-               video_url = mediaURL
-
-               mobj = re.search(r'<title>(.*) video by (.*) - Photobucket</title>', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract title')
-                       return
-               video_title = mobj.group(1).decode('utf-8')
-               video_title = sanitize_title(video_title)
-               simple_title = re.sub(ur'(?u)([^%s]+)' % simple_title_chars, ur'_', video_title)
-
-               video_uploader = mobj.group(2).decode('utf-8')
-
-               try:
-                       # Process video information
-                       self._downloader.process_info({
-                               'id':           video_id.decode('utf-8'),
-                               'url':          video_url.decode('utf-8'),
-                               'uploader':     video_uploader,
-                               'upload_date':  u'NA',
-                               'title':        video_title,
-                               'stitle':       simple_title,
-                               'ext':          video_extension.decode('utf-8'),
-                               'format':       u'NA',
-                               'player_url':   None,
-                       })
-               except UnavailableVideoError:
-                       self._downloader.trouble(u'\nERROR: unable to download video')
-
-
-class YahooIE(InfoExtractor):
-       """Information extractor for video.yahoo.com."""
-
-       # _VALID_URL matches all Yahoo! Video URLs
-       # _VPAGE_URL matches only the extractable '/watch/' URLs
-       _VALID_URL = r'(?:http://)?(?:[a-z]+\.)?video\.yahoo\.com/(?:watch|network)/([0-9]+)(?:/|\?v=)([0-9]+)(?:[#\?].*)?'
-       _VPAGE_URL = r'(?:http://)?video\.yahoo\.com/watch/([0-9]+)/([0-9]+)(?:[#\?].*)?'
-       IE_NAME = u'video.yahoo'
-
-       def __init__(self, downloader=None):
-               InfoExtractor.__init__(self, downloader)
-
-       def report_download_webpage(self, video_id):
-               """Report webpage download."""
-               self._downloader.to_screen(u'[video.yahoo] %s: Downloading webpage' % video_id)
-
-       def report_extraction(self, video_id):
-               """Report information extraction."""
-               self._downloader.to_screen(u'[video.yahoo] %s: Extracting information' % video_id)
-
-       def _real_initialize(self):
-               return
-
-       def _real_extract(self, url, new_video=True):
-               # Extract ID from URL
-               mobj = re.match(self._VALID_URL, url)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: Invalid URL: %s' % url)
-                       return
+try:
+    urlh = compat_urllib_request.urlopen(version['bin'][0])
+    newcontent = urlh.read()
+    urlh.close()
+except (IOError, OSError) as err:
+    sys.exit('ERROR: unable to download latest version')

 
 

-               # At this point we have a new video
-               self._downloader.increment_downloads()
-               video_id = mobj.group(2)
-               video_extension = 'flv'
+newcontent_hash = hashlib.sha256(newcontent).hexdigest()
+if newcontent_hash != version['bin'][1]:
+    sys.exit(u'ERROR: the downloaded file hash does not match. Aborting.')

 
 

-               # Rewrite valid but non-extractable URLs as
-               # extractable English language /watch/ URLs
-               if re.match(self._VPAGE_URL, url) is None:
-                       request = urllib2.Request(url)
-                       try:
-                               webpage = urllib2.urlopen(request).read()
-                       except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                               self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % str(err))
-                               return
-
-                       mobj = re.search(r'\("id", "([0-9]+)"\);', webpage)
-                       if mobj is None:
-                               self._downloader.trouble(u'ERROR: Unable to extract id field')
-                               return
-                       yahoo_id = mobj.group(1)
-
-                       mobj = re.search(r'\("vid", "([0-9]+)"\);', webpage)
-                       if mobj is None:
-                               self._downloader.trouble(u'ERROR: Unable to extract vid field')
-                               return
-                       yahoo_vid = mobj.group(1)
-
-                       url = 'http://video.yahoo.com/watch/%s/%s' % (yahoo_vid, yahoo_id)
-                       return self._real_extract(url, new_video=False)
-
-               # Retrieve video webpage to extract further information
-               request = urllib2.Request(url)
-               try:
-                       self.report_download_webpage(video_id)
-                       webpage = urllib2.urlopen(request).read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % str(err))
-                       return
-
-               # Extract uploader and title from webpage
-               self.report_extraction(video_id)
-               mobj = re.search(r'<meta name="title" content="(.*)" />', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract video title')
-                       return
-               video_title = mobj.group(1).decode('utf-8')
-               simple_title = re.sub(ur'(?u)([^%s]+)' % simple_title_chars, ur'_', video_title)
-
-               mobj = re.search(r'<h2 class="ti-5"><a href="http://video\.yahoo\.com/(people|profile)/[0-9]+" beacon=".*">(.*)</a></h2>', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract video uploader')
-                       return
-               video_uploader = mobj.group(1).decode('utf-8')
-
-               # Extract video thumbnail
-               mobj = re.search(r'<link rel="image_src" href="(.*)" />', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract video thumbnail')
-                       return
-               video_thumbnail = mobj.group(1).decode('utf-8')
-
-               # Extract video description
-               mobj = re.search(r'<meta name="description" content="(.*)" />', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract video description')
-                       return
-               video_description = mobj.group(1).decode('utf-8')
-               if not video_description:
-                       video_description = 'No description available.'
-
-               # Extract video height and width
-               mobj = re.search(r'<meta name="video_height" content="([0-9]+)" />', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract video height')
-                       return
-               yv_video_height = mobj.group(1)
-
-               mobj = re.search(r'<meta name="video_width" content="([0-9]+)" />', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract video width')
-                       return
-               yv_video_width = mobj.group(1)
-
-               # Retrieve video playlist to extract media URL
-               # I'm not completely sure what all these options are, but we
-               # seem to need most of them, otherwise the server sends a 401.
-               yv_lg = 'R0xx6idZnW2zlrKP8xxAIR'  # not sure what this represents
-               yv_bitrate = '700'  # according to Wikipedia this is hard-coded
-               request = urllib2.Request('http://cosmos.bcst.yahoo.com/up/yep/process/getPlaylistFOP.php?node_id=' + video_id +
-                               '&tech=flash&mode=playlist&lg=' + yv_lg + '&bitrate=' + yv_bitrate + '&vidH=' + yv_video_height +
-                               '&vidW=' + yv_video_width + '&swf=as3&rd=video.yahoo.com&tk=null&adsupported=v1,v2,&eventid=1301797')
-               try:
-                       self.report_download_webpage(video_id)
-                       webpage = urllib2.urlopen(request).read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % str(err))
-                       return
-
-               # Extract media URL from playlist XML
-               mobj = re.search(r'<STREAM APP="(http://.*)" FULLPATH="/?(/.*\.flv\?[^"]*)"', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: Unable to extract media URL')
-                       return
-               video_url = urllib.unquote(mobj.group(1) + mobj.group(2)).decode('utf-8')
-               video_url = re.sub(r'(?u)&(.+?);', htmlentity_transform, video_url)
-
-               try:
-                       # Process video information
-                       self._downloader.process_info({
-                               'id':           video_id.decode('utf-8'),
-                               'url':          video_url,
-                               'uploader':     video_uploader,
-                               'upload_date':  u'NA',
-                               'title':        video_title,
-                               'stitle':       simple_title,
-                               'ext':          video_extension.decode('utf-8'),
-                               'thumbnail':    video_thumbnail.decode('utf-8'),
-                               'description':  video_description,
-                               'thumbnail':    video_thumbnail,
-                               'player_url':   None,
-                       })
-               except UnavailableVideoError:
-                       self._downloader.trouble(u'\nERROR: unable to download video')
-
-
-class VimeoIE(InfoExtractor):
-       """Information extractor for vimeo.com."""
-
-       # _VALID_URL matches Vimeo URLs
-       _VALID_URL = r'(?:https?://)?(?:(?:www|player).)?vimeo\.com/(?:groups/[^/]+/)?(?:videos?/)?([0-9]+)'
-       IE_NAME = u'vimeo'
-
-       def __init__(self, downloader=None):
-               InfoExtractor.__init__(self, downloader)
-
-       def report_download_webpage(self, video_id):
-               """Report webpage download."""
-               self._downloader.to_screen(u'[vimeo] %s: Downloading webpage' % video_id)
-
-       def report_extraction(self, video_id):
-               """Report information extraction."""
-               self._downloader.to_screen(u'[vimeo] %s: Extracting information' % video_id)
-
-       def _real_initialize(self):
-               return
-
-       def _real_extract(self, url, new_video=True):
-               # Extract ID from URL
-               mobj = re.match(self._VALID_URL, url)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: Invalid URL: %s' % url)
-                       return
-
-               # At this point we have a new video
-               self._downloader.increment_downloads()
-               video_id = mobj.group(1)
-
-               # Retrieve video webpage to extract further information
-               request = urllib2.Request("http://vimeo.com/moogaloop/load/clip:%s" % video_id, None, std_headers)
-               try:
-                       self.report_download_webpage(video_id)
-                       webpage = urllib2.urlopen(request).read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % str(err))
-                       return
-
-               # Now we begin extracting as much information as we can from what we
-               # retrieved. First we extract the information common to all extractors,
-               # and latter we extract those that are Vimeo specific.
-               self.report_extraction(video_id)
-
-               # Extract title
-               mobj = re.search(r'<caption>(.*?)</caption>', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract video title')
-                       return
-               video_title = mobj.group(1).decode('utf-8')
-               simple_title = re.sub(ur'(?u)([^%s]+)' % simple_title_chars, ur'_', video_title)
-
-               # Extract uploader
-               mobj = re.search(r'<uploader_url>http://vimeo.com/(.*?)</uploader_url>', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract video uploader')
-                       return
-               video_uploader = mobj.group(1).decode('utf-8')
-
-               # Extract video thumbnail
-               mobj = re.search(r'<thumbnail>(.*?)</thumbnail>', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract video thumbnail')
-                       return
-               video_thumbnail = mobj.group(1).decode('utf-8')
-
-               # # Extract video description
-               # mobj = re.search(r'<meta property="og:description" content="(.*)" />', webpage)
-               # if mobj is None:
-               #       self._downloader.trouble(u'ERROR: unable to extract video description')
-               #       return
-               # video_description = mobj.group(1).decode('utf-8')
-               # if not video_description: video_description = 'No description available.'
-               video_description = 'Foo.'
-
-               # Vimeo specific: extract request signature
-               mobj = re.search(r'<request_signature>(.*?)</request_signature>', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract request signature')
-                       return
-               sig = mobj.group(1).decode('utf-8')
-
-               # Vimeo specific: extract video quality information
-               mobj = re.search(r'<isHD>(\d+)</isHD>', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract video quality information')
-                       return
-               quality = mobj.group(1).decode('utf-8')
-
-               if int(quality) == 1:
-                       quality = 'hd'
-               else:
-                       quality = 'sd'
-
-               # Vimeo specific: Extract request signature expiration
-               mobj = re.search(r'<request_signature_expires>(.*?)</request_signature_expires>', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract request signature expiration')
-                       return
-               sig_exp = mobj.group(1).decode('utf-8')
-
-               video_url = "http://vimeo.com/moogaloop/play/clip:%s/%s/%s/?q=%s" % (video_id, sig, sig_exp, quality)
-
-               try:
-                       # Process video information
-                       self._downloader.process_info({
-                               'id':           video_id.decode('utf-8'),
-                               'url':          video_url,
-                               'uploader':     video_uploader,
-                               'upload_date':  u'NA',
-                               'title':        video_title,
-                               'stitle':       simple_title,
-                               'ext':          u'mp4',
-                               'thumbnail':    video_thumbnail.decode('utf-8'),
-                               'description':  video_description,
-                               'thumbnail':    video_thumbnail,
-                               'description':  video_description,
-                               'player_url':   None,
-                       })
-               except UnavailableVideoError:
-                       self._downloader.trouble(u'ERROR: unable to download video')
-
-
-class GenericIE(InfoExtractor):
-       """Generic last-resort information extractor."""
-
-       _VALID_URL = r'.*'
-       IE_NAME = u'generic'
-
-       def __init__(self, downloader=None):
-               InfoExtractor.__init__(self, downloader)
-
-       def report_download_webpage(self, video_id):
-               """Report webpage download."""
-               self._downloader.to_screen(u'WARNING: Falling back on generic information extractor.')
-               self._downloader.to_screen(u'[generic] %s: Downloading webpage' % video_id)
-
-       def report_extraction(self, video_id):
-               """Report information extraction."""
-               self._downloader.to_screen(u'[generic] %s: Extracting information' % video_id)
-
-       def _real_initialize(self):
-               return
-
-       def _real_extract(self, url):
-               # At this point we have a new video
-               self._downloader.increment_downloads()
-
-               video_id = url.split('/')[-1]
-               request = urllib2.Request(url)
-               try:
-                       self.report_download_webpage(video_id)
-                       webpage = urllib2.urlopen(request).read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % str(err))
-                       return
-               except ValueError, err:
-                       # since this is the last-resort InfoExtractor, if
-                       # this error is thrown, it'll be thrown here
-                       self._downloader.trouble(u'ERROR: Invalid URL: %s' % url)
-                       return
-
-               self.report_extraction(video_id)
-               # Start with something easy: JW Player in SWFObject
-               mobj = re.search(r'flashvars: [\'"](?:.*&)?file=(http[^\'"&]*)', webpage)
-               if mobj is None:
-                       # Broaden the search a little bit
-                       mobj = re.search(r'[^A-Za-z0-9]?(?:file|source)=(http[^\'"&]*)', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: Invalid URL: %s' % url)
-                       return
-
-               # It's possible that one of the regexes
-               # matched, but returned an empty group:
-               if mobj.group(1) is None:
-                       self._downloader.trouble(u'ERROR: Invalid URL: %s' % url)
-                       return
-
-               video_url = urllib.unquote(mobj.group(1))
-               video_id = os.path.basename(video_url)
-
-               # here's a fun little line of code for you:
-               video_extension = os.path.splitext(video_id)[1][1:]
-               video_id = os.path.splitext(video_id)[0]
-
-               # it's tempting to parse this further, but you would
-               # have to take into account all the variations like
-               #   Video Title - Site Name
-               #   Site Name | Video Title
-               #   Video Title - Tagline | Site Name
-               # and so on and so forth; it's just not practical
-               mobj = re.search(r'<title>(.*)</title>', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract title')
-                       return
-               video_title = mobj.group(1).decode('utf-8')
-               video_title = sanitize_title(video_title)
-               simple_title = re.sub(ur'(?u)([^%s]+)' % simple_title_chars, ur'_', video_title)
-
-               # video uploader is domain name
-               mobj = re.match(r'(?:https?://)?([^/]*)/.*', url)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract title')
-                       return
-               video_uploader = mobj.group(1).decode('utf-8')
-
-               try:
-                       # Process video information
-                       self._downloader.process_info({
-                               'id':           video_id.decode('utf-8'),
-                               'url':          video_url.decode('utf-8'),
-                               'uploader':     video_uploader,
-                               'upload_date':  u'NA',
-                               'title':        video_title,
-                               'stitle':       simple_title,
-                               'ext':          video_extension.decode('utf-8'),
-                               'format':       u'NA',
-                               'player_url':   None,
-                       })
-               except UnavailableVideoError, err:
-                       self._downloader.trouble(u'\nERROR: unable to download video')
-
-
-class YoutubeSearchIE(InfoExtractor):
-       """Information Extractor for YouTube search queries."""
-       _VALID_URL = r'ytsearch(\d+|all)?:[\s\S]+'
-       _TEMPLATE_URL = 'http://www.youtube.com/results?search_query=%s&page=%s&gl=US&hl=en'
-       _VIDEO_INDICATOR = r'href="/watch\?v=.+?"'
-       _MORE_PAGES_INDICATOR = r'(?m)>\s*Next\s*</a>'
-       _youtube_ie = None
-       _max_youtube_results = 1000
-       IE_NAME = u'youtube:search'
-
-       def __init__(self, youtube_ie, downloader=None):
-               InfoExtractor.__init__(self, downloader)
-               self._youtube_ie = youtube_ie
-
-       def report_download_page(self, query, pagenum):
-               """Report attempt to download playlist page with given number."""
-               query = query.decode(preferredencoding())
-               self._downloader.to_screen(u'[youtube] query "%s": Downloading page %s' % (query, pagenum))
-
-       def _real_initialize(self):
-               self._youtube_ie.initialize()
-
-       def _real_extract(self, query):
-               mobj = re.match(self._VALID_URL, query)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: invalid search query "%s"' % query)
-                       return
-
-               prefix, query = query.split(':')
-               prefix = prefix[8:]
-               query = query.encode('utf-8')
-               if prefix == '':
-                       self._download_n_results(query, 1)
-                       return
-               elif prefix == 'all':
-                       self._download_n_results(query, self._max_youtube_results)
-                       return
-               else:
-                       try:
-                               n = long(prefix)
-                               if n <= 0:
-                                       self._downloader.trouble(u'ERROR: invalid download number %s for query "%s"' % (n, query))
-                                       return
-                               elif n > self._max_youtube_results:
-                                       self._downloader.to_stderr(u'WARNING: ytsearch returns max %i results (you requested %i)' % (self._max_youtube_results, n))
-                                       n = self._max_youtube_results
-                               self._download_n_results(query, n)
-                               return
-                       except ValueError: # parsing prefix as integer fails
-                               self._download_n_results(query, 1)
-                               return
-
-       def _download_n_results(self, query, n):
-               """Downloads a specified number of results for a query"""
-
-               video_ids = []
-               already_seen = set()
-               pagenum = 1
-
-               while True:
-                       self.report_download_page(query, pagenum)
-                       result_url = self._TEMPLATE_URL % (urllib.quote_plus(query), pagenum)
-                       request = urllib2.Request(result_url)
-                       try:
-                               page = urllib2.urlopen(request).read()
-                       except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                               self._downloader.trouble(u'ERROR: unable to download webpage: %s' % str(err))
-                               return
-
-                       # Extract video identifiers
-                       for mobj in re.finditer(self._VIDEO_INDICATOR, page):
-                               video_id = page[mobj.span()[0]:mobj.span()[1]].split('=')[2][:-1]
-                               if video_id not in already_seen:
-                                       video_ids.append(video_id)
-                                       already_seen.add(video_id)
-                                       if len(video_ids) == n:
-                                               # Specified n videos reached
-                                               for id in video_ids:
-                                                       self._youtube_ie.extract('http://www.youtube.com/watch?v=%s' % id)
-                                               return
-
-                       if re.search(self._MORE_PAGES_INDICATOR, page) is None:
-                               for id in video_ids:
-                                       self._youtube_ie.extract('http://www.youtube.com/watch?v=%s' % id)
-                               return
-
-                       pagenum = pagenum + 1
-
-
-class GoogleSearchIE(InfoExtractor):
-       """Information Extractor for Google Video search queries."""
-       _VALID_URL = r'gvsearch(\d+|all)?:[\s\S]+'
-       _TEMPLATE_URL = 'http://video.google.com/videosearch?q=%s+site:video.google.com&start=%s&hl=en'
-       _VIDEO_INDICATOR = r'videoplay\?docid=([^\&>]+)\&'
-       _MORE_PAGES_INDICATOR = r'<span>Next</span>'
-       _google_ie = None
-       _max_google_results = 1000
-       IE_NAME = u'video.google:search'
-
-       def __init__(self, google_ie, downloader=None):
-               InfoExtractor.__init__(self, downloader)
-               self._google_ie = google_ie
-
-       def report_download_page(self, query, pagenum):
-               """Report attempt to download playlist page with given number."""
-               query = query.decode(preferredencoding())
-               self._downloader.to_screen(u'[video.google] query "%s": Downloading page %s' % (query, pagenum))
-
-       def _real_initialize(self):
-               self._google_ie.initialize()
-
-       def _real_extract(self, query):
-               mobj = re.match(self._VALID_URL, query)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: invalid search query "%s"' % query)
-                       return
-
-               prefix, query = query.split(':')
-               prefix = prefix[8:]
-               query = query.encode('utf-8')
-               if prefix == '':
-                       self._download_n_results(query, 1)
-                       return
-               elif prefix == 'all':
-                       self._download_n_results(query, self._max_google_results)
-                       return
-               else:
-                       try:
-                               n = long(prefix)
-                               if n <= 0:
-                                       self._downloader.trouble(u'ERROR: invalid download number %s for query "%s"' % (n, query))
-                                       return
-                               elif n > self._max_google_results:
-                                       self._downloader.to_stderr(u'WARNING: gvsearch returns max %i results (you requested %i)' % (self._max_google_results, n))
-                                       n = self._max_google_results
-                               self._download_n_results(query, n)
-                               return
-                       except ValueError: # parsing prefix as integer fails
-                               self._download_n_results(query, 1)
-                               return
-
-       def _download_n_results(self, query, n):
-               """Downloads a specified number of results for a query"""
-
-               video_ids = []
-               already_seen = set()
-               pagenum = 1
-
-               while True:
-                       self.report_download_page(query, pagenum)
-                       result_url = self._TEMPLATE_URL % (urllib.quote_plus(query), pagenum)
-                       request = urllib2.Request(result_url)
-                       try:
-                               page = urllib2.urlopen(request).read()
-                       except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                               self._downloader.trouble(u'ERROR: unable to download webpage: %s' % str(err))
-                               return
-
-                       # Extract video identifiers
-                       for mobj in re.finditer(self._VIDEO_INDICATOR, page):
-                               video_id = mobj.group(1)
-                               if video_id not in already_seen:
-                                       video_ids.append(video_id)
-                                       already_seen.add(video_id)
-                                       if len(video_ids) == n:
-                                               # Specified n videos reached
-                                               for id in video_ids:
-                                                       self._google_ie.extract('http://video.google.com/videoplay?docid=%s' % id)
-                                               return
-
-                       if re.search(self._MORE_PAGES_INDICATOR, page) is None:
-                               for id in video_ids:
-                                       self._google_ie.extract('http://video.google.com/videoplay?docid=%s' % id)
-                               return
-
-                       pagenum = pagenum + 1
-
-
-class YahooSearchIE(InfoExtractor):
-       """Information Extractor for Yahoo! Video search queries."""
-       _VALID_URL = r'yvsearch(\d+|all)?:[\s\S]+'
-       _TEMPLATE_URL = 'http://video.yahoo.com/search/?p=%s&o=%s'
-       _VIDEO_INDICATOR = r'href="http://video\.yahoo\.com/watch/([0-9]+/[0-9]+)"'
-       _MORE_PAGES_INDICATOR = r'\s*Next'
-       _yahoo_ie = None
-       _max_yahoo_results = 1000
-       IE_NAME = u'video.yahoo:search'
-
-       def __init__(self, yahoo_ie, downloader=None):
-               InfoExtractor.__init__(self, downloader)
-               self._yahoo_ie = yahoo_ie
-
-       def report_download_page(self, query, pagenum):
-               """Report attempt to download playlist page with given number."""
-               query = query.decode(preferredencoding())
-               self._downloader.to_screen(u'[video.yahoo] query "%s": Downloading page %s' % (query, pagenum))
-
-       def _real_initialize(self):
-               self._yahoo_ie.initialize()
-
-       def _real_extract(self, query):
-               mobj = re.match(self._VALID_URL, query)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: invalid search query "%s"' % query)
-                       return
-
-               prefix, query = query.split(':')
-               prefix = prefix[8:]
-               query = query.encode('utf-8')
-               if prefix == '':
-                       self._download_n_results(query, 1)
-                       return
-               elif prefix == 'all':
-                       self._download_n_results(query, self._max_yahoo_results)
-                       return
-               else:
-                       try:
-                               n = long(prefix)
-                               if n <= 0:
-                                       self._downloader.trouble(u'ERROR: invalid download number %s for query "%s"' % (n, query))
-                                       return
-                               elif n > self._max_yahoo_results:
-                                       self._downloader.to_stderr(u'WARNING: yvsearch returns max %i results (you requested %i)' % (self._max_yahoo_results, n))
-                                       n = self._max_yahoo_results
-                               self._download_n_results(query, n)
-                               return
-                       except ValueError: # parsing prefix as integer fails
-                               self._download_n_results(query, 1)
-                               return
-
-       def _download_n_results(self, query, n):
-               """Downloads a specified number of results for a query"""
-
-               video_ids = []
-               already_seen = set()
-               pagenum = 1
-
-               while True:
-                       self.report_download_page(query, pagenum)
-                       result_url = self._TEMPLATE_URL % (urllib.quote_plus(query), pagenum)
-                       request = urllib2.Request(result_url)
-                       try:
-                               page = urllib2.urlopen(request).read()
-                       except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                               self._downloader.trouble(u'ERROR: unable to download webpage: %s' % str(err))
-                               return
-
-                       # Extract video identifiers
-                       for mobj in re.finditer(self._VIDEO_INDICATOR, page):
-                               video_id = mobj.group(1)
-                               if video_id not in already_seen:
-                                       video_ids.append(video_id)
-                                       already_seen.add(video_id)
-                                       if len(video_ids) == n:
-                                               # Specified n videos reached
-                                               for id in video_ids:
-                                                       self._yahoo_ie.extract('http://video.yahoo.com/watch/%s' % id)
-                                               return
-
-                       if re.search(self._MORE_PAGES_INDICATOR, page) is None:
-                               for id in video_ids:
-                                       self._yahoo_ie.extract('http://video.yahoo.com/watch/%s' % id)
-                               return
-
-                       pagenum = pagenum + 1
-
-
-class YoutubePlaylistIE(InfoExtractor):
-       """Information Extractor for YouTube playlists."""
-
-       _VALID_URL = r'(?:https?://)?(?:\w+\.)?youtube\.com/(?:(?:course|view_play_list|my_playlists|artist|playlist)\?.*?(p|a|list)=|user/.*?/user/|p/|user/.*?#[pg]/c/)(?:PL)?([0-9A-Za-z]+)(?:/.*?/([0-9A-Za-z_-]+))?.*'
-       _TEMPLATE_URL = 'http://www.youtube.com/%s?%s=%s&page=%s&gl=US&hl=en'
-       _VIDEO_INDICATOR = r'/watch\?v=(.+?)&'
-       _MORE_PAGES_INDICATOR = r'(?m)>\s*Next\s*</a>'
-       _youtube_ie = None
-       IE_NAME = u'youtube:playlist'
-
-       def __init__(self, youtube_ie, downloader=None):
-               InfoExtractor.__init__(self, downloader)
-               self._youtube_ie = youtube_ie
-
-       def report_download_page(self, playlist_id, pagenum):
-               """Report attempt to download playlist page with given number."""
-               self._downloader.to_screen(u'[youtube] PL %s: Downloading page #%s' % (playlist_id, pagenum))
-
-       def _real_initialize(self):
-               self._youtube_ie.initialize()
-
-       def _real_extract(self, url):
-               # Extract playlist id
-               mobj = re.match(self._VALID_URL, url)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: invalid url: %s' % url)
-                       return
-
-               # Single video case
-               if mobj.group(3) is not None:
-                       self._youtube_ie.extract(mobj.group(3))
-                       return
-
-               # Download playlist pages
-               # prefix is 'p' as default for playlists but there are other types that need extra care
-               playlist_prefix = mobj.group(1)
-               if playlist_prefix == 'a':
-                       playlist_access = 'artist'
-               else:
-                       playlist_prefix = 'p'
-                       playlist_access = 'view_play_list'
-               playlist_id = mobj.group(2)
-               video_ids = []
-               pagenum = 1
-
-               while True:
-                       self.report_download_page(playlist_id, pagenum)
-                       request = urllib2.Request(self._TEMPLATE_URL % (playlist_access, playlist_prefix, playlist_id, pagenum))
-                       try:
-                               page = urllib2.urlopen(request).read()
-                       except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                               self._downloader.trouble(u'ERROR: unable to download webpage: %s' % str(err))
-                               return
-
-                       # Extract video identifiers
-                       ids_in_page = []
-                       for mobj in re.finditer(self._VIDEO_INDICATOR, page):
-                               if mobj.group(1) not in ids_in_page:
-                                       ids_in_page.append(mobj.group(1))
-                       video_ids.extend(ids_in_page)
-
-                       if re.search(self._MORE_PAGES_INDICATOR, page) is None:
-                               break
-                       pagenum = pagenum + 1
-
-               playliststart = self._downloader.params.get('playliststart', 1) - 1
-               playlistend = self._downloader.params.get('playlistend', -1)
-               video_ids = video_ids[playliststart:playlistend]
-
-               for id in video_ids:
-                       self._youtube_ie.extract('http://www.youtube.com/watch?v=%s' % id)
-               return
-
-
-class YoutubeUserIE(InfoExtractor):
-       """Information Extractor for YouTube users."""
-
-       _VALID_URL = r'(?:(?:(?:https?://)?(?:\w+\.)?youtube\.com/user/)|ytuser:)([A-Za-z0-9_-]+)'
-       _TEMPLATE_URL = 'http://gdata.youtube.com/feeds/api/users/%s'
-       _GDATA_PAGE_SIZE = 50
-       _GDATA_URL = 'http://gdata.youtube.com/feeds/api/users/%s/uploads?max-results=%d&start-index=%d'
-       _VIDEO_INDICATOR = r'/watch\?v=(.+?)&'
-       _youtube_ie = None
-       IE_NAME = u'youtube:user'
-
-       def __init__(self, youtube_ie, downloader=None):
-               InfoExtractor.__init__(self, downloader)
-               self._youtube_ie = youtube_ie
-
-       def report_download_page(self, username, start_index):
-               """Report attempt to download user page."""
-               self._downloader.to_screen(u'[youtube] user %s: Downloading video ids from %d to %d' %
-                               (username, start_index, start_index + self._GDATA_PAGE_SIZE))
-
-       def _real_initialize(self):
-               self._youtube_ie.initialize()
-
-       def _real_extract(self, url):
-               # Extract username
-               mobj = re.match(self._VALID_URL, url)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: invalid url: %s' % url)
-                       return
-
-               username = mobj.group(1)
-
-               # Download video ids using YouTube Data API. Result size per
-               # query is limited (currently to 50 videos) so we need to query
-               # page by page until there are no video ids - it means we got
-               # all of them.
-
-               video_ids = []
-               pagenum = 0
-
-               while True:
-                       start_index = pagenum * self._GDATA_PAGE_SIZE + 1
-                       self.report_download_page(username, start_index)
-
-                       request = urllib2.Request(self._GDATA_URL % (username, self._GDATA_PAGE_SIZE, start_index))
-
-                       try:
-                               page = urllib2.urlopen(request).read()
-                       except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                               self._downloader.trouble(u'ERROR: unable to download webpage: %s' % str(err))
-                               return
-
-                       # Extract video identifiers
-                       ids_in_page = []
-
-                       for mobj in re.finditer(self._VIDEO_INDICATOR, page):
-                               if mobj.group(1) not in ids_in_page:
-                                       ids_in_page.append(mobj.group(1))
-
-                       video_ids.extend(ids_in_page)
-
-                       # A little optimization - if current page is not
-                       # "full", ie. does not contain PAGE_SIZE video ids then
-                       # we can assume that this page is the last one - there
-                       # are no more ids on further pages - no need to query
-                       # again.
-
-                       if len(ids_in_page) < self._GDATA_PAGE_SIZE:
-                               break
-
-                       pagenum += 1
-
-               all_ids_count = len(video_ids)
-               playliststart = self._downloader.params.get('playliststart', 1) - 1
-               playlistend = self._downloader.params.get('playlistend', -1)
-
-               if playlistend == -1:
-                       video_ids = video_ids[playliststart:]
-               else:
-                       video_ids = video_ids[playliststart:playlistend]
-
-               self._downloader.to_screen("[youtube] user %s: Collected %d video ids (downloading %d of them)" %
-                               (username, all_ids_count, len(video_ids)))
-
-               for video_id in video_ids:
-                       self._youtube_ie.extract('http://www.youtube.com/watch?v=%s' % video_id)
-
-
-class DepositFilesIE(InfoExtractor):
-       """Information extractor for depositfiles.com"""
-
-       _VALID_URL = r'(?:http://)?(?:\w+\.)?depositfiles\.com/(?:../(?#locale))?files/(.+)'
-       IE_NAME = u'DepositFiles'
-
-       def __init__(self, downloader=None):
-               InfoExtractor.__init__(self, downloader)
-
-       def report_download_webpage(self, file_id):
-               """Report webpage download."""
-               self._downloader.to_screen(u'[DepositFiles] %s: Downloading webpage' % file_id)
-
-       def report_extraction(self, file_id):
-               """Report information extraction."""
-               self._downloader.to_screen(u'[DepositFiles] %s: Extracting information' % file_id)
-
-       def _real_initialize(self):
-               return
-
-       def _real_extract(self, url):
-               # At this point we have a new file
-               self._downloader.increment_downloads()
-
-               file_id = url.split('/')[-1]
-               # Rebuild url in english locale
-               url = 'http://depositfiles.com/en/files/' + file_id
-
-               # Retrieve file webpage with 'Free download' button pressed
-               free_download_indication = { 'gateway_result' : '1' }
-               request = urllib2.Request(url, urllib.urlencode(free_download_indication))
-               try:
-                       self.report_download_webpage(file_id)
-                       webpage = urllib2.urlopen(request).read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self._downloader.trouble(u'ERROR: Unable to retrieve file webpage: %s' % str(err))
-                       return
-
-               # Search for the real file URL
-               mobj = re.search(r'<form action="(http://fileshare.+?)"', webpage)
-               if (mobj is None) or (mobj.group(1) is None):
-                       # Try to figure out reason of the error.
-                       mobj = re.search(r'<strong>(Attention.*?)</strong>', webpage, re.DOTALL)
-                       if (mobj is not None) and (mobj.group(1) is not None):
-                               restriction_message = re.sub('\s+', ' ', mobj.group(1)).strip()
-                               self._downloader.trouble(u'ERROR: %s' % restriction_message)
-                       else:
-                               self._downloader.trouble(u'ERROR: unable to extract download URL from: %s' % url)
-                       return
-
-               file_url = mobj.group(1)
-               file_extension = os.path.splitext(file_url)[1][1:]
-
-               # Search for file title
-               mobj = re.search(r'<b title="(.*?)">', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract title')
-                       return
-               file_title = mobj.group(1).decode('utf-8')
-
-               try:
-                       # Process file information
-                       self._downloader.process_info({
-                               'id':           file_id.decode('utf-8'),
-                               'url':          file_url.decode('utf-8'),
-                               'uploader':     u'NA',
-                               'upload_date':  u'NA',
-                               'title':        file_title,
-                               'stitle':       file_title,
-                               'ext':          file_extension.decode('utf-8'),
-                               'format':       u'NA',
-                               'player_url':   None,
-                       })
-               except UnavailableVideoError, err:
-                       self._downloader.trouble(u'ERROR: unable to download file')
-
-
-class FacebookIE(InfoExtractor):
-       """Information Extractor for Facebook"""
-
-       _VALID_URL = r'^(?:https?://)?(?:\w+\.)?facebook\.com/video/video\.php\?(?:.*?)v=(?P<ID>\d+)(?:.*)'
-       _LOGIN_URL = 'https://login.facebook.com/login.php?m&next=http%3A%2F%2Fm.facebook.com%2Fhome.php&'
-       _NETRC_MACHINE = 'facebook'
-       _available_formats = ['highqual', 'lowqual']
-       _video_extensions = {
-               'highqual': 'mp4',
-               'lowqual': 'mp4',
-       }
-       IE_NAME = u'facebook'
-
-       def __init__(self, downloader=None):
-               InfoExtractor.__init__(self, downloader)
-
-       def _reporter(self, message):
-               """Add header and report message."""
-               self._downloader.to_screen(u'[facebook] %s' % message)
-
-       def report_login(self):
-               """Report attempt to log in."""
-               self._reporter(u'Logging in')
-
-       def report_video_webpage_download(self, video_id):
-               """Report attempt to download video webpage."""
-               self._reporter(u'%s: Downloading video webpage' % video_id)
-
-       def report_information_extraction(self, video_id):
-               """Report attempt to extract video information."""
-               self._reporter(u'%s: Extracting video information' % video_id)
-
-       def _parse_page(self, video_webpage):
-               """Extract video information from page"""
-               # General data
-               data = {'title': r'class="video_title datawrap">(.*?)</',
-                       'description': r'<div class="datawrap">(.*?)</div>',
-                       'owner': r'\("video_owner_name", "(.*?)"\)',
-                       'upload_date': r'data-date="(.*?)"',
-                       'thumbnail':  r'\("thumb_url", "(?P<THUMB>.*?)"\)',
-                       }
-               video_info = {}
-               for piece in data.keys():
-                       mobj = re.search(data[piece], video_webpage)
-                       if mobj is not None:
-                               video_info[piece] = urllib.unquote_plus(mobj.group(1).decode("unicode_escape"))
-
-               # Video urls
-               video_urls = {}
-               for fmt in self._available_formats:
-                       mobj = re.search(r'\("%s_src\", "(.+?)"\)' % fmt, video_webpage)
-                       if mobj is not None:
-                               # URL is in a Javascript segment inside an escaped Unicode format within
-                               # the generally utf-8 page
-                               video_urls[fmt] = urllib.unquote_plus(mobj.group(1).decode("unicode_escape"))
-               video_info['video_urls'] = video_urls
-
-               return video_info
-
-       def _real_initialize(self):
-               if self._downloader is None:
-                       return
-
-               useremail = None
-               password = None
-               downloader_params = self._downloader.params
-
-               # Attempt to use provided username and password or .netrc data
-               if downloader_params.get('username', None) is not None:
-                       useremail = downloader_params['username']
-                       password = downloader_params['password']
-               elif downloader_params.get('usenetrc', False):
-                       try:
-                               info = netrc.netrc().authenticators(self._NETRC_MACHINE)
-                               if info is not None:
-                                       useremail = info[0]
-                                       password = info[2]
-                               else:
-                                       raise netrc.NetrcParseError('No authenticators for %s' % self._NETRC_MACHINE)
-                       except (IOError, netrc.NetrcParseError), err:
-                               self._downloader.to_stderr(u'WARNING: parsing .netrc: %s' % str(err))
-                               return
-
-               if useremail is None:
-                       return
-
-               # Log in
-               login_form = {
-                       'email': useremail,
-                       'pass': password,
-                       'login': 'Log+In'
-                       }
-               request = urllib2.Request(self._LOGIN_URL, urllib.urlencode(login_form))
-               try:
-                       self.report_login()
-                       login_results = urllib2.urlopen(request).read()
-                       if re.search(r'<form(.*)name="login"(.*)</form>', login_results) is not None:
-                               self._downloader.to_stderr(u'WARNING: unable to log in: bad username/password, or exceded login rate limit (~3/min). Check credentials or wait.')
-                               return
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self._downloader.to_stderr(u'WARNING: unable to log in: %s' % str(err))
-                       return
-
-       def _real_extract(self, url):
-               mobj = re.match(self._VALID_URL, url)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: invalid URL: %s' % url)
-                       return
-               video_id = mobj.group('ID')
-
-               # Get video webpage
-               self.report_video_webpage_download(video_id)
-               request = urllib2.Request('https://www.facebook.com/video/video.php?v=%s' % video_id)
-               try:
-                       page = urllib2.urlopen(request)
-                       video_webpage = page.read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self._downloader.trouble(u'ERROR: unable to download video webpage: %s' % str(err))
-                       return
-
-               # Start extracting information
-               self.report_information_extraction(video_id)
-
-               # Extract information
-               video_info = self._parse_page(video_webpage)
-
-               # uploader
-               if 'owner' not in video_info:
-                       self._downloader.trouble(u'ERROR: unable to extract uploader nickname')
-                       return
-               video_uploader = video_info['owner']
-
-               # title
-               if 'title' not in video_info:
-                       self._downloader.trouble(u'ERROR: unable to extract video title')
-                       return
-               video_title = video_info['title']
-               video_title = video_title.decode('utf-8')
-               video_title = sanitize_title(video_title)
-
-               # simplified title
-               simple_title = re.sub(ur'(?u)([^%s]+)' % simple_title_chars, ur'_', video_title)
-               simple_title = simple_title.strip(ur'_')
-
-               # thumbnail image
-               if 'thumbnail' not in video_info:
-                       self._downloader.trouble(u'WARNING: unable to extract video thumbnail')
-                       video_thumbnail = ''
-               else:
-                       video_thumbnail = video_info['thumbnail']
-
-               # upload date
-               upload_date = u'NA'
-               if 'upload_date' in video_info:
-                       upload_time = video_info['upload_date']
-                       timetuple = email.utils.parsedate_tz(upload_time)
-                       if timetuple is not None:
-                               try:
-                                       upload_date = time.strftime('%Y%m%d', timetuple[0:9])
-                               except:
-                                       pass
-
-               # description
-               video_description = video_info.get('description', 'No description available.')
-
-               url_map = video_info['video_urls']
-               if len(url_map.keys()) > 0:
-                       # Decide which formats to download
-                       req_format = self._downloader.params.get('format', None)
-                       format_limit = self._downloader.params.get('format_limit', None)
-
-                       if format_limit is not None and format_limit in self._available_formats:
-                               format_list = self._available_formats[self._available_formats.index(format_limit):]
-                       else:
-                               format_list = self._available_formats
-                       existing_formats = [x for x in format_list if x in url_map]
-                       if len(existing_formats) == 0:
-                               self._downloader.trouble(u'ERROR: no known formats available for video')
-                               return
-                       if req_format is None:
-                               video_url_list = [(existing_formats[0], url_map[existing_formats[0]])] # Best quality
-                       elif req_format == 'worst':
-                               video_url_list = [(existing_formats[len(existing_formats)-1], url_map[existing_formats[len(existing_formats)-1]])] # worst quality
-                       elif req_format == '-1':
-                               video_url_list = [(f, url_map[f]) for f in existing_formats] # All formats
-                       else:
-                               # Specific format
-                               if req_format not in url_map:
-                                       self._downloader.trouble(u'ERROR: requested format not available')
-                                       return
-                               video_url_list = [(req_format, url_map[req_format])] # Specific format
-
-               for format_param, video_real_url in video_url_list:
-
-                       # At this point we have a new video
-                       self._downloader.increment_downloads()
-
-                       # Extension
-                       video_extension = self._video_extensions.get(format_param, 'mp4')
-
-                       try:
-                               # Process video information
-                               self._downloader.process_info({
-                                       'id':           video_id.decode('utf-8'),
-                                       'url':          video_real_url.decode('utf-8'),
-                                       'uploader':     video_uploader.decode('utf-8'),
-                                       'upload_date':  upload_date,
-                                       'title':        video_title,
-                                       'stitle':       simple_title,
-                                       'ext':          video_extension.decode('utf-8'),
-                                       'format':       (format_param is None and u'NA' or format_param.decode('utf-8')),
-                                       'thumbnail':    video_thumbnail.decode('utf-8'),
-                                       'description':  video_description.decode('utf-8'),
-                                       'player_url':   None,
-                               })
-                       except UnavailableVideoError, err:
-                               self._downloader.trouble(u'\nERROR: unable to download video')
-
-class BlipTVIE(InfoExtractor):
-       """Information extractor for blip.tv"""
-
-       _VALID_URL = r'^(?:https?://)?(?:\w+\.)?blip\.tv(/.+)$'
-       _URL_EXT = r'^.*\.([a-z0-9]+)$'
-       IE_NAME = u'blip.tv'
-
-       def report_extraction(self, file_id):
-               """Report information extraction."""
-               self._downloader.to_screen(u'[%s] %s: Extracting information' % (self.IE_NAME, file_id))
-
-       def report_direct_download(self, title):
-               """Report information extraction."""
-               self._downloader.to_screen(u'[%s] %s: Direct download detected' % (self.IE_NAME, title))
-
-       def _simplify_title(self, title):
-               res = re.sub(ur'(?u)([^%s]+)' % simple_title_chars, ur'_', title)
-               res = res.strip(ur'_')
-               return res
-
-       def _real_extract(self, url):
-               mobj = re.match(self._VALID_URL, url)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: invalid URL: %s' % url)
-                       return
-
-               if '?' in url:
-                       cchar = '&'
-               else:
-                       cchar = '?'
-               json_url = url + cchar + 'skin=json&version=2&no_wrap=1'
-               request = urllib2.Request(json_url)
-               self.report_extraction(mobj.group(1))
-               info = None
-               try:
-                       urlh = urllib2.urlopen(request)
-                       if urlh.headers.get('Content-Type', '').startswith('video/'): # Direct download
-                               basename = url.split('/')[-1]
-                               title,ext = os.path.splitext(basename)
-                               ext = ext.replace('.', '')
-                               self.report_direct_download(title)
-                               info = {
-                                       'id': title,
-                                       'url': url,
-                                       'title': title,
-                                       'stitle': self._simplify_title(title),
-                                       'ext': ext,
-                                       'urlhandle': urlh
-                               }
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self._downloader.trouble(u'ERROR: unable to download video info webpage: %s' % str(err))
-                       return
-               if info is None: # Regular URL
-                       try:
-                               json_code = urlh.read()
-                       except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                               self._downloader.trouble(u'ERROR: unable to read video info webpage: %s' % str(err))
-                               return
-
-                       try:
-                               json_data = json.loads(json_code)
-                               if 'Post' in json_data:
-                                       data = json_data['Post']
-                               else:
-                                       data = json_data
-       
-                               upload_date = datetime.datetime.strptime(data['datestamp'], '%m-%d-%y %H:%M%p').strftime('%Y%m%d')
-                               video_url = data['media']['url']
-                               umobj = re.match(self._URL_EXT, video_url)
-                               if umobj is None:
-                                       raise ValueError('Can not determine filename extension')
-                               ext = umobj.group(1)
-       
-                               info = {
-                                       'id': data['item_id'],
-                                       'url': video_url,
-                                       'uploader': data['display_name'],
-                                       'upload_date': upload_date,
-                                       'title': data['title'],
-                                       'stitle': self._simplify_title(data['title']),
-                                       'ext': ext,
-                                       'format': data['media']['mimeType'],
-                                       'thumbnail': data['thumbnailUrl'],
-                                       'description': data['description'],
-                                       'player_url': data['embedUrl']
-                               }
-                       except (ValueError,KeyError), err:
-                               self._downloader.trouble(u'ERROR: unable to parse video information: %s' % repr(err))
-                               return
-
-               self._downloader.increment_downloads()
-
-               try:
-                       self._downloader.process_info(info)
-               except UnavailableVideoError, err:
-                       self._downloader.trouble(u'\nERROR: unable to download video')
-
-
-class MyVideoIE(InfoExtractor):
-       """Information Extractor for myvideo.de."""
-
-       _VALID_URL = r'(?:http://)?(?:www\.)?myvideo\.de/watch/([0-9]+)/([^?/]+).*'
-       IE_NAME = u'myvideo'
-
-       def __init__(self, downloader=None):
-               InfoExtractor.__init__(self, downloader)
-       
-       def report_download_webpage(self, video_id):
-               """Report webpage download."""
-               self._downloader.to_screen(u'[myvideo] %s: Downloading webpage' % video_id)
-
-       def report_extraction(self, video_id):
-               """Report information extraction."""
-               self._downloader.to_screen(u'[myvideo] %s: Extracting information' % video_id)
-
-       def _real_initialize(self):
-               return
-
-       def _real_extract(self,url):
-               mobj = re.match(self._VALID_URL, url)
-               if mobj is None:
-                       self._download.trouble(u'ERROR: invalid URL: %s' % url)
-                       return
-
-               video_id = mobj.group(1)
-               simple_title = mobj.group(2).decode('utf-8')
-               # should actually not be necessary
-               simple_title = sanitize_title(simple_title)
-               simple_title = re.sub(ur'(?u)([^%s]+)' % simple_title_chars, ur'_', simple_title)
-
-               # Get video webpage
-               request = urllib2.Request('http://www.myvideo.de/watch/%s' % video_id)
-               try:
-                       self.report_download_webpage(video_id)
-                       webpage = urllib2.urlopen(request).read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % str(err))
-                       return
-
-               self.report_extraction(video_id)
-               mobj = re.search(r'<link rel=\'image_src\' href=\'(http://is[0-9].myvideo\.de/de/movie[0-9]+/[a-f0-9]+)/thumbs/[^.]+\.jpg\' />',
-                                webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract media URL')
-                       return
-               video_url = mobj.group(1) + ('/%s.flv' % video_id)
-
-               mobj = re.search('<title>([^<]+)</title>', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract title')
-                       return
-
-               video_title = mobj.group(1)
-               video_title = sanitize_title(video_title)
-
-               try:
-                       self._downloader.process_info({
-                               'id':           video_id,
-                               'url':          video_url,
-                               'uploader':     u'NA',
-                               'upload_date':  u'NA',
-                               'title':        video_title,
-                               'stitle':       simple_title,
-                               'ext':          u'flv',
-                               'format':       u'NA',
-                               'player_url':   None,
-                       })
-               except UnavailableVideoError:
-                       self._downloader.trouble(u'\nERROR: Unable to download video')
-
-class ComedyCentralIE(InfoExtractor):
-       """Information extractor for The Daily Show and Colbert Report """
-
-       _VALID_URL = r'^(:(?P<shortname>tds|thedailyshow|cr|colbert|colbertnation|colbertreport))|(https?://)?(www\.)?(?P<showname>thedailyshow|colbertnation)\.com/full-episodes/(?P<episode>.*)$'
-       IE_NAME = u'comedycentral'
-
-       def report_extraction(self, episode_id):
-               self._downloader.to_screen(u'[comedycentral] %s: Extracting information' % episode_id)
-       
-       def report_config_download(self, episode_id):
-               self._downloader.to_screen(u'[comedycentral] %s: Downloading configuration' % episode_id)
-
-       def report_index_download(self, episode_id):
-               self._downloader.to_screen(u'[comedycentral] %s: Downloading show index' % episode_id)
-
-       def report_player_url(self, episode_id):
-               self._downloader.to_screen(u'[comedycentral] %s: Determining player URL' % episode_id)
-
-       def _simplify_title(self, title):
-               res = re.sub(ur'(?u)([^%s]+)' % simple_title_chars, ur'_', title)
-               res = res.strip(ur'_')
-               return res
-
-       def _real_extract(self, url):
-               mobj = re.match(self._VALID_URL, url)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: invalid URL: %s' % url)
-                       return
-
-               if mobj.group('shortname'):
-                       if mobj.group('shortname') in ('tds', 'thedailyshow'):
-                               url = 'http://www.thedailyshow.com/full-episodes/'
-                       else:
-                               url = 'http://www.colbertnation.com/full-episodes/'
-                       mobj = re.match(self._VALID_URL, url)
-                       assert mobj is not None
-
-               dlNewest = not mobj.group('episode')
-               if dlNewest:
-                       epTitle = mobj.group('showname')
-               else:
-                       epTitle = mobj.group('episode')
-
-               req = urllib2.Request(url)
-               self.report_extraction(epTitle)
-               try:
-                       htmlHandle = urllib2.urlopen(req)
-                       html = htmlHandle.read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self._downloader.trouble(u'ERROR: unable to download webpage: %s' % unicode(err))
-                       return
-               if dlNewest:
-                       url = htmlHandle.geturl()
-                       mobj = re.match(self._VALID_URL, url)
-                       if mobj is None:
-                               self._downloader.trouble(u'ERROR: Invalid redirected URL: ' + url)
-                               return
-                       if mobj.group('episode') == '':
-                               self._downloader.trouble(u'ERROR: Redirected URL is still not specific: ' + url)
-                               return
-                       epTitle = mobj.group('episode')
-
-               mMovieParams = re.findall('<param name="movie" value="(http://media.mtvnservices.com/([^"]*episode.*?:.*?))"/>', html)
-               if len(mMovieParams) == 0:
-                       self._downloader.trouble(u'ERROR: unable to find Flash URL in webpage ' + url)
-                       return
-
-               playerUrl_raw = mMovieParams[0][0]
-               self.report_player_url(epTitle)
-               try:
-                       urlHandle = urllib2.urlopen(playerUrl_raw)
-                       playerUrl = urlHandle.geturl()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self._downloader.trouble(u'ERROR: unable to find out player URL: ' + unicode(err))
-                       return
-
-               uri = mMovieParams[0][1]
-               indexUrl = 'http://shadow.comedycentral.com/feeds/video_player/mrss/?' + urllib.urlencode({'uri': uri})
-               self.report_index_download(epTitle)
-               try:
-                       indexXml = urllib2.urlopen(indexUrl).read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self._downloader.trouble(u'ERROR: unable to download episode index: ' + unicode(err))
-                       return
-
-               idoc = xml.etree.ElementTree.fromstring(indexXml)
-               itemEls = idoc.findall('.//item')
-               for itemEl in itemEls:
-                       mediaId = itemEl.findall('./guid')[0].text
-                       shortMediaId = mediaId.split(':')[-1]
-                       showId = mediaId.split(':')[-2].replace('.com', '')
-                       officialTitle = itemEl.findall('./title')[0].text
-                       officialDate = itemEl.findall('./pubDate')[0].text
-
-                       configUrl = ('http://www.comedycentral.com/global/feeds/entertainment/media/mediaGenEntertainment.jhtml?' +
-                                               urllib.urlencode({'uri': mediaId}))
-                       configReq = urllib2.Request(configUrl)
-                       self.report_config_download(epTitle)
-                       try:
-                               configXml = urllib2.urlopen(configReq).read()
-                       except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                               self._downloader.trouble(u'ERROR: unable to download webpage: %s' % unicode(err))
-                               return
-
-                       cdoc = xml.etree.ElementTree.fromstring(configXml)
-                       turls = []
-                       for rendition in cdoc.findall('.//rendition'):
-                               finfo = (rendition.attrib['bitrate'], rendition.findall('./src')[0].text)
-                               turls.append(finfo)
-
-                       if len(turls) == 0:
-                               self._downloader.trouble(u'\nERROR: unable to download ' + mediaId + ': No videos found')
-                               continue
-
-                       # For now, just pick the highest bitrate
-                       format,video_url = turls[-1]
-
-                       self._downloader.increment_downloads()
-
-                       effTitle = showId + '-' + epTitle
-                       info = {
-                               'id': shortMediaId,
-                               'url': video_url,
-                               'uploader': showId,
-                               'upload_date': officialDate,
-                               'title': effTitle,
-                               'stitle': self._simplify_title(effTitle),
-                               'ext': 'mp4',
-                               'format': format,
-                               'thumbnail': None,
-                               'description': officialTitle,
-                               'player_url': playerUrl
-                       }
-
-                       try:
-                               self._downloader.process_info(info)
-                       except UnavailableVideoError, err:
-                               self._downloader.trouble(u'\nERROR: unable to download ' + mediaId)
-                               continue
-
-
-class EscapistIE(InfoExtractor):
-       """Information extractor for The Escapist """
-
-       _VALID_URL = r'^(https?://)?(www\.)?escapistmagazine\.com/videos/view/(?P<showname>[^/]+)/(?P<episode>[^/?]+)[/?]?.*$'
-       IE_NAME = u'escapist'
-
-       def report_extraction(self, showName):
-               self._downloader.to_screen(u'[escapist] %s: Extracting information' % showName)
-
-       def report_config_download(self, showName):
-               self._downloader.to_screen(u'[escapist] %s: Downloading configuration' % showName)
-
-       def _simplify_title(self, title):
-               res = re.sub(ur'(?u)([^%s]+)' % simple_title_chars, ur'_', title)
-               res = res.strip(ur'_')
-               return res
-
-       def _real_extract(self, url):
-               htmlParser = HTMLParser.HTMLParser()
-
-               mobj = re.match(self._VALID_URL, url)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: invalid URL: %s' % url)
-                       return
-               showName = mobj.group('showname')
-               videoId = mobj.group('episode')
-
-               self.report_extraction(showName)
-               try:
-                       webPage = urllib2.urlopen(url).read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self._downloader.trouble(u'ERROR: unable to download webpage: ' + unicode(err))
-                       return
-
-               descMatch = re.search('<meta name="description" content="([^"]*)"', webPage)
-               description = htmlParser.unescape(descMatch.group(1))
-               imgMatch = re.search('<meta property="og:image" content="([^"]*)"', webPage)
-               imgUrl = htmlParser.unescape(imgMatch.group(1))
-               playerUrlMatch = re.search('<meta property="og:video" content="([^"]*)"', webPage)
-               playerUrl = htmlParser.unescape(playerUrlMatch.group(1))
-               configUrlMatch = re.search('config=(.*)$', playerUrl)
-               configUrl = urllib2.unquote(configUrlMatch.group(1))
-
-               self.report_config_download(showName)
-               try:
-                       configJSON = urllib2.urlopen(configUrl).read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self._downloader.trouble(u'ERROR: unable to download configuration: ' + unicode(err))
-                       return
-
-               # Technically, it's JavaScript, not JSON
-               configJSON = configJSON.replace("'", '"')
-
-               try:
-                       config = json.loads(configJSON)
-               except (ValueError,), err:
-                       self._downloader.trouble(u'ERROR: Invalid JSON in configuration file: ' + unicode(err))
-                       return
-
-               playlist = config['playlist']
-               videoUrl = playlist[1]['url']
-
-               self._downloader.increment_downloads()
-               info = {
-                       'id': videoId,
-                       'url': videoUrl,
-                       'uploader': showName,
-                       'upload_date': None,
-                       'title': showName,
-                       'stitle': self._simplify_title(showName),
-                       'ext': 'flv',
-                       'format': 'flv',
-                       'thumbnail': imgUrl,
-                       'description': description,
-                       'player_url': playerUrl,
-               }
-
-               try:
-                       self._downloader.process_info(info)
-               except UnavailableVideoError, err:
-                       self._downloader.trouble(u'\nERROR: unable to download ' + videoId)
-
-
-class CollegeHumorIE(InfoExtractor):
-       """Information extractor for collegehumor.com"""
-
-       _VALID_URL = r'^(?:https?://)?(?:www\.)?collegehumor\.com/video/(?P<videoid>[0-9]+)/(?P<shorttitle>.*)$'
-       IE_NAME = u'collegehumor'
-
-       def report_webpage(self, video_id):
-               """Report information extraction."""
-               self._downloader.to_screen(u'[%s] %s: Downloading webpage' % (self.IE_NAME, video_id))
-
-       def report_extraction(self, video_id):
-               """Report information extraction."""
-               self._downloader.to_screen(u'[%s] %s: Extracting information' % (self.IE_NAME, video_id))
-
-       def _simplify_title(self, title):
-               res = re.sub(ur'(?u)([^%s]+)' % simple_title_chars, ur'_', title)
-               res = res.strip(ur'_')
-               return res
-
-       def _real_extract(self, url):
-               htmlParser = HTMLParser.HTMLParser()
-
-               mobj = re.match(self._VALID_URL, url)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: invalid URL: %s' % url)
-                       return
-               video_id = mobj.group('videoid')
-
-               self.report_webpage(video_id)
-               request = urllib2.Request(url)
-               try:
-                       webpage = urllib2.urlopen(request).read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self._downloader.trouble(u'ERROR: unable to download video webpage: %s' % str(err))
-                       return
-
-               m = re.search(r'id="video:(?P<internalvideoid>[0-9]+)"', webpage)
-               if m is None:
-                       self._downloader.trouble(u'ERROR: Cannot extract internal video ID')
-                       return
-               internal_video_id = m.group('internalvideoid')
-
-               info = {
-                       'id': video_id,
-                       'internal_id': internal_video_id,
-               }
-
-               self.report_extraction(video_id)
-               xmlUrl = 'http://www.collegehumor.com/moogaloop/video:' + internal_video_id
-               try:
-                       metaXml = urllib2.urlopen(xmlUrl).read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self._downloader.trouble(u'ERROR: unable to download video info XML: %s' % str(err))
-                       return
-
-               mdoc = xml.etree.ElementTree.fromstring(metaXml)
-               try:
-                       videoNode = mdoc.findall('./video')[0]
-                       info['description'] = videoNode.findall('./description')[0].text
-                       info['title'] = videoNode.findall('./caption')[0].text
-                       info['stitle'] = self._simplify_title(info['title'])
-                       info['url'] = videoNode.findall('./file')[0].text
-                       info['thumbnail'] = videoNode.findall('./thumbnail')[0].text
-                       info['ext'] = info['url'].rpartition('.')[2]
-                       info['format'] = info['ext']
-               except IndexError:
-                       self._downloader.trouble(u'\nERROR: Invalid metadata XML file')
-                       return
-
-               self._downloader.increment_downloads()
-
-               try:
-                       self._downloader.process_info(info)
-               except UnavailableVideoError, err:
-                       self._downloader.trouble(u'\nERROR: unable to download video')
-
-
-class XVideosIE(InfoExtractor):
-       """Information extractor for xvideos.com"""
-
-       _VALID_URL = r'^(?:https?://)?(?:www\.)?xvideos\.com/video([0-9]+)(?:.*)'
-       IE_NAME = u'xvideos'
-
-       def report_webpage(self, video_id):
-               """Report information extraction."""
-               self._downloader.to_screen(u'[%s] %s: Downloading webpage' % (self.IE_NAME, video_id))
-
-       def report_extraction(self, video_id):
-               """Report information extraction."""
-               self._downloader.to_screen(u'[%s] %s: Extracting information' % (self.IE_NAME, video_id))
-
-       def _simplify_title(self, title):
-               res = re.sub(ur'(?u)([^%s]+)' % simple_title_chars, ur'_', title)
-               res = res.strip(ur'_')
-               return res
-
-       def _real_extract(self, url):
-               htmlParser = HTMLParser.HTMLParser()
-
-               mobj = re.match(self._VALID_URL, url)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: invalid URL: %s' % url)
-                       return
-               video_id = mobj.group(1).decode('utf-8')
-
-               self.report_webpage(video_id)
-
-               request = urllib2.Request(r'http://www.xvideos.com/video' + video_id)
-               try:
-                       webpage = urllib2.urlopen(request).read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self._downloader.trouble(u'ERROR: unable to download video webpage: %s' % str(err))
-                       return
-
-               self.report_extraction(video_id)
-
-
-               # Extract video URL
-               mobj = re.search(r'flv_url=(.+?)&', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract video url')
-                       return
-               video_url = urllib2.unquote(mobj.group(1).decode('utf-8'))
-
-
-               # Extract title
-               mobj = re.search(r'<title>(.*?)\s+-\s+XVID', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract video title')
-                       return
-               video_title = mobj.group(1).decode('utf-8')
-
-
-               # Extract video thumbnail
-               mobj = re.search(r'http://(?:img.*?\.)xvideos.com/videos/thumbs/[a-fA-F0-9]/[a-fA-F0-9]/[a-fA-F0-9]/([a-fA-F0-9.]+jpg)', webpage)
-               if mobj is None:
-                       self._downloader.trouble(u'ERROR: unable to extract video thumbnail')
-                       return
-               video_thumbnail = mobj.group(1).decode('utf-8')
-
-
-
-               self._downloader.increment_downloads()
-               info = {
-                       'id': video_id,
-                       'url': video_url,
-                       'uploader': None,
-                       'upload_date': None,
-                       'title': video_title,
-                       'stitle': self._simplify_title(video_title),
-                       'ext': 'flv',
-                       'format': 'flv',
-                       'thumbnail': video_thumbnail,
-                       'description': None,
-                       'player_url': None,
-               }
-
-               try:
-                       self._downloader.process_info(info)
-               except UnavailableVideoError, err:
-                       self._downloader.trouble(u'\nERROR: unable to download ' + video_id)
-
-
-class PostProcessor(object):
-       """Post Processor class.
-
-       PostProcessor objects can be added to downloaders with their
-       add_post_processor() method. When the downloader has finished a
-       successful download, it will take its internal chain of PostProcessors
-       and start calling the run() method on each one of them, first with
-       an initial argument and then with the returned value of the previous
-       PostProcessor.
-
-       The chain will be stopped if one of them ever returns None or the end
-       of the chain is reached.
-
-       PostProcessor objects follow a "mutual registration" process similar
-       to InfoExtractor objects.
-       """
-
-       _downloader = None
-
-       def __init__(self, downloader=None):
-               self._downloader = downloader
-
-       def set_downloader(self, downloader):
-               """Sets the downloader for this PP."""
-               self._downloader = downloader
-
-       def run(self, information):
-               """Run the PostProcessor.
-
-               The "information" argument is a dictionary like the ones
-               composed by InfoExtractors. The only difference is that this
-               one has an extra field called "filepath" that points to the
-               downloaded file.
-
-               When this method returns None, the postprocessing chain is
-               stopped. However, this method may return an information
-               dictionary that will be passed to the next postprocessing
-               object in the chain. It can be the one it received after
-               changing some fields.
-
-               In addition, this method may raise a PostProcessingError
-               exception that will be taken into account by the downloader
-               it was called from.
-               """
-               return information # by default, do nothing
-
-
-class FFmpegExtractAudioPP(PostProcessor):
-
-       def __init__(self, downloader=None, preferredcodec=None, preferredquality=None, keepvideo=False):
-               PostProcessor.__init__(self, downloader)
-               if preferredcodec is None:
-                       preferredcodec = 'best'
-               self._preferredcodec = preferredcodec
-               self._preferredquality = preferredquality
-               self._keepvideo = keepvideo
-
-       @staticmethod
-       def get_audio_codec(path):
-               try:
-                       cmd = ['ffprobe', '-show_streams', '--', path]
-                       handle = subprocess.Popen(cmd, stderr=file(os.path.devnull, 'w'), stdout=subprocess.PIPE)
-                       output = handle.communicate()[0]
-                       if handle.wait() != 0:
-                               return None
-               except (IOError, OSError):
-                       return None
-               audio_codec = None
-               for line in output.split('\n'):
-                       if line.startswith('codec_name='):
-                               audio_codec = line.split('=')[1].strip()
-                       elif line.strip() == 'codec_type=audio' and audio_codec is not None:
-                               return audio_codec
-               return None
-
-       @staticmethod
-       def run_ffmpeg(path, out_path, codec, more_opts):
-               try:
-                       cmd = ['ffmpeg', '-y', '-i', path, '-vn', '-acodec', codec] + more_opts + ['--', out_path]
-                       ret = subprocess.call(cmd, stdout=file(os.path.devnull, 'w'), stderr=subprocess.STDOUT)
-                       return (ret == 0)
-               except (IOError, OSError):
-                       return False
-
-       def run(self, information):
-               path = information['filepath']
-
-               filecodec = self.get_audio_codec(path)
-               if filecodec is None:
-                       self._downloader.to_stderr(u'WARNING: unable to obtain file audio codec with ffprobe')
-                       return None
-
-               more_opts = []
-               if self._preferredcodec == 'best' or self._preferredcodec == filecodec:
-                       if filecodec in ['aac', 'mp3', 'vorbis']:
-                               # Lossless if possible
-                               acodec = 'copy'
-                               extension = filecodec
-                               if filecodec == 'aac':
-                                       more_opts = ['-f', 'adts']
-                               if filecodec == 'vorbis':
-                                       extension = 'ogg'
-                       else:
-                               # MP3 otherwise.
-                               acodec = 'libmp3lame'
-                               extension = 'mp3'
-                               more_opts = []
-                               if self._preferredquality is not None:
-                                       more_opts += ['-ab', self._preferredquality]
-               else:
-                       # We convert the audio (lossy)
-                       acodec = {'mp3': 'libmp3lame', 'aac': 'aac', 'vorbis': 'libvorbis'}[self._preferredcodec]
-                       extension = self._preferredcodec
-                       more_opts = []
-                       if self._preferredquality is not None:
-                               more_opts += ['-ab', self._preferredquality]
-                       if self._preferredcodec == 'aac':
-                               more_opts += ['-f', 'adts']
-                       if self._preferredcodec == 'vorbis':
-                               extension = 'ogg'
-
-               (prefix, ext) = os.path.splitext(path)
-               new_path = prefix + '.' + extension
-               self._downloader.to_screen(u'[ffmpeg] Destination: %s' % new_path)
-               status = self.run_ffmpeg(path, new_path, acodec, more_opts)
-
-               if not status:
-                       self._downloader.to_stderr(u'WARNING: error running ffmpeg')
-                       return None
-
-               # Try to update the date time for extracted audio file.
-               if information.get('filetime') is not None:
-                       try:
-                               os.utime(new_path, (time.time(), information['filetime']))
-                       except:
-                               self._downloader.to_stderr(u'WARNING: Cannot update utime of audio file')
-
-               if not self._keepvideo:
-                       try:
-                               os.remove(path)
-                       except (IOError, OSError):
-                               self._downloader.to_stderr(u'WARNING: Unable to remove downloaded video file')
-                               return None
-
-               information['filepath'] = new_path
-               return information
-
-
-def updateSelf(downloader, filename):
-       ''' Update the program file with the latest version from the repository '''
-       # Note: downloader only used for options
-       if not os.access(filename, os.W_OK):
-               sys.exit('ERROR: no write permissions on %s' % filename)
-
-       downloader.to_screen('Updating to latest version...')
-
-       try:
-               try:
-                       urlh = urllib.urlopen(UPDATE_URL)
-                       newcontent = urlh.read()
-                       
-                       vmatch = re.search("__version__ = '([^']+)'", newcontent)
-                       if vmatch is not None and vmatch.group(1) == __version__:
-                               downloader.to_screen('youtube-dl is up-to-date (' + __version__ + ')')
-                               return
-               finally:
-                       urlh.close()
-       except (IOError, OSError), err:
-               sys.exit('ERROR: unable to download latest version')
-
-       try:
-               outf = open(filename, 'wb')
-               try:
-                       outf.write(newcontent)
-               finally:
-                       outf.close()
-       except (IOError, OSError), err:
-               sys.exit('ERROR: unable to overwrite current version')
-
-       downloader.to_screen('Updated youtube-dl. Restart youtube-dl to use the new version.')
-
-def parseOpts():
-       # Deferred imports
-       import getpass
-       import optparse
-
-       def _format_option_string(option):
-               ''' ('-o', '--option') -> -o, --format METAVAR'''
-
-               opts = []
-
-               if option._short_opts: opts.append(option._short_opts[0])
-               if option._long_opts: opts.append(option._long_opts[0])
-               if len(opts) > 1: opts.insert(1, ', ')
-
-               if option.takes_value(): opts.append(' %s' % option.metavar)
-
-               return "".join(opts)
-
-       def _find_term_columns():
-               columns = os.environ.get('COLUMNS', None)
-               if columns:
-                       return int(columns)
-
-               try:
-                       sp = subprocess.Popen(['stty', 'size'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
-                       out,err = sp.communicate()
-                       return int(out.split()[1])
-               except:
-                       pass
-               return None
-
-       max_width = 80
-       max_help_position = 80
-
-       # No need to wrap help messages if we're on a wide console
-       columns = _find_term_columns()
-       if columns: max_width = columns
-
-       fmt = optparse.IndentedHelpFormatter(width=max_width, max_help_position=max_help_position)
-       fmt.format_option_strings = _format_option_string
-
-       kw = {
-               'version'   : __version__,
-               'formatter' : fmt,
-               'usage' : '%prog [options] url [url...]',
-               'conflict_handler' : 'resolve',
-       }
-
-       parser = optparse.OptionParser(**kw)
-
-       # option groups
-       general        = optparse.OptionGroup(parser, 'General Options')
-       selection      = optparse.OptionGroup(parser, 'Video Selection')
-       authentication = optparse.OptionGroup(parser, 'Authentication Options')
-       video_format   = optparse.OptionGroup(parser, 'Video Format Options')
-       postproc       = optparse.OptionGroup(parser, 'Post-processing Options')
-       filesystem     = optparse.OptionGroup(parser, 'Filesystem Options')
-       verbosity      = optparse.OptionGroup(parser, 'Verbosity / Simulation Options')
-
-       general.add_option('-h', '--help',
-                       action='help', help='print this help text and exit')
-       general.add_option('-v', '--version',
-                       action='version', help='print program version and exit')
-       general.add_option('-U', '--update',
-                       action='store_true', dest='update_self', help='update this program to latest version')
-       general.add_option('-i', '--ignore-errors',
-                       action='store_true', dest='ignoreerrors', help='continue on download errors', default=False)
-       general.add_option('-r', '--rate-limit',
-                       dest='ratelimit', metavar='LIMIT', help='download rate limit (e.g. 50k or 44.6m)')
-       general.add_option('-R', '--retries',
-                       dest='retries', metavar='RETRIES', help='number of retries (default is 10)', default=10)
-       general.add_option('--dump-user-agent',
-                       action='store_true', dest='dump_user_agent',
-                       help='display the current browser identification', default=False)
-       general.add_option('--list-extractors',
-                       action='store_true', dest='list_extractors',
-                       help='List all supported extractors and the URLs they would handle', default=False)
-
-       selection.add_option('--playlist-start',
-                       dest='playliststart', metavar='NUMBER', help='playlist video to start at (default is 1)', default=1)
-       selection.add_option('--playlist-end',
-                       dest='playlistend', metavar='NUMBER', help='playlist video to end at (default is last)', default=-1)
-       selection.add_option('--match-title', dest='matchtitle', metavar='REGEX',help='download only matching titles (regex or caseless sub-string)')
-       selection.add_option('--reject-title', dest='rejecttitle', metavar='REGEX',help='skip download for matching titles (regex or caseless sub-string)')
-
-       authentication.add_option('-u', '--username',
-                       dest='username', metavar='USERNAME', help='account username')
-       authentication.add_option('-p', '--password',
-                       dest='password', metavar='PASSWORD', help='account password')
-       authentication.add_option('-n', '--netrc',
-                       action='store_true', dest='usenetrc', help='use .netrc authentication data', default=False)
-
-
-       video_format.add_option('-f', '--format',
-                       action='store', dest='format', metavar='FORMAT', help='video format code')
-       video_format.add_option('--all-formats',
-                       action='store_const', dest='format', help='download all available video formats', const='all')
-       video_format.add_option('--max-quality',
-                       action='store', dest='format_limit', metavar='FORMAT', help='highest quality format to download')
-       video_format.add_option('-F', '--list-formats',
-                       action='store_true', dest='listformats', help='list all available formats (currently youtube only)')
-
-
-       verbosity.add_option('-q', '--quiet',
-                       action='store_true', dest='quiet', help='activates quiet mode', default=False)
-       verbosity.add_option('-s', '--simulate',
-                       action='store_true', dest='simulate', help='do not download the video and do not write anything to disk', default=False)
-       verbosity.add_option('--skip-download',
-                       action='store_true', dest='skip_download', help='do not download the video', default=False)
-       verbosity.add_option('-g', '--get-url',
-                       action='store_true', dest='geturl', help='simulate, quiet but print URL', default=False)
-       verbosity.add_option('-e', '--get-title',
-                       action='store_true', dest='gettitle', help='simulate, quiet but print title', default=False)
-       verbosity.add_option('--get-thumbnail',
-                       action='store_true', dest='getthumbnail',
-                       help='simulate, quiet but print thumbnail URL', default=False)
-       verbosity.add_option('--get-description',
-                       action='store_true', dest='getdescription',
-                       help='simulate, quiet but print video description', default=False)
-       verbosity.add_option('--get-filename',
-                       action='store_true', dest='getfilename',
-                       help='simulate, quiet but print output filename', default=False)
-       verbosity.add_option('--get-format',
-                       action='store_true', dest='getformat',
-                       help='simulate, quiet but print output format', default=False)
-       verbosity.add_option('--no-progress',
-                       action='store_true', dest='noprogress', help='do not print progress bar', default=False)
-       verbosity.add_option('--console-title',
-                       action='store_true', dest='consoletitle',
-                       help='display progress in console titlebar', default=False)
-
-
-       filesystem.add_option('-t', '--title',
-                       action='store_true', dest='usetitle', help='use title in file name', default=False)
-       filesystem.add_option('-l', '--literal',
-                       action='store_true', dest='useliteral', help='use literal title in file name', default=False)
-       filesystem.add_option('-A', '--auto-number',
-                       action='store_true', dest='autonumber',
-                       help='number downloaded files starting from 00000', default=False)
-       filesystem.add_option('-o', '--output',
-                       dest='outtmpl', metavar='TEMPLATE', help='output filename template. Use %(stitle)s to get the title, %(uploader)s for the uploader name, %(autonumber)s to get an automatically incremented number, %(ext)s for the filename extension, and %% for a literal percent')
-       filesystem.add_option('-a', '--batch-file',
-                       dest='batchfile', metavar='FILE', help='file containing URLs to download (\'-\' for stdin)')
-       filesystem.add_option('-w', '--no-overwrites',
-                       action='store_true', dest='nooverwrites', help='do not overwrite files', default=False)
-       filesystem.add_option('-c', '--continue',
-                       action='store_true', dest='continue_dl', help='resume partially downloaded files', default=False)
-       filesystem.add_option('--no-continue',
-                       action='store_false', dest='continue_dl',
-                       help='do not resume partially downloaded files (restart from beginning)')
-       filesystem.add_option('--cookies',
-                       dest='cookiefile', metavar='FILE', help='file to read cookies from and dump cookie jar in')
-       filesystem.add_option('--no-part',
-                       action='store_true', dest='nopart', help='do not use .part files', default=False)
-       filesystem.add_option('--no-mtime',
-                       action='store_false', dest='updatetime',
-                       help='do not use the Last-modified header to set the file modification time', default=True)
-       filesystem.add_option('--write-description',
-                       action='store_true', dest='writedescription',
-                       help='write video description to a .description file', default=False)
-       filesystem.add_option('--write-info-json',
-                       action='store_true', dest='writeinfojson',
-                       help='write video metadata to a .info.json file', default=False)
-
-
-       postproc.add_option('--extract-audio', action='store_true', dest='extractaudio', default=False,
-                       help='convert video files to audio-only files (requires ffmpeg and ffprobe)')
-       postproc.add_option('--audio-format', metavar='FORMAT', dest='audioformat', default='best',
-                       help='"best", "aac", "vorbis" or "mp3"; best by default')
-       postproc.add_option('--audio-quality', metavar='QUALITY', dest='audioquality', default='128K',
-                       help='ffmpeg audio bitrate specification, 128k by default')
-       postproc.add_option('-k', '--keep-video', action='store_true', dest='keepvideo', default=False,
-                       help='keeps the video file on disk after the post-processing; the video is erased by default')
-
-
-       parser.add_option_group(general)
-       parser.add_option_group(selection)
-       parser.add_option_group(filesystem)
-       parser.add_option_group(verbosity)
-       parser.add_option_group(video_format)
-       parser.add_option_group(authentication)
-       parser.add_option_group(postproc)
-
-       opts, args = parser.parse_args()
-
-       return parser, opts, args
-
-def gen_extractors():
-       """ Return a list of an instance of every supported extractor.
-       The order does matter; the first extractor matched is the one handling the URL.
-       """
-       youtube_ie = YoutubeIE()
-       google_ie = GoogleIE()
-       yahoo_ie = YahooIE()
-       return [
-               YoutubePlaylistIE(youtube_ie),
-               YoutubeUserIE(youtube_ie),
-               YoutubeSearchIE(youtube_ie),
-               youtube_ie,
-               MetacafeIE(youtube_ie),
-               DailymotionIE(),
-               google_ie,
-               GoogleSearchIE(google_ie),
-               PhotobucketIE(),
-               yahoo_ie,
-               YahooSearchIE(yahoo_ie),
-               DepositFilesIE(),
-               FacebookIE(),
-               BlipTVIE(),
-               VimeoIE(),
-               MyVideoIE(),
-               ComedyCentralIE(),
-               EscapistIE(),
-               CollegeHumorIE(),
-               XVideosIE(),
-
-               GenericIE()
-       ]
-
-def main():
-       parser, opts, args = parseOpts()
-
-       # Open appropriate CookieJar
-       if opts.cookiefile is None:
-               jar = cookielib.CookieJar()
-       else:
-               try:
-                       jar = cookielib.MozillaCookieJar(opts.cookiefile)
-                       if os.path.isfile(opts.cookiefile) and os.access(opts.cookiefile, os.R_OK):
-                               jar.load()
-               except (IOError, OSError), err:
-                       sys.exit(u'ERROR: unable to open cookie file')
-
-       # Dump user agent
-       if opts.dump_user_agent:
-               print std_headers['User-Agent']
-               sys.exit(0)
-
-       # Batch file verification
-       batchurls = []
-       if opts.batchfile is not None:
-               try:
-                       if opts.batchfile == '-':
-                               batchfd = sys.stdin
-                       else:
-                               batchfd = open(opts.batchfile, 'r')
-                       batchurls = batchfd.readlines()
-                       batchurls = [x.strip() for x in batchurls]
-                       batchurls = [x for x in batchurls if len(x) > 0 and not re.search(r'^[#/;]', x)]
-               except IOError:
-                       sys.exit(u'ERROR: batch file could not be read')
-       all_urls = batchurls + args
-
-       # General configuration
-       cookie_processor = urllib2.HTTPCookieProcessor(jar)
-       opener = urllib2.build_opener(urllib2.ProxyHandler(), cookie_processor, YoutubeDLHandler())
-       urllib2.install_opener(opener)
-       socket.setdefaulttimeout(300) # 5 minutes should be enough (famous last words)
-
-       extractors = gen_extractors()
-
-       if opts.list_extractors:
-               for ie in extractors:
-                       print(ie.IE_NAME)
-                       matchedUrls = filter(lambda url: ie.suitable(url), all_urls)
-                       all_urls = filter(lambda url: url not in matchedUrls, all_urls)
-                       for mu in matchedUrls:
-                               print(u'  ' + mu)
-               sys.exit(0)
-
-       # Conflicting, missing and erroneous options
-       if opts.usenetrc and (opts.username is not None or opts.password is not None):
-               parser.error(u'using .netrc conflicts with giving username/password')
-       if opts.password is not None and opts.username is None:
-               parser.error(u'account username missing')
-       if opts.outtmpl is not None and (opts.useliteral or opts.usetitle or opts.autonumber):
-               parser.error(u'using output template conflicts with using title, literal title or auto number')
-       if opts.usetitle and opts.useliteral:
-               parser.error(u'using title conflicts with using literal title')
-       if opts.username is not None and opts.password is None:
-               opts.password = getpass.getpass(u'Type account password and press return:')
-       if opts.ratelimit is not None:
-               numeric_limit = FileDownloader.parse_bytes(opts.ratelimit)
-               if numeric_limit is None:
-                       parser.error(u'invalid rate limit specified')
-               opts.ratelimit = numeric_limit
-       if opts.retries is not None:
-               try:
-                       opts.retries = long(opts.retries)
-               except (TypeError, ValueError), err:
-                       parser.error(u'invalid retry count specified')
-       try:
-               opts.playliststart = int(opts.playliststart)
-               if opts.playliststart <= 0:
-                       raise ValueError(u'Playlist start must be positive')
-       except (TypeError, ValueError), err:
-               parser.error(u'invalid playlist start number specified')
-       try:
-               opts.playlistend = int(opts.playlistend)
-               if opts.playlistend != -1 and (opts.playlistend <= 0 or opts.playlistend < opts.playliststart):
-                       raise ValueError(u'Playlist end must be greater than playlist start')
-       except (TypeError, ValueError), err:
-               parser.error(u'invalid playlist end number specified')
-       if opts.extractaudio:
-               if opts.audioformat not in ['best', 'aac', 'mp3', 'vorbis']:
-                       parser.error(u'invalid audio format specified')
-
-       # File downloader
-       fd = FileDownloader({
-               'usenetrc': opts.usenetrc,
-               'username': opts.username,
-               'password': opts.password,
-               'quiet': (opts.quiet or opts.geturl or opts.gettitle or opts.getthumbnail or opts.getdescription or opts.getfilename or opts.getformat),
-               'forceurl': opts.geturl,
-               'forcetitle': opts.gettitle,
-               'forcethumbnail': opts.getthumbnail,
-               'forcedescription': opts.getdescription,
-               'forcefilename': opts.getfilename,
-               'forceformat': opts.getformat,
-               'simulate': opts.simulate,
-               'skip_download': (opts.skip_download or opts.simulate or opts.geturl or opts.gettitle or opts.getthumbnail or opts.getdescription or opts.getfilename or opts.getformat),
-               'format': opts.format,
-               'format_limit': opts.format_limit,
-               'listformats': opts.listformats,
-               'outtmpl': ((opts.outtmpl is not None and opts.outtmpl.decode(preferredencoding()))
-                       or (opts.format == '-1' and opts.usetitle and u'%(stitle)s-%(id)s-%(format)s.%(ext)s')
-                       or (opts.format == '-1' and opts.useliteral and u'%(title)s-%(id)s-%(format)s.%(ext)s')
-                       or (opts.format == '-1' and u'%(id)s-%(format)s.%(ext)s')
-                       or (opts.usetitle and opts.autonumber and u'%(autonumber)s-%(stitle)s-%(id)s.%(ext)s')
-                       or (opts.useliteral and opts.autonumber and u'%(autonumber)s-%(title)s-%(id)s.%(ext)s')
-                       or (opts.usetitle and u'%(stitle)s-%(id)s.%(ext)s')
-                       or (opts.useliteral and u'%(title)s-%(id)s.%(ext)s')
-                       or (opts.autonumber and u'%(autonumber)s-%(id)s.%(ext)s')
-                       or u'%(id)s.%(ext)s'),
-               'ignoreerrors': opts.ignoreerrors,
-               'ratelimit': opts.ratelimit,
-               'nooverwrites': opts.nooverwrites,
-               'retries': opts.retries,
-               'continuedl': opts.continue_dl,
-               'noprogress': opts.noprogress,
-               'playliststart': opts.playliststart,
-               'playlistend': opts.playlistend,
-               'logtostderr': opts.outtmpl == '-',
-               'consoletitle': opts.consoletitle,
-               'nopart': opts.nopart,
-               'updatetime': opts.updatetime,
-               'writedescription': opts.writedescription,
-               'writeinfojson': opts.writeinfojson,
-               'matchtitle': opts.matchtitle,
-               'rejecttitle': opts.rejecttitle,
-               })
-       for extractor in extractors:
-               fd.add_info_extractor(extractor)
-
-       # PostProcessors
-       if opts.extractaudio:
-               fd.add_post_processor(FFmpegExtractAudioPP(preferredcodec=opts.audioformat, preferredquality=opts.audioquality, keepvideo=opts.keepvideo))
-
-       # Update version
-       if opts.update_self:
-               updateSelf(fd, sys.argv[0])
-
-       # Maybe do nothing
-       if len(all_urls) < 1:
-               if not opts.update_self:
-                       parser.error(u'you must provide at least one URL')
-               else:
-                       sys.exit()
-       retcode = fd.download(all_urls)
-
-       # Dump cookie jar if requested
-       if opts.cookiefile is not None:
-               try:
-                       jar.save()
-               except (IOError, OSError), err:
-                       sys.exit(u'ERROR: unable to save cookie jar')
-
-       sys.exit(retcode)
-
-
-if __name__ == '__main__':
-       try:
-               main()
-       except DownloadError:
-               sys.exit(1)
-       except SameFileError:
-               sys.exit(u'ERROR: fixed output name but more than one file to download')
-       except KeyboardInterrupt:
-               sys.exit(u'\nERROR: Interrupted by user')
+try:
+    with open(filename, 'wb') as outf:
+        outf.write(newcontent)
+except (IOError, OSError) as err:
+    sys.exit('ERROR: unable to overwrite current version')

 
 

-# vim: set ts=4 sw=4 sts=4 noet ai si filetype=python:
+sys.stderr.write(u'Done! Now you can run youtube-dl.\n')