X-Git-Url: https://git.rapsys.eu/youtubedl/blobdiff_plain/46725bc1779b400a4950edfc60d6b4ce9c12120f..7d41ef900c8e7727604e1fdd2525d26e1a0e386e:/youtube-dl?ds=sidebyside

diff --git a/youtube-dl b/youtube-dl
index e8b19c8..e3eb877 100755
--- a/youtube-dl
+++ b/youtube-dl
@@ -1,3003 +1,89 @@
 #!/usr/bin/env python
-# -*- coding: utf-8 -*-
-# Author: Ricardo Garcia Gonzalez
-# Author: Danny Colligan
-# Author: Benjamin Johnson
-# Author: Vasyl' Vavrychuk
-# Author: Witold Baryluk
-# Author: Paweł Paprota
-# Author: Gergely Imreh
-# License: Public domain code
-import cookielib
-import ctypes
-import datetime
-import email.utils
-import gzip
-import htmlentitydefs
-import httplib
-import locale
-import math
-import netrc
-import os
-import os.path
-import re
-import socket
-import string
-import StringIO
-import subprocess
-import sys
-import time
-import urllib
-import urllib2
-import zlib
 
-# 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
-
-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',
-}
-
-simple_title_chars = string.ascii_letters.decode('ascii') + string.digits.decode('ascii')
-
-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.
-	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.
-	"""
-
-	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 pmkdir(filename):
-		"""Create directory components in filename. Similar to Unix "mkdir -p"."""
-		components = filename.split(os.sep)
-		aggregate = [os.sep.join(components[0:x]) for x in xrange(1, len(components))]
-		aggregate = ['%s%s' % (x, os.sep) for x in aggregate] # Finish names with separator
-		for dir in aggregate:
-			if not os.path.exists(dir):
-				os.mkdir(dir)
-
-	@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
-		try:
-			os.utime(filename,(time.time(), filetime))
-		except:
-			pass
-
-	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)
-		# Do nothing else if in simulate mode
-		if self.params.get('simulate', False):
-			# 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')
-
-			return
-
-		if filename is None:
-			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:
-			self.pmkdir(filename)
-		except (OSError, IOError), err:
-			self.trouble(u'ERROR: unable to create directories: %s' % str(err))
-			return
-
-		try:
-			success = self._do_download(filename, info_dict['url'].encode('utf-8'), info_dict.get('player_url', None))
-		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
-		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, url, player_url):
-		# 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
-		open_mode = 'wb'
-
-		# 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
-
-		# Request parameters in case of being able to resume
-		if self.params.get('continuedl', False) and resume_len != 0:
-			self.report_resuming_byte(resume_len)
-			request.add_header('Range','bytes=%d-' % resume_len)
-			open_mode = 'ab'
-
-		count = 0
-		retries = self.params.get('retries', 0)
-		while count <= retries:
-			# Establish connection
-			try:
-				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)
-					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
-			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)
-			speed_str = self.calc_speed(start, time.time(), 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)
-
-		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):
-			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:
-
-	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, as well as the suitable() static method.
-	Probably, they should also be instantiated and added to the main
-	downloader.
-	"""
-
-	_ready = False
-	_downloader = None
-
-	def __init__(self, downloader=None):
-		"""Constructor. Receives an optional downloader."""
-		self._ready = False
-		self.set_downloader(downloader)
-
-	@staticmethod
-	def suitable(url):
-		"""Receives a URL and returns True if suitable for this IE."""
-		return False
-
-	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/)(?:(?:(?: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', '34', '43', '18', '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',
-		'45': 'webm',
-	}
-
-	@staticmethod
-	def suitable(url):
-		return (re.match(YoutubeIE._VALID_URL, url) is not None)
-
-	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 _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&amp;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
-		video_description = 'No description available.'
-		if self._downloader.params.get('forcedescription', False):
-			mobj = re.search(r'<meta name="description" content="(.*)"(?:\s*/)?>', video_webpage)
-			if mobj is not None:
-				video_description = mobj.group(1)
-
-		# token
-		video_token = urllib.unquote_plus(video_info['token'][0])
-
-		# Decide which formats to download
-		req_format = self._downloader.params.get('format', None)
-
-		if '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 = [dict(pairStr.split('=') for pairStr in uds.split('&')) for uds in url_data_strs]
-			url_map = dict((ud['itag'], urllib.unquote(ud['url'])) 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 req_format is None:
-				video_url_list = [(existing_formats[0], url_map[existing_formats[0]])] # Best 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
-
-		elif 'conn' in video_info and video_info['conn'][0].startswith('rtmp'):
-			self.report_rtmp_download()
-			video_url_list = [(None, video_info['conn'][0])]
-
-		else:
-			self._downloader.trouble(u'ERROR: no fmt_url_map or conn 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')
-
-			# Find the video URL in fmt_url_map or conn paramters
-			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':	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
-
-	def __init__(self, youtube_ie, downloader=None):
-		InfoExtractor.__init__(self, downloader)
-		self._youtube_ie = youtube_ie
-
-	@staticmethod
-	def suitable(url):
-		return (re.match(MetacafeIE._VALID_URL, url) is not None)
-
-	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/([^_/]+)_([^/]+)'
-
-	def __init__(self, downloader=None):
-		InfoExtractor.__init__(self, downloader)
-
-	@staticmethod
-	def suitable(url):
-		return (re.match(DailymotionIE._VALID_URL, url) is not None)
-
-	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)
-		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\(\"video\"\s*,\s*\"([^\"]*)\"\)', webpage)
-		if mobj is None:
-			self._downloader.trouble(u'ERROR: unable to extract media URL')
-			return
-		mediaURL = urllib.unquote(mobj.group(1))
-
-		# if needed add http://www.dailymotion.com/ if relative URL
-
-		video_url = mediaURL
-
-		# '<meta\s+name="title"\s+content="Dailymotion\s*[:\-]\s*(.*?)"\s*\/\s*>'
-		mobj = re.search(r'(?im)<title>Dailymotion\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)<Attribute name="owner">(.+?)</Attribute>', 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=([^\&]+).*'
-
-	def __init__(self, downloader=None):
-		InfoExtractor.__init__(self, downloader)
-
-	@staticmethod
-	def suitable(url):
-		return (re.match(GoogleIE._VALID_URL, url) is not None)
-
-	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)'
-
-	def __init__(self, downloader=None):
-		InfoExtractor.__init__(self, downloader)
-
-	@staticmethod
-	def suitable(url):
-		return (re.match(PhotobucketIE._VALID_URL, url) is not None)
-
-	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)
+import sys, os
+import json, hashlib
 
-	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]+)(?:[#\?].*)?'
-
-	def __init__(self, downloader=None):
-		InfoExtractor.__init__(self, downloader)
-
-	@staticmethod
-	def suitable(url):
-		return (re.match(YahooIE._VALID_URL, url) is not None)
-
-	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
-
-		# At this point we have a new video
-		self._downloader.increment_downloads()
-		video_id = mobj.group(2)
-		video_extension = 'flv'
-
-		# 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,
-				'description':	video_description,
-				'player_url':	None,
-			})
-		except UnavailableVideoError:
-			self._downloader.trouble(u'\nERROR: unable to download video')
-
-
-class GenericIE(InfoExtractor):
-	"""Generic last-resort information extractor."""
-
-	def __init__(self, downloader=None):
-		InfoExtractor.__init__(self, downloader)
-
-	@staticmethod
-	def suitable(url):
-		return True
-
-	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_QUERY = 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
-
-	def __init__(self, youtube_ie, downloader=None):
-		InfoExtractor.__init__(self, downloader)
-		self._youtube_ie = youtube_ie
-
-	@staticmethod
-	def suitable(url):
-		return (re.match(YoutubeSearchIE._VALID_QUERY, url) is not None)
-
-	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_QUERY, 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_QUERY = 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
-
-	def __init__(self, google_ie, downloader=None):
-		InfoExtractor.__init__(self, downloader)
-		self._google_ie = google_ie
-
-	@staticmethod
-	def suitable(url):
-		return (re.match(GoogleSearchIE._VALID_QUERY, url) is not None)
-
-	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_QUERY, 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_QUERY = 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
-
-	def __init__(self, yahoo_ie, downloader=None):
-		InfoExtractor.__init__(self, downloader)
-		self._yahoo_ie = yahoo_ie
-
-	@staticmethod
-	def suitable(url):
-		return (re.match(YahooSearchIE._VALID_QUERY, url) is not None)
-
-	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_QUERY, 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'(?:http://)?(?:\w+\.)?youtube.com/(?:(?:view_play_list|my_playlists|artist)\?.*?(p|a)=|user/.*?/user/|p/|user/.*?#[pg]/c/)([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
-
-	def __init__(self, youtube_ie, downloader=None):
-		InfoExtractor.__init__(self, downloader)
-		self._youtube_ie = youtube_ie
-
-	@staticmethod
-	def suitable(url):
-		return (re.match(YoutubePlaylistIE._VALID_URL, url) is not None)
-
-	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'(?:(?:(?:http://)?(?:\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
-
-	def __init__(self, youtube_ie, downloader=None):
-		InfoExtractor.__init__(self, downloader)
-		self._youtube_ie = youtube_ie
-
-	@staticmethod
-	def suitable(url):
-		return (re.match(YoutubeUserIE._VALID_URL, url) is not None)
-
-	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/(.+)'
-
-	def __init__(self, downloader=None):
-		InfoExtractor.__init__(self, downloader)
-
-	@staticmethod
-	def suitable(url):
-		return (re.match(DepositFilesIE._VALID_URL, url) is not None)
-
-	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',
-	}
-
-	def __init__(self, downloader=None):
-		InfoExtractor.__init__(self, downloader)
-
-	@staticmethod
-	def suitable(url):
-		return (re.match(FacebookIE._VALID_URL, url) is not None)
-
-	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 = 'No description available.'
-		if (self._downloader.params.get('forcedescription', False) and
-		    'description' in video_info):
-			video_description = video_info['description']
-
-		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 == '-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')
-
-			# Find the video URL in fmt_url_map or conn paramters
-			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 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):
-		PostProcessor.__init__(self, downloader)
-		if preferredcodec is None:
-			preferredcodec = 'best'
-		self._preferredcodec = preferredcodec
-
-	@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 == 'aac' or filecodec == 'mp3':
-				# Lossless if possible
-				acodec = 'copy'
-				extension = filecodec
-				if filecodec == 'aac':
-					more_opts = ['-f', 'adts']
-			else:
-				# MP3 otherwise.
-				acodec = 'libmp3lame'
-				extension = 'mp3'
-				more_opts = ['-ab', '128k']
-		else:
-			# We convert the audio (lossy)
-			acodec = {'mp3': 'libmp3lame', 'aac': 'aac'}[self._preferredcodec]
-			extension = self._preferredcodec
-			more_opts = ['-ab', '128k']
-			if self._preferredcodec == 'aac':
-				more_opts += ['-f', 'adts']
-
-		(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:
-			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
-
-### MAIN PROGRAM ###
-if __name__ == '__main__':
-	try:
-		# Modules needed only when running the main program
-		import getpass
-		import optparse
-
-		# Function to update the program file with the latest version from the repository.
-		def update_self(downloader, filename):
-			# 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 stable version...')
-			try:
-				latest_url = 'http://github.com/rg3/youtube-dl/raw/master/LATEST_VERSION'
-				latest_version = urllib.urlopen(latest_url).read().strip()
-				prog_url = 'http://github.com/rg3/youtube-dl/raw/%s/youtube-dl' % latest_version
-				newcontent = urllib.urlopen(prog_url).read()
-			except (IOError, OSError), err:
-				sys.exit('ERROR: unable to download latest version')
-			try:
-				stream = open(filename, 'w')
-				stream.write(newcontent)
-				stream.close()
-			except (IOError, OSError), err:
-				sys.exit('ERROR: unable to overwrite current version')
-			downloader.to_screen('Updated to version %s' % latest_version)
-
-		# Parse command line
-		parser = optparse.OptionParser(
-			usage='Usage: %prog [options] url...',
-			version='2011.08.04',
-			conflict_handler='resolve',
-		)
-
-		parser.add_option('-h', '--help',
-				action='help', help='print this help text and exit')
-		parser.add_option('-v', '--version',
-				action='version', help='print program version and exit')
-		parser.add_option('-U', '--update',
-				action='store_true', dest='update_self', help='update this program to latest stable version')
-		parser.add_option('-i', '--ignore-errors',
-				action='store_true', dest='ignoreerrors', help='continue on download errors', default=False)
-		parser.add_option('-r', '--rate-limit',
-				dest='ratelimit', metavar='LIMIT', help='download rate limit (e.g. 50k or 44.6m)')
-		parser.add_option('-R', '--retries',
-				dest='retries', metavar='RETRIES', help='number of retries (default is 10)', default=10)
-		parser.add_option('--playlist-start',
-				dest='playliststart', metavar='NUMBER', help='playlist video to start at (default is 1)', default=1)
-		parser.add_option('--playlist-end',
-				dest='playlistend', metavar='NUMBER', help='playlist video to end at (default is last)', default=-1)
-		parser.add_option('--dump-user-agent',
-				action='store_true', dest='dump_user_agent',
-				help='display the current browser identification', default=False)
-
-		authentication = optparse.OptionGroup(parser, 'Authentication Options')
-		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)
-		parser.add_option_group(authentication)
-
-		video_format = optparse.OptionGroup(parser, 'Video Format Options')
-		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='-1')
-		video_format.add_option('--max-quality',
-				action='store', dest='format_limit', metavar='FORMAT', help='highest quality format to download')
-		parser.add_option_group(video_format)
-
-		verbosity = optparse.OptionGroup(parser, 'Verbosity / Simulation Options')
-		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 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('--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)
-		parser.add_option_group(verbosity)
-
-		filesystem = optparse.OptionGroup(parser, 'Filesystem Options')
-		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')
-		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('--cookies',
-				dest='cookiefile', metavar='FILE', help='file to dump cookie jar to')
-		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)
-		parser.add_option_group(filesystem)
-
-		postproc = optparse.OptionGroup(parser, 'Post-processing Options')
-		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" or "mp3"; best by default')
-		parser.add_option_group(postproc)
-
-		(opts, args) = parser.parse_args()
-
-		# 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)
-
-		# General configuration
-		cookie_processor = urllib2.HTTPCookieProcessor(jar)
-		urllib2.install_opener(urllib2.build_opener(urllib2.ProxyHandler(), cookie_processor, YoutubeDLHandler()))
-		socket.setdefaulttimeout(300) # 5 minutes should be enough (famous last words)
-
-		# 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
-
-		# 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 = long(opts.playliststart)
-			if opts.playliststart <= 0:
-				raise ValueError
-		except (TypeError, ValueError), err:
-			parser.error(u'invalid playlist start number specified')
-		try:
-			opts.playlistend = long(opts.playlistend)
-			if opts.playlistend != -1 and (opts.playlistend <= 0 or opts.playlistend < opts.playliststart):
-				raise ValueError
-		except (TypeError, ValueError), err:
-			parser.error(u'invalid playlist end number specified')
-		if opts.extractaudio:
-			if opts.audioformat not in ['best', 'aac', 'mp3']:
-				parser.error(u'invalid audio format specified')
+try:
+    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')
 
-		# Information extractors
-		youtube_ie = YoutubeIE()
-		metacafe_ie = MetacafeIE(youtube_ie)
-		dailymotion_ie = DailymotionIE()
-		youtube_pl_ie = YoutubePlaylistIE(youtube_ie)
-		youtube_user_ie = YoutubeUserIE(youtube_ie)
-		youtube_search_ie = YoutubeSearchIE(youtube_ie)
-		google_ie = GoogleIE()
-		google_search_ie = GoogleSearchIE(google_ie)
-		photobucket_ie = PhotobucketIE()
-		yahoo_ie = YahooIE()
-		yahoo_search_ie = YahooSearchIE(yahoo_ie)
-		deposit_files_ie = DepositFilesIE()
-		facebook_ie = FacebookIE()
-		generic_ie = GenericIE()
+try:
+	raw_input()
+except NameError: # Python 3
+	input()
 
-		# 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),
-			'forceurl': opts.geturl,
-			'forcetitle': opts.gettitle,
-			'forcethumbnail': opts.getthumbnail,
-			'forcedescription': opts.getdescription,
-			'forcefilename': opts.getfilename,
-			'simulate': (opts.simulate or opts.geturl or opts.gettitle or opts.getthumbnail or opts.getdescription or opts.getfilename),
-			'format': opts.format,
-			'format_limit': opts.format_limit,
-			'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,
-			})
-		fd.add_info_extractor(youtube_search_ie)
-		fd.add_info_extractor(youtube_pl_ie)
-		fd.add_info_extractor(youtube_user_ie)
-		fd.add_info_extractor(metacafe_ie)
-		fd.add_info_extractor(dailymotion_ie)
-		fd.add_info_extractor(youtube_ie)
-		fd.add_info_extractor(google_ie)
-		fd.add_info_extractor(google_search_ie)
-		fd.add_info_extractor(photobucket_ie)
-		fd.add_info_extractor(yahoo_ie)
-		fd.add_info_extractor(yahoo_search_ie)
-		fd.add_info_extractor(deposit_files_ie)
-		fd.add_info_extractor(facebook_ie)
+filename = sys.argv[0]
 
-		# This must come last since it's the
-		# fallback if none of the others work
-		fd.add_info_extractor(generic_ie)
+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)
 
-		# PostProcessors
-		if opts.extractaudio:
-			fd.add_post_processor(FFmpegExtractAudioPP(preferredcodec=opts.audioformat))
+if not os.access(filename, os.W_OK):
+    sys.exit('ERROR: no write permissions on %s' % filename)
 
-		# Update version
-		if opts.update_self:
-			update_self(fd, sys.argv[0])
+try:
+    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']]
 
-		# 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)
+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')
 
-		# 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')
+newcontent_hash = hashlib.sha256(newcontent).hexdigest()
+if newcontent_hash != version['bin'][1]:
+    sys.exit(u'ERROR: the downloaded file hash does not match. Aborting.')
 
-		sys.exit(retcode)
+try:
+    with open(filename, 'wb') as outf:
+        outf.write(newcontent)
+except (IOError, OSError) as err:
+    sys.exit('ERROR: unable to overwrite current version')
 
-	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')
+sys.stderr.write(u'Done! Now you can run youtube-dl.\n')