X-Git-Url: https://git.rapsys.eu/youtubedl/blobdiff_plain/b1e8c1f49aec204ae7b90abd71dead191d647c3c..e93e4d7625503b08a06df20255c4c54c8d6f38a7:/youtube-dl?ds=sidebyside

diff --git a/youtube-dl b/youtube-dl
index dbd40b7..e8b19c8 100755
--- a/youtube-dl
+++ b/youtube-dl
@@ -1,246 +1,3003 @@
 #!/usr/bin/env python
-#
-# Copyright (c) 2006 Ricardo Garcia Gonzalez
-#
-# Permission is hereby granted, free of charge, to any person obtaining a
-# copy of this software and associated documentation files (the "Software"),
-# to deal in the Software without restriction, including without limitation
-# the rights to use, copy, modify, merge, publish, distribute, sublicense,
-# and/or sell copies of the Software, and to permit persons to whom the
-# Software is furnished to do so, subject to the following conditions:
-# 
-# The above copyright notice and this permission notice shall be included
-# in all copies or substantial portions of the Software.
-# 
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
-# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
-# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
-# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
-# OTHER DEALINGS IN THE SOFTWARE.
-# 
-# Except as contained in this notice, the name(s) of the above copyright
-# holders shall not be used in advertising or otherwise to promote the
-# sale, use or other dealings in this Software without prior written
-# authorization.
-#
+# -*- 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 optparse
+import time
+import urllib
 import urllib2
-import re
+import zlib
 
-# Exit status constants
-exit_failure = 1
-exit_success = 0
-
-# Global constants
-const_video_url_str = 'http://www.youtube.com/watch?v=%s'
-const_video_url_re = re.compile(r'http://(?:www\.)?youtube\.com/(?:v/|(?:watch)?\?v=)([^&]+).*')
-const_login_url_str = 'http://www.youtube.com/signup?next=/'
-const_login_post_str = 'current_form=loginForm&next=%%2F&username=%s&password=%s&action_login=Log+In'
-const_age_url_str = 'http://www.youtube.com/verify_age?next_url=/watch%%3Fv%%3D%s'
-const_age_post_str = 'next_url=%%2Fwatch%%3Fv%%3D%s&action_confirm=Confirm'
-const_video_url_params_re = re.compile(r'player2\.swf\?video_id=([^&]+)&.*t=([^&]+)&', re.M)
-const_video_url_real_str = 'http://www.youtube.com/get_video?video_id=%s&t=%s'
-const_1k = 1024
-const_block_size = 10 * const_1k
-
-# Print error message, followed by standard advice information, and then exit
-def error_advice_exit(error_text):
-	global exit_failure
-	sys.stderr.write('Error: %s.\n' % error_text)
-	sys.stderr.write('Try again several times. It may be a temporal problem.\n')
-	sys.stderr.write('Other typical problems:\n\n')
-	sys.stderr.write('\tVideo no longer exists.\n')
-	sys.stderr.write('\tVideo requires age confirmation but you did not provide an account.\n')
-	sys.stderr.write('\tYou provided the account data, but it is not valid.\n')
-	sys.stderr.write('\tThe connection was cut suddenly for some reason.\n')
-	sys.stderr.write('\tYouTube changed their system, and the program no longer works.\n')
-	sys.stderr.write('\nTry to confirm you are able to view the video using a web browser.\n')
-	sys.stderr.write('Use the same video URL and account information, if needed, with this program.\n')
-	sys.stderr.write('Try again several times and contact me if the problem persists.\n')
-	sys.exit(exit_failure)
-
-# Wrapper to create custom requests with typical headers
-def request_create(url, data=None):
-	retval = urllib2.Request(url)
-	if not data is None:
-		retval.add_data(data)
-	# Try to mimic Firefox, at least a little bit
-	retval.add_header('User-Agent', 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.6) Gecko/20060728 Firefox/1.5.0.6')
-	retval.add_header('Accept-Charset', 'ISO-8859-1,utf-8;q=0.7,*;q=0.7')
-	retval.add_header('Accept', 'text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5')
-	retval.add_header('Accept-Language', 'en-us,en;q=0.5')
-	return retval
-
-# Perform a request, process headers and return response
-def perform_request(url, data=None):
-	request = request_create(url, data)
-	response = urllib2.urlopen(request)
-	return response
-
-# Convert bytes to KiB
-def to_k(bytes):
-	global const_1k
-	return bytes / const_1k
-
-# Conditional print
-def cond_print(str):
-	global cmdl_opts
-	if not cmdl_opts.quiet:
-		sys.stdout.write(str)
-		sys.stdout.flush()
-
-# Create the command line options parser and parse command line
-cmdl_usage = 'usage: %prog [options] video_url'
-cmdl_version = '2006.08.28'
-cmdl_parser = optparse.OptionParser(usage=cmdl_usage, version=cmdl_version, conflict_handler='resolve')
-cmdl_parser.add_option('-h', '--help', action='help', help='print this help text and exit')
-cmdl_parser.add_option('-v', '--version', action='version', help='print program version and exit')
-cmdl_parser.add_option('-u', '--username', dest='username', metavar='USERNAME', help='account username')
-cmdl_parser.add_option('-p', '--password', dest='password', metavar='PASSWORD', help='account password')
-cmdl_parser.add_option('-o', '--output', dest='outfile', metavar='FILE', help='output video file name')
-cmdl_parser.add_option('-q', '--quiet', action='store_true', dest='quiet', help='activates quiet mode')
-cmdl_parser.add_option('-s', '--simulate', action='store_true', dest='simulate', help='do not download video')
-(cmdl_opts, cmdl_args) = cmdl_parser.parse_args()
-
-# Get video URL
-if len(cmdl_args) != 1:
-	cmdl_parser.print_help()
-	sys.exit(exit_failure)
-video_url_cmdl = cmdl_args[0]
-
-# Verify video URL format and convert to "standard" format
-video_url_mo = const_video_url_re.match(video_url_cmdl)
-if video_url_mo is None:
-	sys.exit('Error: URL does not seem to be a youtube video URL. If it is, report a bug.\n')
-video_url_id = video_url_mo.group(1)
-video_url = const_video_url_str % video_url_id
-
-# Check conflicting options
-if not cmdl_opts.outfile is None and cmdl_opts.simulate:
-	sys.stderr.write('Warning: video file name given but will not be used.\n')
-
-# Get output file name 
-if cmdl_opts.outfile is None:
-	video_filename = '%s.flv' % video_url_id
-else:
-	video_filename = cmdl_opts.outfile
-
-# Check name
-if not video_filename.lower().endswith('.flv'):
-	sys.stderr.write('Warning: video file name does not end in .flv\n')
-
-# Verify both or none present
-if ((cmdl_opts.username is None and not cmdl_opts.password is None) or
-    (not cmdl_opts.username is None and cmdl_opts.password is None)):
-	sys.exit('Error: both username and password must be given, or none.')
-
-# Test writable file
-if not cmdl_opts.simulate:
-	try:
-		disk_test = open(video_filename, 'wb')
-		disk_test.close()
+# 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
 
-	except (OSError, IOError):
-		sys.exit('Error: unable to open %s for writing.' % video_filename)
+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',
+}
 
-# Install cookie handler
-urllib2.install_opener(urllib2.build_opener(urllib2.HTTPCookieProcessor()))
+simple_title_chars = string.ascii_letters.decode('ascii') + string.digits.decode('ascii')
 
-# Login and confirm age if needed
-if not cmdl_opts.username is None:
-	try:
-		# Log in
-		cond_print('Logging in... ')
-		perform_request(const_login_url_str, const_login_post_str % (cmdl_opts.username, cmdl_opts.password)).read()
-		cond_print('done.\n')
+def preferredencoding():
+	"""Get preferred encoding.
 
-	except (urllib2.URLError, ValueError):
-		cond_print('failed.\n')
-		error_advice_exit('unable to login')
+	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()
 
-	except KeyboardInterrupt:
-		sys.exit(exit_failure)
+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:
-		# Get age confirmation cookie
-		cond_print('Confirming age... ')
-		perform_request(const_age_url_str % video_url_id, const_age_post_str % video_url_id).read()
-		cond_print('done.\n')
+		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)
 
-	except (urllib2.URLError, ValueError):
-		cond_print('failed.\n')
-		error_advice_exit('unable to confirm age')
+		# An exception here should be caught in the caller
+		stream = open(filename, open_mode)
+		return (stream, filename)
 
-	except KeyboardInterrupt:
-		sys.exit(exit_failure)
+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
 
-# Retrieve video webpage
-try:
-	cond_print('Retrieving video webpage... ')
-	video_webpage = perform_request(video_url).read()
+class DownloadError(Exception):
+	"""Download Error exception.
 
-except (urllib2.URLError, ValueError):
-	cond_print('failed.\n')
-	error_advice_exit('unable to download video webpage')
+	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
 
-except KeyboardInterrupt:
-	sys.exit(exit_failure)
+class SameFileError(Exception):
+	"""Same File exception.
 
-cond_print('done.\n')
+	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
 
-# Extract needed video URL parameters
-try:
-	cond_print('Extracting video URL parameters... ')
-	video_url_params_mo = const_video_url_params_re.search(video_webpage)
+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)
 	
-	if video_url_params_mo is None:
-		cond_print('failed.\n')
-		error_advice_exit('unable to extract URL parameters')
+	@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
 	
-	video_real_id = video_url_params_mo.group(1)
-	video_t_param = video_url_params_mo.group(2)
-	video_url_real = const_video_url_real_str % (video_real_id, video_t_param)
-	cond_print('done.\n')
+	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
 
-except KeyboardInterrupt:
-	sys.exit(exit_failure)
+	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
 
-# Retrieve video data
-try:
-	video_data = perform_request(video_url_real)
-	cond_print('Video data found at %s\n' % video_data.geturl())
+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)
+
+	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)
 
-	# Abort here if in simulate mode
-	if cmdl_opts.simulate:
-		sys.exit()
+		video_extension = 'flv'
 
-	cond_print('Retrieving video data... ')
-	video_file = open(video_filename, 'wb')
+		# 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:
-		video_len_str = '%sk' % to_k(int(video_data.info()['Content-length']))
-	except KeyError:
-		video_len_str = '(unknown)'
-
-	byte_counter = 0
-	video_block = video_data.read(const_block_size)
-	while len(video_block) != 0:
-		byte_counter += len(video_block)
-		video_file.write(video_block)
-		cond_print('\rRetrieving video data... %sk of %s ' % (to_k(byte_counter), video_len_str))
-		video_block = video_data.read(const_block_size)
-
-	video_file.close()
-
-except (urllib2.URLError, ValueError):
-	cond_print('failed.\n')
-	error_advice_exit('unable to download video data')
-
-except KeyboardInterrupt:
-	sys.exit(exit_failure)
-
-cond_print('done.\n')
-cond_print('Video data saved to %s\n' % video_filename)
-sys.exit()
+		# 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')
+
+		# 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()
+
+		# 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)
+
+		# This must come last since it's the
+		# fallback if none of the others work
+		fd.add_info_extractor(generic_ie)
+
+		# PostProcessors
+		if opts.extractaudio:
+			fd.add_post_processor(FFmpegExtractAudioPP(preferredcodec=opts.audioformat))
+
+		# Update version
+		if opts.update_self:
+			update_self(fd, sys.argv[0])
+
+		# Maybe do nothing
+		if len(all_urls) < 1:
+			if not opts.update_self:
+				parser.error(u'you must provide at least one URL')
+			else:
+				sys.exit()
+		retcode = fd.download(all_urls)
+
+		# Dump cookie jar if requested
+		if opts.cookiefile is not None:
+			try:
+				jar.save()
+			except (IOError, OSError), err:
+				sys.exit(u'ERROR: unable to save cookie jar')
+
+		sys.exit(retcode)
+
+	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')