merge upstream
authorFilippo Valsorda <filippo.valsorda@gmail.com>
Tue, 1 May 2012 16:22:08 +0000 (18:22 +0200)
committerFilippo Valsorda <filippo.valsorda@gmail.com>
Tue, 1 May 2012 16:22:08 +0000 (18:22 +0200)
1  2 
youtube_dl/InfoExtractors.py

index 256d106b10409c6fbba199c038b4651bc0e2d36e,0000000000000000000000000000000000000000..01201a145404deadfb74066d47a7296bf3ad2b5b
mode 100644,000000..100644
--- /dev/null
@@@ -1,2899 -1,0 +1,2900 @@@
-       _available_formats = ['38', '37', '22', '45', '35', '44', '34', '18', '43', '6', '5', '17', '13']
-       _available_formats_prefer_free = ['38', '37', '45', '22', '44', '35', '43', '34', '18', '6', '5', '17', '13']
 +#!/usr/bin/env python
 +# -*- coding: utf-8 -*-
 +
 +import datetime
 +import HTMLParser
 +import httplib
 +import netrc
 +import os
 +import re
 +import socket
 +import time
 +import urllib
 +import urllib2
 +import email.utils
 +import xml.etree.ElementTree
 +from urlparse import parse_qs
 +
 +try:
 +      import cStringIO as StringIO
 +except ImportError:
 +      import StringIO
 +
 +from utils import *
 +
 +
 +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 and define a _VALID_URL regexp.
 +      Probably, they should also be added to the list of extractors.
 +      """
 +
 +      _ready = False
 +      _downloader = None
 +
 +      def __init__(self, downloader=None):
 +              """Constructor. Receives an optional downloader."""
 +              self._ready = False
 +              self.set_downloader(downloader)
 +
 +      def suitable(self, url):
 +              """Receives a URL and returns True if suitable for this IE."""
 +              return re.match(self._VALID_URL, url) is not None
 +
 +      def initialize(self):
 +              """Initializes an instance (authentication, etc)."""
 +              if not self._ready:
 +                      self._real_initialize()
 +                      self._ready = True
 +
 +      def extract(self, url):
 +              """Extracts URL information and returns it in list of dicts."""
 +              self.initialize()
 +              return self._real_extract(url)
 +
 +      def set_downloader(self, downloader):
 +              """Sets the downloader for this IE."""
 +              self._downloader = downloader
 +
 +      def _real_initialize(self):
 +              """Real initialization process. Redefine in subclasses."""
 +              pass
 +
 +      def _real_extract(self, url):
 +              """Real extraction process. Redefine in subclasses."""
 +              pass
 +
 +
 +class YoutubeIE(InfoExtractor):
 +      """Information extractor for youtube.com."""
 +
 +      _VALID_URL = r'^((?:https?://)?(?:youtu\.be/|(?:\w+\.)?youtube(?:-nocookie)?\.com/)(?!view_play_list|my_playlists|artist|playlist)(?:(?:(?:v|embed|e)/)|(?:(?:watch(?:_popup)?(?:\.php)?)?(?:\?|#!?)(?:.+&)?v=))?)?([0-9A-Za-z_-]+)(?(1).+)?$'
 +      _LANG_URL = r'http://www.youtube.com/?hl=en&persist_hl=1&gl=US&persist_gl=1&opt_out_ackd=1'
 +      _LOGIN_URL = 'https://www.youtube.com/signup?next=/&gl=US&hl=en'
 +      _AGE_URL = 'http://www.youtube.com/verify_age?next_url=/&gl=US&hl=en'
 +      _NEXT_URL_RE = r'[\?&]next_url=([^&]+)'
 +      _NETRC_MACHINE = 'youtube'
 +      # Listed in order of quality
-       
++      _available_formats = ['38', '37', '46', '22', '45', '35', '44', '34', '18', '43', '6', '5', '17', '13']
++      _available_formats_prefer_free = ['38', '46', '37', '45', '22', '44', '35', '43', '34', '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',
 +              '44': 'webm',
 +              '45': 'webm',
++              '46': 'webm',
 +      }
 +      _video_dimensions = {
 +              '5': '240x400',
 +              '6': '???',
 +              '13': '???',
 +              '17': '144x176',
 +              '18': '360x640',
 +              '22': '720x1280',
 +              '34': '360x640',
 +              '35': '480x854',
 +              '37': '1080x1920',
 +              '38': '3072x4096',
 +              '43': '360x640',
 +              '44': '480x854',
 +              '45': '720x1280',
++              '46': '1080x1920',
 +      }       
 +      IE_NAME = u'youtube'
 +
 +      def report_lang(self):
 +              """Report attempt to set language."""
 +              self._downloader.to_screen(u'[youtube] Setting language')
 +
 +      def report_login(self):
 +              """Report attempt to log in."""
 +              self._downloader.to_screen(u'[youtube] Logging in')
 +
 +      def report_age_confirmation(self):
 +              """Report attempt to confirm age."""
 +              self._downloader.to_screen(u'[youtube] Confirming age')
 +
 +      def report_video_webpage_download(self, video_id):
 +              """Report attempt to download video webpage."""
 +              self._downloader.to_screen(u'[youtube] %s: Downloading video webpage' % video_id)
 +
 +      def report_video_info_webpage_download(self, video_id):
 +              """Report attempt to download video info webpage."""
 +              self._downloader.to_screen(u'[youtube] %s: Downloading video info webpage' % video_id)
 +
 +      def report_video_subtitles_download(self, video_id):
 +              """Report attempt to download video info webpage."""
 +              self._downloader.to_screen(u'[youtube] %s: Downloading video subtitles' % 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 _closed_captions_xml_to_srt(self, xml_string):
 +              srt = ''
 +              texts = re.findall(r'<text start="([\d\.]+)"( dur="([\d\.]+)")?>([^<]+)</text>', xml_string, re.MULTILINE)
 +              # TODO parse xml instead of regex
 +              for n, (start, dur_tag, dur, caption) in enumerate(texts):
 +                      if not dur: dur = '4'
 +                      start = float(start)
 +                      end = start + float(dur)
 +                      start = "%02i:%02i:%02i,%03i" %(start/(60*60), start/60%60, start%60, start%1*1000)
 +                      end = "%02i:%02i:%02i,%03i" %(end/(60*60), end/60%60, end%60, end%1*1000)
 +                      caption = unescapeHTML(caption)
 +                      caption = unescapeHTML(caption) # double cycle, inentional
 +                      srt += str(n) + '\n'
 +                      srt += start + ' --> ' + end + '\n'
 +                      srt += caption + '\n\n'
 +              return srt
 +
 +      def _print_formats(self, formats):
 +              print 'Available formats:'
 +              for x in formats:
 +                      print '%s\t:\t%s\t[%s]' %(x, self._video_extensions.get(x, 'flv'), self._video_dimensions.get(x, '???'))
 +
 +      def _real_initialize(self):
 +              if self._downloader is None:
 +                      return
 +
 +              username = None
 +              password = None
 +              downloader_params = self._downloader.params
 +
 +              # Attempt to use provided username and password or .netrc data
 +              if downloader_params.get('username', None) is not None:
 +                      username = downloader_params['username']
 +                      password = downloader_params['password']
 +              elif downloader_params.get('usenetrc', False):
 +                      try:
 +                              info = netrc.netrc().authenticators(self._NETRC_MACHINE)
 +                              if info is not None:
 +                                      username = info[0]
 +                                      password = info[2]
 +                              else:
 +                                      raise netrc.NetrcParseError('No authenticators for %s' % self._NETRC_MACHINE)
 +                      except (IOError, netrc.NetrcParseError), err:
 +                              self._downloader.to_stderr(u'WARNING: parsing .netrc: %s' % str(err))
 +                              return
 +
 +              # Set language
 +              request = urllib2.Request(self._LANG_URL)
 +              try:
 +                      self.report_lang()
 +                      urllib2.urlopen(request).read()
 +              except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                      self._downloader.to_stderr(u'WARNING: unable to set language: %s' % str(err))
 +                      return
 +
 +              # No authentication to be performed
 +              if username is None:
 +                      return
 +
 +              # Log in
 +              login_form = {
 +                              'current_form': 'loginForm',
 +                              'next':         '/',
 +                              'action_login': 'Log In',
 +                              'username':     username,
 +                              'password':     password,
 +                              }
 +              request = urllib2.Request(self._LOGIN_URL, urllib.urlencode(login_form))
 +              try:
 +                      self.report_login()
 +                      login_results = urllib2.urlopen(request).read()
 +                      if re.search(r'(?i)<form[^>]* name="loginForm"', login_results) is not None:
 +                              self._downloader.to_stderr(u'WARNING: unable to log in: bad username or password')
 +                              return
 +              except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                      self._downloader.to_stderr(u'WARNING: unable to log in: %s' % str(err))
 +                      return
 +
 +              # Confirm age
 +              age_form = {
 +                              'next_url':             '/',
 +                              'action_confirm':       'Confirm',
 +                              }
 +              request = urllib2.Request(self._AGE_URL, urllib.urlencode(age_form))
 +              try:
 +                      self.report_age_confirmation()
 +                      age_results = urllib2.urlopen(request).read()
 +              except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                      self._downloader.trouble(u'ERROR: unable to confirm age: %s' % str(err))
 +                      return
 +
 +      def _real_extract(self, url):
 +              # Extract original video URL from URL with redirection, like age verification, using next_url parameter
 +              mobj = re.search(self._NEXT_URL_RE, url)
 +              if mobj:
 +                      url = 'http://www.youtube.com/' + urllib.unquote(mobj.group(1)).lstrip('/')
 +
 +              # Extract video id from URL
 +              mobj = re.match(self._VALID_URL, url)
 +              if mobj is None:
 +                      self._downloader.trouble(u'ERROR: invalid URL: %s' % url)
 +                      return
 +              video_id = mobj.group(2)
 +
 +              # Get video webpage
 +              self.report_video_webpage_download(video_id)
 +              request = urllib2.Request('http://www.youtube.com/watch?v=%s&gl=US&hl=en&has_verified=1' % video_id)
 +              try:
 +                      video_webpage = urllib2.urlopen(request).read()
 +              except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                      self._downloader.trouble(u'ERROR: unable to download video webpage: %s' % str(err))
 +                      return
 +
 +              # Attempt to extract SWF player URL
 +              mobj = re.search(r'swfConfig.*?"(http:\\/\\/.*?watch.*?-.*?\.swf)"', video_webpage)
 +              if mobj is not None:
 +                      player_url = re.sub(r'\\(.)', r'\1', mobj.group(1))
 +              else:
 +                      player_url = None
 +
 +              # Get video info
 +              self.report_video_info_webpage_download(video_id)
 +              for el_type in ['&el=embedded', '&el=detailpage', '&el=vevo', '']:
 +                      video_info_url = ('http://www.youtube.com/get_video_info?&video_id=%s%s&ps=default&eurl=&gl=US&hl=en'
 +                                      % (video_id, el_type))
 +                      request = urllib2.Request(video_info_url)
 +                      try:
 +                              video_info_webpage = urllib2.urlopen(request).read()
 +                              video_info = parse_qs(video_info_webpage)
 +                              if 'token' in video_info:
 +                                      break
 +                      except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                              self._downloader.trouble(u'ERROR: unable to download video info webpage: %s' % str(err))
 +                              return
 +              if 'token' not in video_info:
 +                      if 'reason' in video_info:
 +                              self._downloader.trouble(u'ERROR: YouTube said: %s' % video_info['reason'][0].decode('utf-8'))
 +                      else:
 +                              self._downloader.trouble(u'ERROR: "token" parameter not in video info for unknown reason')
 +                      return
 +
 +              # Start extracting information
 +              self.report_information_extraction(video_id)
 +
 +              # uploader
 +              if 'author' not in video_info:
 +                      self._downloader.trouble(u'ERROR: unable to extract uploader nickname')
 +                      return
 +              video_uploader = urllib.unquote_plus(video_info['author'][0])
 +
 +              # title
 +              if 'title' not in video_info:
 +                      self._downloader.trouble(u'ERROR: unable to extract video title')
 +                      return
 +              video_title = urllib.unquote_plus(video_info['title'][0])
 +              video_title = video_title.decode('utf-8')
 +              video_title = sanitize_title(video_title)
 +
 +              # simplified title
 +              simple_title = simplify_title(video_title)
 +
 +              # 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 = get_element_by_id("eow-description", video_webpage.decode('utf8'))
 +              if video_description: video_description = clean_html(video_description)
 +              else: video_description = ''
 +                      
 +              # closed captions
 +              video_subtitles = None
 +              if self._downloader.params.get('writesubtitles', False):
 +                      self.report_video_subtitles_download(video_id)
 +                      request = urllib2.Request('http://video.google.com/timedtext?hl=en&type=list&v=%s' % video_id)
 +                      try:
 +                              srt_list = urllib2.urlopen(request).read()
 +                      except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                              self._downloader.trouble(u'WARNING: unable to download video subtitles: %s' % str(err))
 +                      else:
 +                              srt_lang_list = re.findall(r'lang_code="([\w\-]+)"', srt_list)
 +                              if srt_lang_list:
 +                                      if self._downloader.params.get('subtitleslang', False):
 +                                              srt_lang = self._downloader.params.get('subtitleslang')
 +                                      elif 'en' in srt_lang_list:
 +                                              srt_lang = 'en'
 +                                      else:
 +                                              srt_lang = srt_lang_list[0]
 +                                      if not srt_lang in srt_lang_list:
 +                                              self._downloader.trouble(u'WARNING: no closed captions found in the specified language')
 +                                      else:
 +                                              request = urllib2.Request('http://video.google.com/timedtext?hl=en&lang=%s&v=%s' % (srt_lang, video_id))
 +                                              try:
 +                                                      srt_xml = urllib2.urlopen(request).read()
 +                                              except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                                                      self._downloader.trouble(u'WARNING: unable to download video subtitles: %s' % str(err))
 +                                              else:
 +                                                      video_subtitles = self._closed_captions_xml_to_srt(srt_xml.decode('utf-8'))
 +                              else:
 +                                      self._downloader.trouble(u'WARNING: video has no closed captions')
 +
 +              # token
 +              video_token = urllib.unquote_plus(video_info['token'][0])
 +
 +              # Decide which formats to download
 +              req_format = self._downloader.params.get('format', None)
 +
 +              if 'conn' in video_info and video_info['conn'][0].startswith('rtmp'):
 +                      self.report_rtmp_download()
 +                      video_url_list = [(None, video_info['conn'][0])]
 +              elif 'url_encoded_fmt_stream_map' in video_info and len(video_info['url_encoded_fmt_stream_map']) >= 1:
 +                      url_data_strs = video_info['url_encoded_fmt_stream_map'][0].split(',')
 +                      url_data = [parse_qs(uds) for uds in url_data_strs]
 +                      url_data = filter(lambda ud: 'itag' in ud and 'url' in ud, url_data)
 +                      url_map = dict((ud['itag'][0], ud['url'][0]) for ud in url_data)
 +
 +                      format_limit = self._downloader.params.get('format_limit', None)
 +                      available_formats = self._available_formats_prefer_free if self._downloader.params.get('prefer_free_formats', False) else self._available_formats
 +                      if format_limit is not None and format_limit in available_formats:
 +                              format_list = available_formats[available_formats.index(format_limit):]
 +                      else:
 +                              format_list = available_formats
 +                      existing_formats = [x for x in format_list if x in url_map]
 +                      if len(existing_formats) == 0:
 +                              self._downloader.trouble(u'ERROR: no known formats available for video')
 +                              return
 +                      if self._downloader.params.get('listformats', None):
 +                              self._print_formats(existing_formats)
 +                              return
 +                      if req_format is None or req_format == 'best':
 +                              video_url_list = [(existing_formats[0], url_map[existing_formats[0]])] # Best quality
 +                      elif req_format == 'worst':
 +                              video_url_list = [(existing_formats[len(existing_formats)-1], url_map[existing_formats[len(existing_formats)-1]])] # worst quality
 +                      elif req_format in ('-1', 'all'):
 +                              video_url_list = [(f, url_map[f]) for f in existing_formats] # All formats
 +                      else:
 +                              # Specific formats. We pick the first in a slash-delimeted sequence.
 +                              # For example, if '1/2/3/4' is requested and '2' and '4' are available, we pick '2'.
 +                              req_formats = req_format.split('/')
 +                              video_url_list = None
 +                              for rf in req_formats:
 +                                      if rf in url_map:
 +                                              video_url_list = [(rf, url_map[rf])]
 +                                              break
 +                              if video_url_list is None:
 +                                      self._downloader.trouble(u'ERROR: requested format not available')
 +                                      return
 +              else:
 +                      self._downloader.trouble(u'ERROR: no conn or url_encoded_fmt_stream_map information found in video info')
 +                      return
 +
 +              results = []
 +              for format_param, video_real_url in video_url_list:
 +                      # Extension
 +                      video_extension = self._video_extensions.get(format_param, 'flv')
 +
 +                      results.append({
 +                              'id':           video_id.decode('utf-8'),
 +                              'url':          video_real_url.decode('utf-8'),
 +                              'uploader':     video_uploader.decode('utf-8'),
 +                              'upload_date':  upload_date,
 +                              'title':        video_title,
 +                              'stitle':       simple_title,
 +                              'ext':          video_extension.decode('utf-8'),
 +                              'format':       (format_param is None and u'NA' or format_param.decode('utf-8')),
 +                              'thumbnail':    video_thumbnail.decode('utf-8'),
 +                              'description':  video_description,
 +                              'player_url':   player_url,
 +                              'subtitles':    video_subtitles
 +                      })
 +              return results
 +
 +
 +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'
 +      IE_NAME = u'metacafe'
 +
 +      def __init__(self, downloader=None):
 +              InfoExtractor.__init__(self, downloader)
 +
 +      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._downloader.download(['http://www.youtube.com/watch?v=%s' % mobj2.group(1)])
 +                      return
 +
 +              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)
 +
 +              return [{
 +                      '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,
 +              }]
 +
 +
 +class DailymotionIE(InfoExtractor):
 +      """Information Extractor for Dailymotion"""
 +
 +      _VALID_URL = r'(?i)(?:https?://)?(?:www\.)?dailymotion\.[a-z]{2,3}/video/([^_/]+)_([^/]+)'
 +      IE_NAME = u'dailymotion'
 +
 +      def __init__(self, downloader=None):
 +              InfoExtractor.__init__(self, downloader)
 +
 +      def report_download_webpage(self, video_id):
 +              """Report webpage download."""
 +              self._downloader.to_screen(u'[dailymotion] %s: Downloading webpage' % video_id)
 +
 +      def report_extraction(self, video_id):
 +              """Report information extraction."""
 +              self._downloader.to_screen(u'[dailymotion] %s: Extracting information' % video_id)
 +
 +      def _real_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)
 +
 +              video_extension = 'flv'
 +
 +              # Retrieve video webpage to extract further information
 +              request = urllib2.Request(url)
 +              request.add_header('Cookie', 'family_filter=off')
 +              try:
 +                      self.report_download_webpage(video_id)
 +                      webpage = urllib2.urlopen(request).read()
 +              except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                      self._downloader.trouble(u'ERROR: unable retrieve video webpage: %s' % str(err))
 +                      return
 +
 +              # Extract URL, uploader and title from webpage
 +              self.report_extraction(video_id)
 +              mobj = re.search(r'(?i)addVariable\(\"sequence\"\s*,\s*\"([^\"]+?)\"\)', webpage)
 +              if mobj is None:
 +                      self._downloader.trouble(u'ERROR: unable to extract media URL')
 +                      return
 +              sequence = urllib.unquote(mobj.group(1))
 +              mobj = re.search(r',\"sdURL\"\:\"([^\"]+?)\",', sequence)
 +              if mobj is None:
 +                      self._downloader.trouble(u'ERROR: unable to extract media URL')
 +                      return
 +              mediaURL = urllib.unquote(mobj.group(1)).replace('\\', '')
 +
 +              # if needed add http://www.dailymotion.com/ if relative URL
 +
 +              video_url = mediaURL
 +
 +              mobj = re.search(r'<meta property="og:title" content="(?P<title>[^"]*)" />', webpage)
 +              if mobj is None:
 +                      self._downloader.trouble(u'ERROR: unable to extract title')
 +                      return
 +              video_title = unescapeHTML(mobj.group('title').decode('utf-8'))
 +              video_title = sanitize_title(video_title)
 +              simple_title = simplify_title(video_title)
 +
 +              mobj = re.search(r'(?im)<span class="owner[^\"]+?">[^<]+?<a [^>]+?>([^<]+?)</a></span>', webpage)
 +              if mobj is None:
 +                      self._downloader.trouble(u'ERROR: unable to extract uploader nickname')
 +                      return
 +              video_uploader = mobj.group(1)
 +
 +              return [{
 +                      '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,
 +              }]
 +
 +
 +class GoogleIE(InfoExtractor):
 +      """Information extractor for video.google.com."""
 +
 +      _VALID_URL = r'(?:http://)?video\.google\.(?:com(?:\.au)?|co\.(?:uk|jp|kr|cr)|ca|de|es|fr|it|nl|pl)/videoplay\?docid=([^\&]+).*'
 +      IE_NAME = u'video.google'
 +
 +      def __init__(self, downloader=None):
 +              InfoExtractor.__init__(self, downloader)
 +
 +      def report_download_webpage(self, video_id):
 +              """Report webpage download."""
 +              self._downloader.to_screen(u'[video.google] %s: Downloading webpage' % video_id)
 +
 +      def report_extraction(self, video_id):
 +              """Report information extraction."""
 +              self._downloader.to_screen(u'[video.google] %s: Extracting information' % video_id)
 +
 +      def _real_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
 +
 +              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 = simplify_title(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 = ''
 +
 +              return [{
 +                      '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,
 +              }]
 +
 +
 +class PhotobucketIE(InfoExtractor):
 +      """Information extractor for photobucket.com."""
 +
 +      _VALID_URL = r'(?:http://)?(?:[a-z0-9]+\.)?photobucket\.com/.*[\?\&]current=(.*\.flv)'
 +      IE_NAME = u'photobucket'
 +
 +      def __init__(self, downloader=None):
 +              InfoExtractor.__init__(self, downloader)
 +
 +      def report_download_webpage(self, video_id):
 +              """Report webpage download."""
 +              self._downloader.to_screen(u'[photobucket] %s: Downloading webpage' % video_id)
 +
 +      def report_extraction(self, video_id):
 +              """Report information extraction."""
 +              self._downloader.to_screen(u'[photobucket] %s: Extracting information' % video_id)
 +
 +      def _real_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
 +
 +              video_id = mobj.group(1)
 +
 +              video_extension = 'flv'
 +
 +              # Retrieve video webpage to extract further information
 +              request = urllib2.Request(url)
 +              try:
 +                      self.report_download_webpage(video_id)
 +                      webpage = urllib2.urlopen(request).read()
 +              except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                      self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % str(err))
 +                      return
 +
 +              # Extract URL, uploader, and title from webpage
 +              self.report_extraction(video_id)
 +              mobj = re.search(r'<link rel="video_src" href=".*\?file=([^"]+)" />', webpage)
 +              if mobj is None:
 +                      self._downloader.trouble(u'ERROR: unable to extract media URL')
 +                      return
 +              mediaURL = urllib.unquote(mobj.group(1))
 +
 +              video_url = mediaURL
 +
 +              mobj = re.search(r'<title>(.*) video by (.*) - Photobucket</title>', webpage)
 +              if mobj is None:
 +                      self._downloader.trouble(u'ERROR: unable to extract title')
 +                      return
 +              video_title = mobj.group(1).decode('utf-8')
 +              video_title = sanitize_title(video_title)
 +              simple_title = simplify_title(video_title)
 +
 +              video_uploader = mobj.group(2).decode('utf-8')
 +
 +              return [{
 +                      '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,
 +              }]
 +
 +
 +class YahooIE(InfoExtractor):
 +      """Information extractor for video.yahoo.com."""
 +
 +      # _VALID_URL matches all Yahoo! Video URLs
 +      # _VPAGE_URL matches only the extractable '/watch/' URLs
 +      _VALID_URL = r'(?:http://)?(?:[a-z]+\.)?video\.yahoo\.com/(?:watch|network)/([0-9]+)(?:/|\?v=)([0-9]+)(?:[#\?].*)?'
 +      _VPAGE_URL = r'(?:http://)?video\.yahoo\.com/watch/([0-9]+)/([0-9]+)(?:[#\?].*)?'
 +      IE_NAME = u'video.yahoo'
 +
 +      def __init__(self, downloader=None):
 +              InfoExtractor.__init__(self, downloader)
 +
 +      def report_download_webpage(self, video_id):
 +              """Report webpage download."""
 +              self._downloader.to_screen(u'[video.yahoo] %s: Downloading webpage' % video_id)
 +
 +      def report_extraction(self, video_id):
 +              """Report information extraction."""
 +              self._downloader.to_screen(u'[video.yahoo] %s: Extracting information' % video_id)
 +
 +      def _real_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
 +
 +              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 = simplify_title(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 = unescapeHTML(video_url)
 +
 +              return [{
 +                      'id':           video_id.decode('utf-8'),
 +                      'url':          video_url,
 +                      'uploader':     video_uploader,
 +                      'upload_date':  u'NA',
 +                      'title':        video_title,
 +                      'stitle':       simple_title,
 +                      'ext':          video_extension.decode('utf-8'),
 +                      'thumbnail':    video_thumbnail.decode('utf-8'),
 +                      'description':  video_description,
 +                      'thumbnail':    video_thumbnail,
 +                      'player_url':   None,
 +              }]
 +
 +
 +class VimeoIE(InfoExtractor):
 +      """Information extractor for vimeo.com."""
 +
 +      # _VALID_URL matches Vimeo URLs
 +      _VALID_URL = r'(?:https?://)?(?:(?:www|player).)?vimeo\.com/(?:groups/[^/]+/)?(?:videos?/)?([0-9]+)'
 +      IE_NAME = u'vimeo'
 +
 +      def __init__(self, downloader=None):
 +              InfoExtractor.__init__(self, downloader)
 +
 +      def report_download_webpage(self, video_id):
 +              """Report webpage download."""
 +              self._downloader.to_screen(u'[vimeo] %s: Downloading webpage' % video_id)
 +
 +      def report_extraction(self, video_id):
 +              """Report information extraction."""
 +              self._downloader.to_screen(u'[vimeo] %s: Extracting information' % video_id)
 +
 +      def _real_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
 +
 +              video_id = mobj.group(1)
 +
 +              # Retrieve video webpage to extract further information
 +              request = urllib2.Request(url, None, std_headers)
 +              try:
 +                      self.report_download_webpage(video_id)
 +                      webpage = urllib2.urlopen(request).read()
 +              except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                      self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % str(err))
 +                      return
 +
 +              # Now we begin extracting as much information as we can from what we
 +              # retrieved. First we extract the information common to all extractors,
 +              # and latter we extract those that are Vimeo specific.
 +              self.report_extraction(video_id)
 +
 +              # Extract the config JSON
 +              config = webpage.split(' = {config:')[1].split(',assets:')[0]
 +              try:
 +                      config = json.loads(config)
 +              except:
 +                      self._downloader.trouble(u'ERROR: unable to extract info section')
 +                      return
 +              
 +              # Extract title
 +              video_title = config["video"]["title"]
 +              simple_title = simplify_title(video_title)
 +
 +              # Extract uploader
 +              video_uploader = config["video"]["owner"]["name"]
 +
 +              # Extract video thumbnail
 +              video_thumbnail = config["video"]["thumbnail"]
 +
 +              # Extract video description
 +              video_description = get_element_by_id("description", webpage.decode('utf8'))
 +              if video_description: video_description = clean_html(video_description)
 +              else: video_description = ''
 +
 +              # Extract upload date
 +              video_upload_date = u'NA'
 +              mobj = re.search(r'<span id="clip-date" style="display:none">[^:]*: (.*?)( \([^\(]*\))?</span>', webpage)
 +              if mobj is not None:
 +                      video_upload_date = mobj.group(1)
 +
 +              # Vimeo specific: extract request signature and timestamp
 +              sig = config['request']['signature']
 +              timestamp = config['request']['timestamp']
 +
 +              # Vimeo specific: extract video codec and quality information
 +              # TODO bind to format param
 +              codecs = [('h264', 'mp4'), ('vp8', 'flv'), ('vp6', 'flv')]
 +              for codec in codecs:
 +                      if codec[0] in config["video"]["files"]:
 +                              video_codec = codec[0]
 +                              video_extension = codec[1]
 +                              if 'hd' in config["video"]["files"][codec[0]]: quality = 'hd'
 +                              else: quality = 'sd'
 +                              break
 +              else:
 +                      self._downloader.trouble(u'ERROR: no known codec found')
 +                      return
 +
 +              video_url = "http://player.vimeo.com/play_redirect?clip_id=%s&sig=%s&time=%s&quality=%s&codecs=%s&type=moogaloop_local&embed_location=" \
 +                                      %(video_id, sig, timestamp, quality, video_codec.upper())
 +
 +              return [{
 +                      'id':           video_id,
 +                      'url':          video_url,
 +                      'uploader':     video_uploader,
 +                      'upload_date':  video_upload_date,
 +                      'title':        video_title,
 +                      'stitle':       simple_title,
 +                      'ext':          video_extension,
 +                      'thumbnail':    video_thumbnail,
 +                      'description':  video_description,
 +                      'player_url':   None,
 +              }]
 +
 +
 +class GenericIE(InfoExtractor):
 +      """Generic last-resort information extractor."""
 +
 +      _VALID_URL = r'.*'
 +      IE_NAME = u'generic'
 +
 +      def __init__(self, downloader=None):
 +              InfoExtractor.__init__(self, downloader)
 +
 +      def report_download_webpage(self, video_id):
 +              """Report webpage download."""
 +              self._downloader.to_screen(u'WARNING: Falling back on generic information extractor.')
 +              self._downloader.to_screen(u'[generic] %s: Downloading webpage' % video_id)
 +
 +      def report_extraction(self, video_id):
 +              """Report information extraction."""
 +              self._downloader.to_screen(u'[generic] %s: Extracting information' % video_id)
 +
 +      def report_following_redirect(self, new_url):
 +              """Report information extraction."""
 +              self._downloader.to_screen(u'[redirect] Following redirect to %s' % new_url)
 +              
 +      def _test_redirect(self, url):
 +              """Check if it is a redirect, like url shorteners, in case restart chain."""
 +              class HeadRequest(urllib2.Request):
 +                      def get_method(self):
 +                              return "HEAD"
 +
 +              class HEADRedirectHandler(urllib2.HTTPRedirectHandler):
 +                      """
 +                      Subclass the HTTPRedirectHandler to make it use our 
 +                      HeadRequest also on the redirected URL
 +                      """
 +                      def redirect_request(self, req, fp, code, msg, headers, newurl): 
 +                              if code in (301, 302, 303, 307):
 +                                      newurl = newurl.replace(' ', '%20') 
 +                                      newheaders = dict((k,v) for k,v in req.headers.items()
 +                                                                        if k.lower() not in ("content-length", "content-type"))
 +                                      return HeadRequest(newurl, 
 +                                                                         headers=newheaders,
 +                                                                         origin_req_host=req.get_origin_req_host(), 
 +                                                                         unverifiable=True) 
 +                              else: 
 +                                      raise urllib2.HTTPError(req.get_full_url(), code, msg, headers, fp) 
 +
 +              class HTTPMethodFallback(urllib2.BaseHandler):
 +                      """
 +                      Fallback to GET if HEAD is not allowed (405 HTTP error)
 +                      """
 +                      def http_error_405(self, req, fp, code, msg, headers): 
 +                              fp.read()
 +                              fp.close()
 +
 +                              newheaders = dict((k,v) for k,v in req.headers.items()
 +                                                                if k.lower() not in ("content-length", "content-type"))
 +                              return self.parent.open(urllib2.Request(req.get_full_url(), 
 +                                                                                               headers=newheaders, 
 +                                                                                               origin_req_host=req.get_origin_req_host(), 
 +                                                                                               unverifiable=True))
 +
 +              # Build our opener
 +              opener = urllib2.OpenerDirector() 
 +              for handler in [urllib2.HTTPHandler, urllib2.HTTPDefaultErrorHandler,
 +                                              HTTPMethodFallback, HEADRedirectHandler,
 +                                              urllib2.HTTPErrorProcessor, urllib2.HTTPSHandler]:
 +                      opener.add_handler(handler())
 +
 +              response = opener.open(HeadRequest(url))
 +              new_url = response.geturl()
 +              
 +              if url == new_url: return False
 +              
 +              self.report_following_redirect(new_url)
 +              self._downloader.download([new_url])
 +              return True
 +
 +      def _real_extract(self, url):
 +              if self._test_redirect(url): return
 +
 +              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 = simplify_title(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')
 +
 +              return [{
 +                      '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,
 +              }]
 +
 +
 +class YoutubeSearchIE(InfoExtractor):
 +      """Information Extractor for YouTube search queries."""
 +      _VALID_URL = r'ytsearch(\d+|all)?:[\s\S]+'
 +      _API_URL = 'https://gdata.youtube.com/feeds/api/videos?q=%s&start-index=%i&max-results=50&v=2&alt=jsonc'
 +      _max_youtube_results = 1000
 +      IE_NAME = u'youtube:search'
 +
 +      def __init__(self, downloader=None):
 +              InfoExtractor.__init__(self, downloader)
 +
 +      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_extract(self, query):
 +              mobj = re.match(self._VALID_URL, query)
 +              if mobj is None:
 +                      self._downloader.trouble(u'ERROR: invalid search query "%s"' % query)
 +                      return
 +
 +              prefix, query = query.split(':')
 +              prefix = prefix[8:]
 +              query = query.encode('utf-8')
 +              if prefix == '':
 +                      self._download_n_results(query, 1)
 +                      return
 +              elif prefix == 'all':
 +                      self._download_n_results(query, self._max_youtube_results)
 +                      return
 +              else:
 +                      try:
 +                              n = long(prefix)
 +                              if n <= 0:
 +                                      self._downloader.trouble(u'ERROR: invalid download number %s for query "%s"' % (n, query))
 +                                      return
 +                              elif n > self._max_youtube_results:
 +                                      self._downloader.to_stderr(u'WARNING: ytsearch returns max %i results (you requested %i)' % (self._max_youtube_results, n))
 +                                      n = self._max_youtube_results
 +                              self._download_n_results(query, n)
 +                              return
 +                      except ValueError: # parsing prefix as integer fails
 +                              self._download_n_results(query, 1)
 +                              return
 +
 +      def _download_n_results(self, query, n):
 +              """Downloads a specified number of results for a query"""
 +
 +              video_ids = []
 +              pagenum = 0
 +              limit = n
 +
 +              while (50 * pagenum) < limit:
 +                      self.report_download_page(query, pagenum+1)
 +                      result_url = self._API_URL % (urllib.quote_plus(query), (50*pagenum)+1)
 +                      request = urllib2.Request(result_url)
 +                      try:
 +                              data = urllib2.urlopen(request).read()
 +                      except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                              self._downloader.trouble(u'ERROR: unable to download API page: %s' % str(err))
 +                              return
 +                      api_response = json.loads(data)['data']
 +
 +                      new_ids = list(video['id'] for video in api_response['items'])
 +                      video_ids += new_ids
 +
 +                      limit = min(n, api_response['totalItems'])
 +                      pagenum += 1
 +
 +              if len(video_ids) > n:
 +                      video_ids = video_ids[:n]
 +              for id in video_ids:
 +                      self._downloader.download(['http://www.youtube.com/watch?v=%s' % id])
 +              return
 +
 +
 +class GoogleSearchIE(InfoExtractor):
 +      """Information Extractor for Google Video search queries."""
 +      _VALID_URL = r'gvsearch(\d+|all)?:[\s\S]+'
 +      _TEMPLATE_URL = 'http://video.google.com/videosearch?q=%s+site:video.google.com&start=%s&hl=en'
 +      _VIDEO_INDICATOR = r'<a href="http://video\.google\.com/videoplay\?docid=([^"\&]+)'
 +      _MORE_PAGES_INDICATOR = r'class="pn" id="pnnext"'
 +      _max_google_results = 1000
 +      IE_NAME = u'video.google:search'
 +
 +      def __init__(self, downloader=None):
 +              InfoExtractor.__init__(self, downloader)
 +
 +      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_extract(self, query):
 +              mobj = re.match(self._VALID_URL, query)
 +              if mobj is None:
 +                      self._downloader.trouble(u'ERROR: invalid search query "%s"' % query)
 +                      return
 +
 +              prefix, query = query.split(':')
 +              prefix = prefix[8:]
 +              query = query.encode('utf-8')
 +              if prefix == '':
 +                      self._download_n_results(query, 1)
 +                      return
 +              elif prefix == 'all':
 +                      self._download_n_results(query, self._max_google_results)
 +                      return
 +              else:
 +                      try:
 +                              n = long(prefix)
 +                              if n <= 0:
 +                                      self._downloader.trouble(u'ERROR: invalid download number %s for query "%s"' % (n, query))
 +                                      return
 +                              elif n > self._max_google_results:
 +                                      self._downloader.to_stderr(u'WARNING: gvsearch returns max %i results (you requested %i)' % (self._max_google_results, n))
 +                                      n = self._max_google_results
 +                              self._download_n_results(query, n)
 +                              return
 +                      except ValueError: # parsing prefix as integer fails
 +                              self._download_n_results(query, 1)
 +                              return
 +
 +      def _download_n_results(self, query, n):
 +              """Downloads a specified number of results for a query"""
 +
 +              video_ids = []
 +              pagenum = 0
 +
 +              while True:
 +                      self.report_download_page(query, pagenum)
 +                      result_url = self._TEMPLATE_URL % (urllib.quote_plus(query), pagenum*10)
 +                      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 video_ids:
 +                                      video_ids.append(video_id)
 +                                      if len(video_ids) == n:
 +                                              # Specified n videos reached
 +                                              for id in video_ids:
 +                                                      self._downloader.download(['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._downloader.download(['http://video.google.com/videoplay?docid=%s' % id])
 +                              return
 +
 +                      pagenum = pagenum + 1
 +
 +
 +class YahooSearchIE(InfoExtractor):
 +      """Information Extractor for Yahoo! Video search queries."""
 +      _VALID_URL = r'yvsearch(\d+|all)?:[\s\S]+'
 +      _TEMPLATE_URL = 'http://video.yahoo.com/search/?p=%s&o=%s'
 +      _VIDEO_INDICATOR = r'href="http://video\.yahoo\.com/watch/([0-9]+/[0-9]+)"'
 +      _MORE_PAGES_INDICATOR = r'\s*Next'
 +      _max_yahoo_results = 1000
 +      IE_NAME = u'video.yahoo:search'
 +
 +      def __init__(self, downloader=None):
 +              InfoExtractor.__init__(self, downloader)
 +
 +      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_extract(self, query):
 +              mobj = re.match(self._VALID_URL, query)
 +              if mobj is None:
 +                      self._downloader.trouble(u'ERROR: invalid search query "%s"' % query)
 +                      return
 +
 +              prefix, query = query.split(':')
 +              prefix = prefix[8:]
 +              query = query.encode('utf-8')
 +              if prefix == '':
 +                      self._download_n_results(query, 1)
 +                      return
 +              elif prefix == 'all':
 +                      self._download_n_results(query, self._max_yahoo_results)
 +                      return
 +              else:
 +                      try:
 +                              n = long(prefix)
 +                              if n <= 0:
 +                                      self._downloader.trouble(u'ERROR: invalid download number %s for query "%s"' % (n, query))
 +                                      return
 +                              elif n > self._max_yahoo_results:
 +                                      self._downloader.to_stderr(u'WARNING: yvsearch returns max %i results (you requested %i)' % (self._max_yahoo_results, n))
 +                                      n = self._max_yahoo_results
 +                              self._download_n_results(query, n)
 +                              return
 +                      except ValueError: # parsing prefix as integer fails
 +                              self._download_n_results(query, 1)
 +                              return
 +
 +      def _download_n_results(self, query, n):
 +              """Downloads a specified number of results for a query"""
 +
 +              video_ids = []
 +              already_seen = set()
 +              pagenum = 1
 +
 +              while True:
 +                      self.report_download_page(query, pagenum)
 +                      result_url = self._TEMPLATE_URL % (urllib.quote_plus(query), pagenum)
 +                      request = urllib2.Request(result_url)
 +                      try:
 +                              page = urllib2.urlopen(request).read()
 +                      except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                              self._downloader.trouble(u'ERROR: unable to download webpage: %s' % str(err))
 +                              return
 +
 +                      # Extract video identifiers
 +                      for mobj in re.finditer(self._VIDEO_INDICATOR, page):
 +                              video_id = mobj.group(1)
 +                              if video_id not in already_seen:
 +                                      video_ids.append(video_id)
 +                                      already_seen.add(video_id)
 +                                      if len(video_ids) == n:
 +                                              # Specified n videos reached
 +                                              for id in video_ids:
 +                                                      self._downloader.download(['http://video.yahoo.com/watch/%s' % id])
 +                                              return
 +
 +                      if re.search(self._MORE_PAGES_INDICATOR, page) is None:
 +                              for id in video_ids:
 +                                      self._downloader.download(['http://video.yahoo.com/watch/%s' % id])
 +                              return
 +
 +                      pagenum = pagenum + 1
 +
 +
 +class YoutubePlaylistIE(InfoExtractor):
 +      """Information Extractor for YouTube playlists."""
 +
 +      _VALID_URL = r'(?:https?://)?(?:\w+\.)?youtube\.com/(?:(?:course|view_play_list|my_playlists|artist|playlist)\?.*?(p|a|list)=|user/.*?/user/|p/|user/.*?#[pg]/c/)(?:PL)?([0-9A-Za-z-_]+)(?:/.*?/([0-9A-Za-z_-]+))?.*'
 +      _TEMPLATE_URL = 'http://www.youtube.com/%s?%s=%s&page=%s&gl=US&hl=en'
 +      _VIDEO_INDICATOR_TEMPLATE = r'/watch\?v=(.+?)&amp;list=PL%s&'
 +      _MORE_PAGES_INDICATOR = r'(?m)>\s*Next\s*</a>'
 +      IE_NAME = u'youtube:playlist'
 +
 +      def __init__(self, downloader=None):
 +              InfoExtractor.__init__(self, downloader)
 +
 +      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_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._downloader.download([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)
 +                      url = self._TEMPLATE_URL % (playlist_access, playlist_prefix, playlist_id, pagenum)
 +                      request = urllib2.Request(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
 +                      ids_in_page = []
 +                      for mobj in re.finditer(self._VIDEO_INDICATOR_TEMPLATE % playlist_id, 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)
 +              if playlistend == -1:
 +                      video_ids = video_ids[playliststart:]
 +              else:
 +                      video_ids = video_ids[playliststart:playlistend]
 +
 +              for id in video_ids:
 +                      self._downloader.download(['http://www.youtube.com/watch?v=%s' % id])
 +              return
 +
 +
 +class YoutubeUserIE(InfoExtractor):
 +      """Information Extractor for YouTube users."""
 +
 +      _VALID_URL = r'(?:(?:(?:https?://)?(?:\w+\.)?youtube\.com/user/)|ytuser:)([A-Za-z0-9_-]+)'
 +      _TEMPLATE_URL = 'http://gdata.youtube.com/feeds/api/users/%s'
 +      _GDATA_PAGE_SIZE = 50
 +      _GDATA_URL = 'http://gdata.youtube.com/feeds/api/users/%s/uploads?max-results=%d&start-index=%d'
 +      _VIDEO_INDICATOR = r'/watch\?v=(.+?)[\<&]'
 +      IE_NAME = u'youtube:user'
 +
 +      def __init__(self, downloader=None):
 +              InfoExtractor.__init__(self, downloader)
 +
 +      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_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(u"[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._downloader.download(['http://www.youtube.com/watch?v=%s' % video_id])
 +
 +
 +class DepositFilesIE(InfoExtractor):
 +      """Information extractor for depositfiles.com"""
 +
 +      _VALID_URL = r'(?:http://)?(?:\w+\.)?depositfiles\.com/(?:../(?#locale))?files/(.+)'
 +      IE_NAME = u'DepositFiles'
 +
 +      def __init__(self, downloader=None):
 +              InfoExtractor.__init__(self, downloader)
 +
 +      def report_download_webpage(self, file_id):
 +              """Report webpage download."""
 +              self._downloader.to_screen(u'[DepositFiles] %s: Downloading webpage' % file_id)
 +
 +      def report_extraction(self, file_id):
 +              """Report information extraction."""
 +              self._downloader.to_screen(u'[DepositFiles] %s: Extracting information' % file_id)
 +
 +      def _real_extract(self, url):
 +              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')
 +
 +              return [{
 +                      '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,
 +              }]
 +
 +
 +class FacebookIE(InfoExtractor):
 +      """Information Extractor for Facebook"""
 +
 +      _VALID_URL = r'^(?:https?://)?(?:\w+\.)?facebook\.com/(?:video/video|photo)\.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 = ['video', 'highqual', 'lowqual']
 +      _video_extensions = {
 +              'video': 'mp4',
 +              'highqual': 'mp4',
 +              'lowqual': 'mp4',
 +      }
 +      IE_NAME = u'facebook'
 +
 +      def __init__(self, downloader=None):
 +              InfoExtractor.__init__(self, downloader)
 +
 +      def _reporter(self, message):
 +              """Add header and report message."""
 +              self._downloader.to_screen(u'[facebook] %s' % message)
 +
 +      def report_login(self):
 +              """Report attempt to log in."""
 +              self._reporter(u'Logging in')
 +
 +      def report_video_webpage_download(self, video_id):
 +              """Report attempt to download video webpage."""
 +              self._reporter(u'%s: Downloading video webpage' % video_id)
 +
 +      def report_information_extraction(self, video_id):
 +              """Report attempt to extract video information."""
 +              self._reporter(u'%s: Extracting video information' % video_id)
 +
 +      def _parse_page(self, video_webpage):
 +              """Extract video information from page"""
 +              # General data
 +              data = {'title': r'\("video_title", "(.*?)"\)',
 +                      'description': r'<div class="datawrap">(.*?)</div>',
 +                      'owner': r'\("video_owner_name", "(.*?)"\)',
 +                      '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)
 +
 +              simple_title = simplify_title(video_title)
 +
 +              # thumbnail image
 +              if 'thumbnail' not in video_info:
 +                      self._downloader.trouble(u'WARNING: unable to extract video thumbnail')
 +                      video_thumbnail = ''
 +              else:
 +                      video_thumbnail = video_info['thumbnail']
 +
 +              # upload date
 +              upload_date = u'NA'
 +              if 'upload_date' in video_info:
 +                      upload_time = video_info['upload_date']
 +                      timetuple = email.utils.parsedate_tz(upload_time)
 +                      if timetuple is not None:
 +                              try:
 +                                      upload_date = time.strftime('%Y%m%d', timetuple[0:9])
 +                              except:
 +                                      pass
 +
 +              # description
 +              video_description = video_info.get('description', 'No description available.')
 +
 +              url_map = video_info['video_urls']
 +              if len(url_map.keys()) > 0:
 +                      # Decide which formats to download
 +                      req_format = self._downloader.params.get('format', None)
 +                      format_limit = self._downloader.params.get('format_limit', None)
 +
 +                      if format_limit is not None and format_limit in self._available_formats:
 +                              format_list = self._available_formats[self._available_formats.index(format_limit):]
 +                      else:
 +                              format_list = self._available_formats
 +                      existing_formats = [x for x in format_list if x in url_map]
 +                      if len(existing_formats) == 0:
 +                              self._downloader.trouble(u'ERROR: no known formats available for video')
 +                              return
 +                      if req_format is None:
 +                              video_url_list = [(existing_formats[0], url_map[existing_formats[0]])] # Best quality
 +                      elif req_format == 'worst':
 +                              video_url_list = [(existing_formats[len(existing_formats)-1], url_map[existing_formats[len(existing_formats)-1]])] # worst quality
 +                      elif req_format == '-1':
 +                              video_url_list = [(f, url_map[f]) for f in existing_formats] # All formats
 +                      else:
 +                              # Specific format
 +                              if req_format not in url_map:
 +                                      self._downloader.trouble(u'ERROR: requested format not available')
 +                                      return
 +                              video_url_list = [(req_format, url_map[req_format])] # Specific format
 +
 +              results = []
 +              for format_param, video_real_url in video_url_list:
 +                      # Extension
 +                      video_extension = self._video_extensions.get(format_param, 'mp4')
 +
 +                      results.append({
 +                              '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,
 +                      })
 +              return results
 +
 +class BlipTVIE(InfoExtractor):
 +      """Information extractor for blip.tv"""
 +
 +      _VALID_URL = r'^(?:https?://)?(?:\w+\.)?blip\.tv(/.+)$'
 +      _URL_EXT = r'^.*\.([a-z0-9]+)$'
 +      IE_NAME = u'blip.tv'
 +
 +      def report_extraction(self, file_id):
 +              """Report information extraction."""
 +              self._downloader.to_screen(u'[%s] %s: Extracting information' % (self.IE_NAME, file_id))
 +
 +      def report_direct_download(self, title):
 +              """Report information extraction."""
 +              self._downloader.to_screen(u'[%s] %s: Direct download detected' % (self.IE_NAME, title))
 +
 +      def _real_extract(self, url):
 +              mobj = re.match(self._VALID_URL, url)
 +              if mobj is None:
 +                      self._downloader.trouble(u'ERROR: invalid URL: %s' % url)
 +                      return
 +
 +              if '?' in url:
 +                      cchar = '&'
 +              else:
 +                      cchar = '?'
 +              json_url = url + cchar + 'skin=json&version=2&no_wrap=1'
 +              request = urllib2.Request(json_url)
 +              self.report_extraction(mobj.group(1))
 +              info = None
 +              try:
 +                      urlh = urllib2.urlopen(request)
 +                      if urlh.headers.get('Content-Type', '').startswith('video/'): # Direct download
 +                              basename = url.split('/')[-1]
 +                              title,ext = os.path.splitext(basename)
 +                              title = title.decode('UTF-8')
 +                              ext = ext.replace('.', '')
 +                              self.report_direct_download(title)
 +                              info = {
 +                                      'id': title,
 +                                      'url': url,
 +                                      'title': title,
 +                                      'stitle': simplify_title(title),
 +                                      'ext': ext,
 +                                      'urlhandle': urlh
 +                              }
 +              except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                      self._downloader.trouble(u'ERROR: unable to download video info webpage: %s' % str(err))
 +                      return
 +              if info is None: # Regular URL
 +                      try:
 +                              json_code = urlh.read()
 +                      except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                              self._downloader.trouble(u'ERROR: unable to read video info webpage: %s' % str(err))
 +                              return
 +
 +                      try:
 +                              json_data = json.loads(json_code)
 +                              if 'Post' in json_data:
 +                                      data = json_data['Post']
 +                              else:
 +                                      data = json_data
-       
++
 +                              upload_date = datetime.datetime.strptime(data['datestamp'], '%m-%d-%y %H:%M%p').strftime('%Y%m%d')
 +                              video_url = data['media']['url']
 +                              umobj = re.match(self._URL_EXT, video_url)
 +                              if umobj is None:
 +                                      raise ValueError('Can not determine filename extension')
 +                              ext = umobj.group(1)
-       
++
 +                              info = {
 +                                      'id': data['item_id'],
 +                                      'url': video_url,
 +                                      'uploader': data['display_name'],
 +                                      'upload_date': upload_date,
 +                                      'title': data['title'],
 +                                      'stitle': simplify_title(data['title']),
 +                                      'ext': ext,
 +                                      'format': data['media']['mimeType'],
 +                                      'thumbnail': data['thumbnailUrl'],
 +                                      'description': data['description'],
 +                                      'player_url': data['embedUrl']
 +                              }
 +                      except (ValueError,KeyError), err:
 +                              self._downloader.trouble(u'ERROR: unable to parse video information: %s' % repr(err))
 +                              return
 +
 +              return [info]
 +
 +
 +class MyVideoIE(InfoExtractor):
 +      """Information Extractor for myvideo.de."""
 +
 +      _VALID_URL = r'(?:http://)?(?:www\.)?myvideo\.de/watch/([0-9]+)/([^?/]+).*'
 +      IE_NAME = u'myvideo'
 +
 +      def __init__(self, downloader=None):
 +              InfoExtractor.__init__(self, downloader)
 +      
 +      def report_download_webpage(self, video_id):
 +              """Report webpage download."""
 +              self._downloader.to_screen(u'[myvideo] %s: Downloading webpage' % video_id)
 +
 +      def report_extraction(self, video_id):
 +              """Report information extraction."""
 +              self._downloader.to_screen(u'[myvideo] %s: Extracting information' % video_id)
 +
 +      def _real_extract(self,url):
 +              mobj = re.match(self._VALID_URL, url)
 +              if mobj is None:
 +                      self._download.trouble(u'ERROR: invalid URL: %s' % url)
 +                      return
 +
 +              video_id = mobj.group(1)
 +
 +              # Get video webpage
 +              request = urllib2.Request('http://www.myvideo.de/watch/%s' % video_id)
 +              try:
 +                      self.report_download_webpage(video_id)
 +                      webpage = urllib2.urlopen(request).read()
 +              except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                      self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % str(err))
 +                      return
 +
 +              self.report_extraction(video_id)
 +              mobj = re.search(r'<link rel=\'image_src\' href=\'(http://is[0-9].myvideo\.de/de/movie[0-9]+/[a-f0-9]+)/thumbs/[^.]+\.jpg\' />',
 +                               webpage)
 +              if mobj is None:
 +                      self._downloader.trouble(u'ERROR: unable to extract media URL')
 +                      return
 +              video_url = mobj.group(1) + ('/%s.flv' % video_id)
 +
 +              mobj = re.search('<title>([^<]+)</title>', webpage)
 +              if mobj is None:
 +                      self._downloader.trouble(u'ERROR: unable to extract title')
 +                      return
 +
 +              video_title = mobj.group(1)
 +              video_title = sanitize_title(video_title)
 +
 +              simple_title = simplify_title(video_title)
 +
 +              return [{
 +                      'id':           video_id,
 +                      'url':          video_url,
 +                      'uploader':     u'NA',
 +                      'upload_date':  u'NA',
 +                      'title':        video_title,
 +                      'stitle':       simple_title,
 +                      'ext':          u'flv',
 +                      'format':       u'NA',
 +                      'player_url':   None,
 +              }]
 +
 +class ComedyCentralIE(InfoExtractor):
 +      """Information extractor for The Daily Show and Colbert Report """
 +
 +      _VALID_URL = r'^(:(?P<shortname>tds|thedailyshow|cr|colbert|colbertnation|colbertreport))|(https?://)?(www\.)?(?P<showname>thedailyshow|colbertnation)\.com/full-episodes/(?P<episode>.*)$'
 +      IE_NAME = u'comedycentral'
 +
 +      def report_extraction(self, episode_id):
 +              self._downloader.to_screen(u'[comedycentral] %s: Extracting information' % episode_id)
-                               
++
 +      def report_config_download(self, episode_id):
 +              self._downloader.to_screen(u'[comedycentral] %s: Downloading configuration' % episode_id)
 +
 +      def report_index_download(self, episode_id):
 +              self._downloader.to_screen(u'[comedycentral] %s: Downloading show index' % episode_id)
 +
 +      def report_player_url(self, episode_id):
 +              self._downloader.to_screen(u'[comedycentral] %s: Determining player URL' % episode_id)
 +
 +      def _real_extract(self, url):
 +              mobj = re.match(self._VALID_URL, url)
 +              if mobj is None:
 +                      self._downloader.trouble(u'ERROR: invalid URL: %s' % url)
 +                      return
 +
 +              if mobj.group('shortname'):
 +                      if mobj.group('shortname') in ('tds', 'thedailyshow'):
 +                              url = u'http://www.thedailyshow.com/full-episodes/'
 +                      else:
 +                              url = u'http://www.colbertnation.com/full-episodes/'
 +                      mobj = re.match(self._VALID_URL, url)
 +                      assert mobj is not None
 +
 +              dlNewest = not mobj.group('episode')
 +              if dlNewest:
 +                      epTitle = mobj.group('showname')
 +              else:
 +                      epTitle = mobj.group('episode')
 +
 +              req = urllib2.Request(url)
 +              self.report_extraction(epTitle)
 +              try:
 +                      htmlHandle = urllib2.urlopen(req)
 +                      html = htmlHandle.read()
 +              except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                      self._downloader.trouble(u'ERROR: unable to download webpage: %s' % unicode(err))
 +                      return
 +              if dlNewest:
 +                      url = htmlHandle.geturl()
 +                      mobj = re.match(self._VALID_URL, url)
 +                      if mobj is None:
 +                              self._downloader.trouble(u'ERROR: Invalid redirected URL: ' + url)
 +                              return
 +                      if mobj.group('episode') == '':
 +                              self._downloader.trouble(u'ERROR: Redirected URL is still not specific: ' + url)
 +                              return
 +                      epTitle = mobj.group('episode')
 +
 +              mMovieParams = re.findall('(?:<param name="movie" value="|var url = ")(http://media.mtvnservices.com/([^"]*episode.*?:.*?))"', html)
 +              if len(mMovieParams) == 0:
 +                      self._downloader.trouble(u'ERROR: unable to find Flash URL in webpage ' + url)
 +                      return
 +
 +              playerUrl_raw = mMovieParams[0][0]
 +              self.report_player_url(epTitle)
 +              try:
 +                      urlHandle = urllib2.urlopen(playerUrl_raw)
 +                      playerUrl = urlHandle.geturl()
 +              except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                      self._downloader.trouble(u'ERROR: unable to find out player URL: ' + unicode(err))
 +                      return
 +
 +              uri = mMovieParams[0][1]
 +              indexUrl = 'http://shadow.comedycentral.com/feeds/video_player/mrss/?' + urllib.urlencode({'uri': uri})
 +              self.report_index_download(epTitle)
 +              try:
 +                      indexXml = urllib2.urlopen(indexUrl).read()
 +              except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                      self._downloader.trouble(u'ERROR: unable to download episode index: ' + unicode(err))
 +                      return
 +
 +              results = []
 +
 +              idoc = xml.etree.ElementTree.fromstring(indexXml)
 +              itemEls = idoc.findall('.//item')
 +              for itemEl in itemEls:
 +                      mediaId = itemEl.findall('./guid')[0].text
 +                      shortMediaId = mediaId.split(':')[-1]
 +                      showId = mediaId.split(':')[-2].replace('.com', '')
 +                      officialTitle = itemEl.findall('./title')[0].text
 +                      officialDate = itemEl.findall('./pubDate')[0].text
 +
 +                      configUrl = ('http://www.comedycentral.com/global/feeds/entertainment/media/mediaGenEntertainment.jhtml?' +
 +                                              urllib.urlencode({'uri': mediaId}))
 +                      configReq = urllib2.Request(configUrl)
 +                      self.report_config_download(epTitle)
 +                      try:
 +                              configXml = urllib2.urlopen(configReq).read()
 +                      except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                              self._downloader.trouble(u'ERROR: unable to download webpage: %s' % unicode(err))
 +                              return
 +
 +                      cdoc = xml.etree.ElementTree.fromstring(configXml)
 +                      turls = []
 +                      for rendition in cdoc.findall('.//rendition'):
 +                              finfo = (rendition.attrib['bitrate'], rendition.findall('./src')[0].text)
 +                              turls.append(finfo)
 +
 +                      if len(turls) == 0:
 +                              self._downloader.trouble(u'\nERROR: unable to download ' + mediaId + ': No videos found')
 +                              continue
 +
 +                      # For now, just pick the highest bitrate
 +                      format,video_url = turls[-1]
 +
 +                      effTitle = showId + u'-' + epTitle
 +                      info = {
 +                              'id': shortMediaId,
 +                              'url': video_url,
 +                              'uploader': showId,
 +                              'upload_date': officialDate,
 +                              'title': effTitle,
 +                              'stitle': simplify_title(effTitle),
 +                              'ext': 'mp4',
 +                              'format': format,
 +                              'thumbnail': None,
 +                              'description': officialTitle,
 +                              'player_url': playerUrl
 +                      }
 +
 +                      results.append(info)
 +                      
 +              return results
 +
 +
 +class EscapistIE(InfoExtractor):
 +      """Information extractor for The Escapist """
 +
 +      _VALID_URL = r'^(https?://)?(www\.)?escapistmagazine\.com/videos/view/(?P<showname>[^/]+)/(?P<episode>[^/?]+)[/?]?.*$'
 +      IE_NAME = u'escapist'
 +
 +      def report_extraction(self, showName):
 +              self._downloader.to_screen(u'[escapist] %s: Extracting information' % showName)
 +
 +      def report_config_download(self, showName):
 +              self._downloader.to_screen(u'[escapist] %s: Downloading configuration' % showName)
 +
 +      def _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
 +              showName = mobj.group('showname')
 +              videoId = mobj.group('episode')
 +
 +              self.report_extraction(showName)
 +              try:
 +                      webPage = urllib2.urlopen(url).read()
 +              except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                      self._downloader.trouble(u'ERROR: unable to download webpage: ' + unicode(err))
 +                      return
 +
 +              descMatch = re.search('<meta name="description" content="([^"]*)"', webPage)
 +              description = unescapeHTML(descMatch.group(1))
 +              imgMatch = re.search('<meta property="og:image" content="([^"]*)"', webPage)
 +              imgUrl = unescapeHTML(imgMatch.group(1))
 +              playerUrlMatch = re.search('<meta property="og:video" content="([^"]*)"', webPage)
 +              playerUrl = unescapeHTML(playerUrlMatch.group(1))
 +              configUrlMatch = re.search('config=(.*)$', playerUrl)
 +              configUrl = urllib2.unquote(configUrlMatch.group(1))
 +
 +              self.report_config_download(showName)
 +              try:
 +                      configJSON = urllib2.urlopen(configUrl).read()
 +              except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                      self._downloader.trouble(u'ERROR: unable to download configuration: ' + unicode(err))
 +                      return
 +
 +              # Technically, it's JavaScript, not JSON
 +              configJSON = configJSON.replace("'", '"')
 +
 +              try:
 +                      config = json.loads(configJSON)
 +              except (ValueError,), err:
 +                      self._downloader.trouble(u'ERROR: Invalid JSON in configuration file: ' + unicode(err))
 +                      return
 +
 +              playlist = config['playlist']
 +              videoUrl = playlist[1]['url']
 +
 +              info = {
 +                      'id': videoId,
 +                      'url': videoUrl,
 +                      'uploader': showName,
 +                      'upload_date': None,
 +                      'title': showName,
 +                      'stitle': simplify_title(showName),
 +                      'ext': 'flv',
 +                      'format': 'flv',
 +                      'thumbnail': imgUrl,
 +                      'description': description,
 +                      'player_url': playerUrl,
 +              }
 +
 +              return [info]
 +
 +
 +class CollegeHumorIE(InfoExtractor):
 +      """Information extractor for collegehumor.com"""
 +
 +      _VALID_URL = r'^(?:https?://)?(?:www\.)?collegehumor\.com/video/(?P<videoid>[0-9]+)/(?P<shorttitle>.*)$'
 +      IE_NAME = u'collegehumor'
 +
 +      def report_webpage(self, video_id):
 +              """Report information extraction."""
 +              self._downloader.to_screen(u'[%s] %s: Downloading webpage' % (self.IE_NAME, video_id))
 +
 +      def report_extraction(self, video_id):
 +              """Report information extraction."""
 +              self._downloader.to_screen(u'[%s] %s: Extracting information' % (self.IE_NAME, video_id))
 +
 +      def _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('videoid')
 +
 +              self.report_webpage(video_id)
 +              request = urllib2.Request(url)
 +              try:
 +                      webpage = urllib2.urlopen(request).read()
 +              except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                      self._downloader.trouble(u'ERROR: unable to download video webpage: %s' % str(err))
 +                      return
 +
 +              m = re.search(r'id="video:(?P<internalvideoid>[0-9]+)"', webpage)
 +              if m is None:
 +                      self._downloader.trouble(u'ERROR: Cannot extract internal video ID')
 +                      return
 +              internal_video_id = m.group('internalvideoid')
 +
 +              info = {
 +                      'id': video_id,
 +                      'internal_id': internal_video_id,
 +              }
 +
 +              self.report_extraction(video_id)
 +              xmlUrl = 'http://www.collegehumor.com/moogaloop/video:' + internal_video_id
 +              try:
 +                      metaXml = urllib2.urlopen(xmlUrl).read()
 +              except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                      self._downloader.trouble(u'ERROR: unable to download video info XML: %s' % str(err))
 +                      return
 +
 +              mdoc = xml.etree.ElementTree.fromstring(metaXml)
 +              try:
 +                      videoNode = mdoc.findall('./video')[0]
 +                      info['description'] = videoNode.findall('./description')[0].text
 +                      info['title'] = videoNode.findall('./caption')[0].text
 +                      info['stitle'] = simplify_title(info['title'])
 +                      info['url'] = videoNode.findall('./file')[0].text
 +                      info['thumbnail'] = videoNode.findall('./thumbnail')[0].text
 +                      info['ext'] = info['url'].rpartition('.')[2]
 +                      info['format'] = info['ext']
 +              except IndexError:
 +                      self._downloader.trouble(u'\nERROR: Invalid metadata XML file')
 +                      return
 +
 +              return [info]
 +
 +
 +class XVideosIE(InfoExtractor):
 +      """Information extractor for xvideos.com"""
 +
 +      _VALID_URL = r'^(?:https?://)?(?:www\.)?xvideos\.com/video([0-9]+)(?:.*)'
 +      IE_NAME = u'xvideos'
 +
 +      def report_webpage(self, video_id):
 +              """Report information extraction."""
 +              self._downloader.to_screen(u'[%s] %s: Downloading webpage' % (self.IE_NAME, video_id))
 +
 +      def report_extraction(self, video_id):
 +              """Report information extraction."""
 +              self._downloader.to_screen(u'[%s] %s: Extracting information' % (self.IE_NAME, video_id))
 +
 +      def _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(1).decode('utf-8')
 +
 +              self.report_webpage(video_id)
 +
 +              request = urllib2.Request(r'http://www.xvideos.com/video' + video_id)
 +              try:
 +                      webpage = urllib2.urlopen(request).read()
 +              except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                      self._downloader.trouble(u'ERROR: unable to download video webpage: %s' % str(err))
 +                      return
 +
 +              self.report_extraction(video_id)
 +
 +
 +              # Extract video URL
 +              mobj = re.search(r'flv_url=(.+?)&', webpage)
 +              if mobj is None:
 +                      self._downloader.trouble(u'ERROR: unable to extract video url')
 +                      return
 +              video_url = urllib2.unquote(mobj.group(1).decode('utf-8'))
 +
 +
 +              # Extract title
 +              mobj = re.search(r'<title>(.*?)\s+-\s+XVID', webpage)
 +              if mobj is None:
 +                      self._downloader.trouble(u'ERROR: unable to extract video title')
 +                      return
 +              video_title = mobj.group(1).decode('utf-8')
 +
 +
 +              # Extract video thumbnail
 +              mobj = re.search(r'http://(?:img.*?\.)xvideos.com/videos/thumbs/[a-fA-F0-9]/[a-fA-F0-9]/[a-fA-F0-9]/([a-fA-F0-9.]+jpg)', webpage)
 +              if mobj is None:
 +                      self._downloader.trouble(u'ERROR: unable to extract video thumbnail')
 +                      return
 +              video_thumbnail = mobj.group(1).decode('utf-8')
 +
 +              info = {
 +                      'id': video_id,
 +                      'url': video_url,
 +                      'uploader': None,
 +                      'upload_date': None,
 +                      'title': video_title,
 +                      'stitle': simplify_title(video_title),
 +                      'ext': 'flv',
 +                      'format': 'flv',
 +                      'thumbnail': video_thumbnail,
 +                      'description': None,
 +                      'player_url': None,
 +              }
 +
 +              return [info]
 +
 +
 +class SoundcloudIE(InfoExtractor):
 +      """Information extractor for soundcloud.com
 +         To access the media, the uid of the song and a stream token
 +         must be extracted from the page source and the script must make
 +         a request to media.soundcloud.com/crossdomain.xml. Then
 +         the media can be grabbed by requesting from an url composed
 +         of the stream token and uid
 +       """
 +
 +      _VALID_URL = r'^(?:https?://)?(?:www\.)?soundcloud\.com/([\w\d-]+)/([\w\d-]+)'
 +      IE_NAME = u'soundcloud'
 +
 +      def __init__(self, downloader=None):
 +              InfoExtractor.__init__(self, downloader)
 +
 +      def report_webpage(self, video_id):
 +              """Report information extraction."""
 +              self._downloader.to_screen(u'[%s] %s: Downloading webpage' % (self.IE_NAME, video_id))
 +
 +      def report_extraction(self, video_id):
 +              """Report information extraction."""
 +              self._downloader.to_screen(u'[%s] %s: Extracting information' % (self.IE_NAME, video_id))
 +
 +      def _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
 +
 +              # extract uploader (which is in the url)
 +              uploader = mobj.group(1).decode('utf-8')
 +              # extract simple title (uploader + slug of song title)
 +              slug_title =  mobj.group(2).decode('utf-8')
 +              simple_title = uploader + '-' + slug_title
 +
 +              self.report_webpage('%s/%s' % (uploader, slug_title))
 +
 +              request = urllib2.Request('http://soundcloud.com/%s/%s' % (uploader, slug_title))
 +              try:
 +                      webpage = urllib2.urlopen(request).read()
 +              except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                      self._downloader.trouble(u'ERROR: unable to download video webpage: %s' % str(err))
 +                      return
 +
 +              self.report_extraction('%s/%s' % (uploader, slug_title))
 +
 +              # extract uid and stream token that soundcloud hands out for access
 +              mobj = re.search('"uid":"([\w\d]+?)".*?stream_token=([\w\d]+)', webpage)
 +              if mobj:
 +                      video_id = mobj.group(1)
 +                      stream_token = mobj.group(2)
 +
 +              # extract unsimplified title
 +              mobj = re.search('"title":"(.*?)",', webpage)
 +              if mobj:
 +                      title = mobj.group(1)
 +
 +              # construct media url (with uid/token)
 +              mediaURL = "http://media.soundcloud.com/stream/%s?stream_token=%s"
 +              mediaURL = mediaURL % (video_id, stream_token)
 +
 +              # description
 +              description = u'No description available'
 +              mobj = re.search('track-description-value"><p>(.*?)</p>', webpage)
 +              if mobj:
 +                      description = mobj.group(1)
 +              
 +              # upload date
 +              upload_date = None
 +              mobj = re.search("pretty-date'>on ([\w]+ [\d]+, [\d]+ \d+:\d+)</abbr></h2>", webpage)
 +              if mobj:
 +                      try:
 +                              upload_date = datetime.datetime.strptime(mobj.group(1), '%B %d, %Y %H:%M').strftime('%Y%m%d')
 +                      except Exception, e:
 +                              print str(e)
 +
 +              # for soundcloud, a request to a cross domain is required for cookies
 +              request = urllib2.Request('http://media.soundcloud.com/crossdomain.xml', std_headers)
 +
 +              return [{
 +                      'id':           video_id.decode('utf-8'),
 +                      'url':          mediaURL,
 +                      'uploader':     uploader.decode('utf-8'),
 +                      'upload_date':  upload_date,
 +                      'title':        simple_title.decode('utf-8'),
 +                      'stitle':       simple_title.decode('utf-8'),
 +                      'ext':          u'mp3',
 +                      'format':       u'NA',
 +                      'player_url':   None,
 +                      'description': description.decode('utf-8')
 +              }]
 +
 +
 +class InfoQIE(InfoExtractor):
 +      """Information extractor for infoq.com"""
 +
 +      _VALID_URL = r'^(?:https?://)?(?:www\.)?infoq\.com/[^/]+/[^/]+$'
 +      IE_NAME = u'infoq'
 +
 +      def report_webpage(self, video_id):
 +              """Report information extraction."""
 +              self._downloader.to_screen(u'[%s] %s: Downloading webpage' % (self.IE_NAME, video_id))
 +
 +      def report_extraction(self, video_id):
 +              """Report information extraction."""
 +              self._downloader.to_screen(u'[%s] %s: Extracting information' % (self.IE_NAME, video_id))
 +
 +      def _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
 +
 +              self.report_webpage(url)
 +
 +              request = urllib2.Request(url)
 +              try:
 +                      webpage = urllib2.urlopen(request).read()
 +              except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                      self._downloader.trouble(u'ERROR: unable to download video webpage: %s' % str(err))
 +                      return
 +
 +              self.report_extraction(url)
 +
 +
 +              # Extract video URL
 +              mobj = re.search(r"jsclassref='([^']*)'", webpage)
 +              if mobj is None:
 +                      self._downloader.trouble(u'ERROR: unable to extract video url')
 +                      return
 +              video_url = 'rtmpe://video.infoq.com/cfx/st/' + urllib2.unquote(mobj.group(1).decode('base64'))
 +
 +
 +              # Extract title
 +              mobj = re.search(r'contentTitle = "(.*?)";', webpage)
 +              if mobj is None:
 +                      self._downloader.trouble(u'ERROR: unable to extract video title')
 +                      return
 +              video_title = mobj.group(1).decode('utf-8')
 +
 +              # Extract description
 +              video_description = u'No description available.'
 +              mobj = re.search(r'<meta name="description" content="(.*)"(?:\s*/)?>', webpage)
 +              if mobj is not None:
 +                      video_description = mobj.group(1).decode('utf-8')
 +
 +              video_filename = video_url.split('/')[-1]
 +              video_id, extension = video_filename.split('.')
 +
 +              info = {
 +                      'id': video_id,
 +                      'url': video_url,
 +                      'uploader': None,
 +                      'upload_date': None,
 +                      'title': video_title,
 +                      'stitle': simplify_title(video_title),
 +                      'ext': extension,
 +                      'format': extension, # Extension is always(?) mp4, but seems to be flv
 +                      'thumbnail': None,
 +                      'description': video_description,
 +                      'player_url': None,
 +              }
 +
 +              return [info]
 +
 +class MixcloudIE(InfoExtractor):
 +      """Information extractor for www.mixcloud.com"""
 +      _VALID_URL = r'^(?:https?://)?(?:www\.)?mixcloud\.com/([\w\d-]+)/([\w\d-]+)'
 +      IE_NAME = u'mixcloud'
 +
 +      def __init__(self, downloader=None):
 +              InfoExtractor.__init__(self, downloader)
 +
 +      def report_download_json(self, file_id):
 +              """Report JSON download."""
 +              self._downloader.to_screen(u'[%s] Downloading json' % self.IE_NAME)
 +
 +      def report_extraction(self, file_id):
 +              """Report information extraction."""
 +              self._downloader.to_screen(u'[%s] %s: Extracting information' % (self.IE_NAME, file_id))
 +
 +      def get_urls(self, jsonData, fmt, bitrate='best'):
 +              """Get urls from 'audio_formats' section in json"""
 +              file_url = None
 +              try:
 +                      bitrate_list = jsonData[fmt]
 +                      if bitrate is None or bitrate == 'best' or bitrate not in bitrate_list:
 +                              bitrate = max(bitrate_list) # select highest
 +
 +                      url_list = jsonData[fmt][bitrate]
 +              except TypeError: # we have no bitrate info.
 +                      url_list = jsonData[fmt]
-       
 +              return url_list
 +
 +      def check_urls(self, url_list):
 +              """Returns 1st active url from list"""
 +              for url in url_list:
 +                      try:
 +                              urllib2.urlopen(url)
 +                              return url
 +                      except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                              url = None
 +
 +              return None
 +
 +      def _print_formats(self, formats):
 +              print 'Available formats:'
 +              for fmt in formats.keys():
 +                      for b in formats[fmt]:
 +                              try:
 +                                      ext = formats[fmt][b][0]
 +                                      print '%s\t%s\t[%s]' % (fmt, b, ext.split('.')[-1])
 +                              except TypeError: # we have no bitrate info
 +                                      ext = formats[fmt][0]
 +                                      print '%s\t%s\t[%s]' % (fmt, '??', ext.split('.')[-1])
 +                                      break
 +
 +      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
 +              # extract uploader & filename from url
 +              uploader = mobj.group(1).decode('utf-8')
 +              file_id = uploader + "-" + mobj.group(2).decode('utf-8')
 +
 +              # construct API request
 +              file_url = 'http://www.mixcloud.com/api/1/cloudcast/' + '/'.join(url.split('/')[-3:-1]) + '.json'
 +              # retrieve .json file with links to files
 +              request = urllib2.Request(file_url)
 +              try:
 +                      self.report_download_json(file_url)
 +                      jsonData = urllib2.urlopen(request).read()
 +              except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                      self._downloader.trouble(u'ERROR: Unable to retrieve file: %s' % str(err))
 +                      return
 +
 +              # parse JSON
 +              json_data = json.loads(jsonData)
 +              player_url = json_data['player_swf_url']
 +              formats = dict(json_data['audio_formats'])
 +
 +              req_format = self._downloader.params.get('format', None)
 +              bitrate = None
 +
 +              if self._downloader.params.get('listformats', None):
 +                      self._print_formats(formats)
 +                      return
 +
 +              if req_format is None or req_format == 'best':
 +                      for format_param in formats.keys():
 +                              url_list = self.get_urls(formats, format_param)
 +                              # check urls
 +                              file_url = self.check_urls(url_list)
 +                              if file_url is not None:
 +                                      break # got it!
 +              else:
 +                      if req_format not in formats.keys():
 +                              self._downloader.trouble(u'ERROR: format is not available')
 +                              return
 +
 +                      url_list = self.get_urls(formats, req_format)
 +                      file_url = self.check_urls(url_list)
 +                      format_param = req_format
 +
 +              return [{
 +                      'id': file_id.decode('utf-8'),
 +                      'url': file_url.decode('utf-8'),
 +                      'uploader':     uploader.decode('utf-8'),
 +                      'upload_date': u'NA',
 +                      'title': json_data['name'],
 +                      'stitle': simplify_title(json_data['name']),
 +                      'ext': file_url.split('.')[-1].decode('utf-8'),
 +                      'format': (format_param is None and u'NA' or format_param.decode('utf-8')),
 +                      'thumbnail': json_data['thumbnail_url'],
 +                      'description': json_data['description'],
 +                      'player_url': player_url.decode('utf-8'),
 +              }]
 +
 +class StanfordOpenClassroomIE(InfoExtractor):
 +      """Information extractor for Stanford's Open ClassRoom"""
 +
 +      _VALID_URL = r'^(?:https?://)?openclassroom.stanford.edu(?P<path>/?|(/MainFolder/(?:HomePage|CoursePage|VideoPage)\.php([?]course=(?P<course>[^&]+)(&video=(?P<video>[^&]+))?(&.*)?)?))$'
 +      IE_NAME = u'stanfordoc'
 +
 +      def report_download_webpage(self, objid):
 +              """Report information extraction."""
 +              self._downloader.to_screen(u'[%s] %s: Downloading webpage' % (self.IE_NAME, objid))
 +
 +      def report_extraction(self, video_id):
 +              """Report information extraction."""
 +              self._downloader.to_screen(u'[%s] %s: Extracting information' % (self.IE_NAME, video_id))
 +
 +      def _real_extract(self, url):
 +              mobj = re.match(self._VALID_URL, url)
 +              if mobj is None:
 +                      self._downloader.trouble(u'ERROR: invalid URL: %s' % url)
 +                      return
 +
 +              if mobj.group('course') and mobj.group('video'): # A specific video
 +                      course = mobj.group('course')
 +                      video = mobj.group('video')
 +                      info = {
 +                              'id': simplify_title(course + '_' + video),
 +                      }
++
 +                      self.report_extraction(info['id'])
 +                      baseUrl = 'http://openclassroom.stanford.edu/MainFolder/courses/' + course + '/videos/'
 +                      xmlUrl = baseUrl + video + '.xml'
 +                      try:
 +                              metaXml = urllib2.urlopen(xmlUrl).read()
 +                      except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                              self._downloader.trouble(u'ERROR: unable to download video info XML: %s' % unicode(err))
 +                              return
 +                      mdoc = xml.etree.ElementTree.fromstring(metaXml)
 +                      try:
 +                              info['title'] = mdoc.findall('./title')[0].text
 +                              info['url'] = baseUrl + mdoc.findall('./videoFile')[0].text
 +                      except IndexError:
 +                              self._downloader.trouble(u'\nERROR: Invalid metadata XML file')
 +                              return
 +                      info['stitle'] = simplify_title(info['title'])
 +                      info['ext'] = info['url'].rpartition('.')[2]
 +                      info['format'] = info['ext']
 +                      return [info]
 +              elif mobj.group('course'): # A course page
 +                      course = mobj.group('course')
 +                      info = {
 +                              'id': simplify_title(course),
 +                              'type': 'playlist',
 +                      }
 +
 +                      self.report_download_webpage(info['id'])
 +                      try:
 +                              coursepage = urllib2.urlopen(url).read()
 +                      except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                              self._downloader.trouble(u'ERROR: unable to download course info page: ' + unicode(err))
 +                              return
 +
 +                      m = re.search('<h1>([^<]+)</h1>', coursepage)
 +                      if m:
 +                              info['title'] = unescapeHTML(m.group(1))
 +                      else:
 +                              info['title'] = info['id']
 +                      info['stitle'] = simplify_title(info['title'])
 +
 +                      m = re.search('<description>([^<]+)</description>', coursepage)
 +                      if m:
 +                              info['description'] = unescapeHTML(m.group(1))
 +
 +                      links = orderedSet(re.findall('<a href="(VideoPage.php\?[^"]+)">', coursepage))
 +                      info['list'] = [
 +                              {
 +                                      'type': 'reference',
 +                                      'url': 'http://openclassroom.stanford.edu/MainFolder/' + unescapeHTML(vpage),
 +                              }
 +                                      for vpage in links]
 +                      results = []
 +                      for entry in info['list']:
 +                              assert entry['type'] == 'reference'
 +                              results += self.extract(entry['url'])
 +                      return results
 +                      
 +              else: # Root page
 +                      info = {
 +                              'id': 'Stanford OpenClassroom',
 +                              'type': 'playlist',
 +                      }
 +
 +                      self.report_download_webpage(info['id'])
 +                      rootURL = 'http://openclassroom.stanford.edu/MainFolder/HomePage.php'
 +                      try:
 +                              rootpage = urllib2.urlopen(rootURL).read()
 +                      except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                              self._downloader.trouble(u'ERROR: unable to download course info page: ' + unicode(err))
 +                              return
 +
 +                      info['title'] = info['id']
 +                      info['stitle'] = simplify_title(info['title'])
 +
 +                      links = orderedSet(re.findall('<a href="(CoursePage.php\?[^"]+)">', rootpage))
 +                      info['list'] = [
 +                              {
 +                                      'type': 'reference',
 +                                      'url': 'http://openclassroom.stanford.edu/MainFolder/' + unescapeHTML(cpage),
 +                              }
 +                                      for cpage in links]
 +
 +                      results = []
 +                      for entry in info['list']:
 +                              assert entry['type'] == 'reference'
 +                              results += self.extract(entry['url'])
 +                      return results
 +
 +class MTVIE(InfoExtractor):
 +      """Information extractor for MTV.com"""
 +
 +      _VALID_URL = r'^(?P<proto>https?://)?(?:www\.)?mtv\.com/videos/[^/]+/(?P<videoid>[0-9]+)/[^/]+$'
 +      IE_NAME = u'mtv'
 +
 +      def report_webpage(self, video_id):
 +              """Report information extraction."""
 +              self._downloader.to_screen(u'[%s] %s: Downloading webpage' % (self.IE_NAME, video_id))
 +
 +      def report_extraction(self, video_id):
 +              """Report information extraction."""
 +              self._downloader.to_screen(u'[%s] %s: Extracting information' % (self.IE_NAME, video_id))
 +
 +      def _real_extract(self, url):
 +              mobj = re.match(self._VALID_URL, url)
 +              if mobj is None:
 +                      self._downloader.trouble(u'ERROR: invalid URL: %s' % url)
 +                      return
 +              if not mobj.group('proto'):
 +                      url = 'http://' + url
 +              video_id = mobj.group('videoid')
 +              self.report_webpage(video_id)
 +
 +              request = urllib2.Request(url)
 +              try:
 +                      webpage = urllib2.urlopen(request).read()
 +              except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                      self._downloader.trouble(u'ERROR: unable to download video webpage: %s' % str(err))
 +                      return
 +
 +              mobj = re.search(r'<meta name="mtv_vt" content="([^"]+)"/>', webpage)
 +              if mobj is None:
 +                      self._downloader.trouble(u'ERROR: unable to extract song name')
 +                      return
 +              song_name = unescapeHTML(mobj.group(1).decode('iso-8859-1'))
 +              mobj = re.search(r'<meta name="mtv_an" content="([^"]+)"/>', webpage)
 +              if mobj is None:
 +                      self._downloader.trouble(u'ERROR: unable to extract performer')
 +                      return
 +              performer = unescapeHTML(mobj.group(1).decode('iso-8859-1'))
 +              video_title = performer + ' - ' + song_name 
 +
 +              mobj = re.search(r'<meta name="mtvn_uri" content="([^"]+)"/>', webpage)
 +              if mobj is None:
 +                      self._downloader.trouble(u'ERROR: unable to mtvn_uri')
 +                      return
 +              mtvn_uri = mobj.group(1)
 +
 +              mobj = re.search(r'MTVN.Player.defaultPlaylistId = ([0-9]+);', webpage)
 +              if mobj is None:
 +                      self._downloader.trouble(u'ERROR: unable to extract content id')
 +                      return
 +              content_id = mobj.group(1)
 +
 +              videogen_url = 'http://www.mtv.com/player/includes/mediaGen.jhtml?uri=' + mtvn_uri + '&id=' + content_id + '&vid=' + video_id + '&ref=www.mtvn.com&viewUri=' + mtvn_uri
 +              self.report_extraction(video_id)
 +              request = urllib2.Request(videogen_url)
 +              try:
 +                      metadataXml = urllib2.urlopen(request).read()
 +              except (urllib2.URLError, httplib.HTTPException, socket.error), err:
 +                      self._downloader.trouble(u'ERROR: unable to download video metadata: %s' % str(err))
 +                      return
 +
 +              mdoc = xml.etree.ElementTree.fromstring(metadataXml)
 +              renditions = mdoc.findall('.//rendition')
 +
 +              # For now, always pick the highest quality.
 +              rendition = renditions[-1]
 +
 +              try:
 +                      _,_,ext = rendition.attrib['type'].partition('/')
 +                      format = ext + '-' + rendition.attrib['width'] + 'x' + rendition.attrib['height'] + '_' + rendition.attrib['bitrate']
 +                      video_url = rendition.find('./src').text
 +              except KeyError:
 +                      self._downloader.trouble('Invalid rendition field.')
 +                      return
 +
 +              info = {
 +                      'id': video_id,
 +                      'url': video_url,
 +                      'uploader': performer,
 +                      'title': video_title,
 +                      'stitle': simplify_title(video_title),
 +                      'ext': ext,
 +                      'format': format,
 +              }
 +
 +              return [info]