_ Git - youtube-dl/blob - youtube_dl/extractor/youtube.py

   1 # coding: utf-8
   2
   3 import json
   4 import netrc
   5 import re
   6 import socket
   7
   8 from .common import InfoExtractor, SearchInfoExtractor
   9 from ..utils import (
  10     compat_http_client,
  11     compat_parse_qs,
  12     compat_urllib_error,
  13     compat_urllib_parse,
  14     compat_urllib_request,
  15     compat_str,
  16
  17     clean_html,
  18     get_element_by_id,
  19     ExtractorError,
  20     unescapeHTML,
  21     unified_strdate,
  22 )
  23
  24
  25 class YoutubeIE(InfoExtractor):
  26     IE_DESC = u'YouTube.com'
  27     _VALID_URL = r"""^
  28                      (
  29                          (?:https?://)?                                       # http(s):// (optional)
  30                          (?:youtu\.be/|(?:\w+\.)?youtube(?:-nocookie)?\.com/|
  31                             tube\.majestyc\.net/)                             # the various hostnames, with wildcard subdomains
  32                          (?:.*?\#/)?                                          # handle anchor (#/) redirect urls
  33                          (?:                                                  # the various things that can precede the ID:
  34                              (?:(?:v|embed|e)/)                               # v/ or embed/ or e/
  35                              |(?:                                             # or the v= param in all its forms
  36                                  (?:watch|movie(?:_popup)?(?:\.php)?)?              # preceding watch(_popup|.php) or nothing (like /?v=xxxx)
  37                                  (?:\?|\#!?)                                  # the params delimiter ? or # or #!
  38                                  (?:.*?&)?                                    # any other preceding param (like /?s=tuff&v=xxxx)
  39                                  v=
  40                              )
  41                          )?                                                   # optional -> youtube.com/xxxx is OK
  42                      )?                                                       # all until now is optional -> you can pass the naked ID
  43                      ([0-9A-Za-z_-]+)                                         # here is it! the YouTube video ID
  44                      (?(1).+)?                                                # if we found the ID, everything can follow
  45                      $"""
  46     _LANG_URL = r'https://www.youtube.com/?hl=en&persist_hl=1&gl=US&persist_gl=1&opt_out_ackd=1'
  47     _LOGIN_URL = 'https://accounts.google.com/ServiceLogin'
  48     _AGE_URL = 'http://www.youtube.com/verify_age?next_url=/&gl=US&hl=en'
  49     _NEXT_URL_RE = r'[\?&]next_url=([^&]+)'
  50     _NETRC_MACHINE = 'youtube'
  51     # Listed in order of quality
  52     _available_formats = ['38', '37', '46', '22', '45', '35', '44', '34', '18', '43', '6', '5', '17', '13']
  53     _available_formats_prefer_free = ['38', '46', '37', '45', '22', '44', '35', '43', '34', '18', '6', '5', '17', '13']
  54     _video_extensions = {
  55         '13': '3gp',
  56         '17': 'mp4',
  57         '18': 'mp4',
  58         '22': 'mp4',
  59         '37': 'mp4',
  60         '38': 'mp4',
  61         '43': 'webm',
  62         '44': 'webm',
  63         '45': 'webm',
  64         '46': 'webm',
  65     }
  66     _video_dimensions = {
  67         '5': '240x400',
  68         '6': '???',
  69         '13': '???',
  70         '17': '144x176',
  71         '18': '360x640',
  72         '22': '720x1280',
  73         '34': '360x640',
  74         '35': '480x854',
  75         '37': '1080x1920',
  76         '38': '3072x4096',
  77         '43': '360x640',
  78         '44': '480x854',
  79         '45': '720x1280',
  80         '46': '1080x1920',
  81     }
  82     IE_NAME = u'youtube'
  83     _TESTS = [
  84         {
  85             u"url":  u"http://www.youtube.com/watch?v=BaW_jenozKc",
  86             u"file":  u"BaW_jenozKc.mp4",
  87             u"info_dict": {
  88                 u"title": u"youtube-dl test video \"'/\\ä↭𝕐",
  89                 u"uploader": u"Philipp Hagemeister",
  90                 u"uploader_id": u"phihag",
  91                 u"upload_date": u"20121002",
  92                 u"description": u"test chars:  \"'/\\ä↭𝕐\n\nThis is a test video for youtube-dl.\n\nFor more information, contact phihag@phihag.de ."
  93             }
  94         },
  95         {
  96             u"url":  u"http://www.youtube.com/watch?v=1ltcDfZMA3U",
  97             u"file":  u"1ltcDfZMA3U.flv",
  98             u"note": u"Test VEVO video (#897)",
  99             u"info_dict": {
 100                 u"upload_date": u"20070518",
 101                 u"title": u"Maps - It Will Find You",
 102                 u"description": u"Music video by Maps performing It Will Find You.",
 103                 u"uploader": u"MuteUSA",
 104                 u"uploader_id": u"MuteUSA"
 105             }
 106         },
 107         {
 108             u"url":  u"http://www.youtube.com/watch?v=UxxajLWwzqY",
 109             u"file":  u"UxxajLWwzqY.mp4",
 110             u"note": u"Test generic use_cipher_signature video (#897)",
 111             u"info_dict": {
 112                 u"upload_date": u"20120506",
 113                 u"title": u"Icona Pop - I Love It (feat. Charli XCX) [OFFICIAL VIDEO]",
 114                 u"description": u"md5:b085c9804f5ab69f4adea963a2dceb3c",
 115                 u"uploader": u"IconaPop",
 116                 u"uploader_id": u"IconaPop"
 117             }
 118         }
 119     ]
 120
 121
 122     @classmethod
 123     def suitable(cls, url):
 124         """Receives a URL and returns True if suitable for this IE."""
 125         if YoutubePlaylistIE.suitable(url): return False
 126         return re.match(cls._VALID_URL, url, re.VERBOSE) is not None
 127
 128     def report_lang(self):
 129         """Report attempt to set language."""
 130         self.to_screen(u'Setting language')
 131
 132     def report_login(self):
 133         """Report attempt to log in."""
 134         self.to_screen(u'Logging in')
 135
 136     def report_video_webpage_download(self, video_id):
 137         """Report attempt to download video webpage."""
 138         self.to_screen(u'%s: Downloading video webpage' % video_id)
 139
 140     def report_video_info_webpage_download(self, video_id):
 141         """Report attempt to download video info webpage."""
 142         self.to_screen(u'%s: Downloading video info webpage' % video_id)
 143
 144     def report_video_subtitles_download(self, video_id):
 145         """Report attempt to download video info webpage."""
 146         self.to_screen(u'%s: Checking available subtitles' % video_id)
 147
 148     def report_video_subtitles_request(self, video_id, sub_lang, format):
 149         """Report attempt to download video info webpage."""
 150         self.to_screen(u'%s: Downloading video subtitles for %s.%s' % (video_id, sub_lang, format))
 151
 152     def report_video_subtitles_available(self, video_id, sub_lang_list):
 153         """Report available subtitles."""
 154         sub_lang = ",".join(list(sub_lang_list.keys()))
 155         self.to_screen(u'%s: Available subtitles for video: %s' % (video_id, sub_lang))
 156
 157     def report_information_extraction(self, video_id):
 158         """Report attempt to extract video information."""
 159         self.to_screen(u'%s: Extracting video information' % video_id)
 160
 161     def report_unavailable_format(self, video_id, format):
 162         """Report extracted video URL."""
 163         self.to_screen(u'%s: Format %s not available' % (video_id, format))
 164
 165     def report_rtmp_download(self):
 166         """Indicate the download will use the RTMP protocol."""
 167         self.to_screen(u'RTMP download detected')
 168
 169     def _decrypt_signature(self, s):
 170         """Turn the encrypted s field into a working signature"""
 171
 172         if len(s) == 88:
 173             return s[48] + s[81:67:-1] + s[82] + s[66:62:-1] + s[85] + s[61:48:-1] + s[67] + s[47:12:-1] + s[3] + s[11:3:-1] + s[2] + s[12]
 174         elif len(s) == 87:
 175             return s[62] + s[82:62:-1] + s[83] + s[61:52:-1] + s[0] + s[51:2:-1]
 176         elif len(s) == 86:
 177             return s[2:63] + s[82] + s[64:82] + s[63]
 178         elif len(s) == 85:
 179             return s[76] + s[82:76:-1] + s[83] + s[75:60:-1] + s[0] + s[59:50:-1] + s[1] + s[49:2:-1]
 180         elif len(s) == 84:
 181             return s[83:36:-1] + s[2] + s[35:26:-1] + s[3] + s[25:3:-1] + s[26]
 182         elif len(s) == 83:
 183             return s[52] + s[81:55:-1] + s[2] + s[54:52:-1] + s[82] + s[51:36:-1] + s[55] + s[35:2:-1] + s[36]
 184         elif len(s) == 82:
 185             return s[36] + s[79:67:-1] + s[81] + s[66:40:-1] + s[33] + s[39:36:-1] + s[40] + s[35] + s[0] + s[67] + s[32:0:-1] + s[34]
 186
 187         else:
 188             raise ExtractorError(u'Unable to decrypt signature, key length %d not supported; retrying might work' % (len(s)))
 189
 190     def _get_available_subtitles(self, video_id):
 191         self.report_video_subtitles_download(video_id)
 192         request = compat_urllib_request.Request('http://video.google.com/timedtext?hl=en&type=list&v=%s' % video_id)
 193         try:
 194             sub_list = compat_urllib_request.urlopen(request).read().decode('utf-8')
 195         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
 196             return (u'unable to download video subtitles: %s' % compat_str(err), None)
 197         sub_lang_list = re.findall(r'name="([^"]*)"[^>]+lang_code="([\w\-]+)"', sub_list)
 198         sub_lang_list = dict((l[1], l[0]) for l in sub_lang_list)
 199         if not sub_lang_list:
 200             return (u'video doesn\'t have subtitles', None)
 201         return sub_lang_list
 202
 203     def _list_available_subtitles(self, video_id):
 204         sub_lang_list = self._get_available_subtitles(video_id)
 205         self.report_video_subtitles_available(video_id, sub_lang_list)
 206
 207     def _request_subtitle(self, sub_lang, sub_name, video_id, format):
 208         """
 209         Return tuple:
 210         (error_message, sub_lang, sub)
 211         """
 212         self.report_video_subtitles_request(video_id, sub_lang, format)
 213         params = compat_urllib_parse.urlencode({
 214             'lang': sub_lang,
 215             'name': sub_name,
 216             'v': video_id,
 217             'fmt': format,
 218         })
 219         url = 'http://www.youtube.com/api/timedtext?' + params
 220         try:
 221             sub = compat_urllib_request.urlopen(url).read().decode('utf-8')
 222         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
 223             return (u'unable to download video subtitles: %s' % compat_str(err), None, None)
 224         if not sub:
 225             return (u'Did not fetch video subtitles', None, None)
 226         return (None, sub_lang, sub)
 227
 228     def _request_automatic_caption(self, video_id, webpage):
 229         """We need the webpage for getting the captions url, pass it as an
 230            argument to speed up the process."""
 231         sub_lang = self._downloader.params.get('subtitleslang') or 'en'
 232         sub_format = self._downloader.params.get('subtitlesformat')
 233         self.to_screen(u'%s: Looking for automatic captions' % video_id)
 234         mobj = re.search(r';ytplayer.config = ({.*?});', webpage)
 235         err_msg = u'Couldn\'t find automatic captions for "%s"' % sub_lang
 236         if mobj is None:
 237             return [(err_msg, None, None)]
 238         player_config = json.loads(mobj.group(1))
 239         try:
 240             args = player_config[u'args']
 241             caption_url = args[u'ttsurl']
 242             timestamp = args[u'timestamp']
 243             params = compat_urllib_parse.urlencode({
 244                 'lang': 'en',
 245                 'tlang': sub_lang,
 246                 'fmt': sub_format,
 247                 'ts': timestamp,
 248                 'kind': 'asr',
 249             })
 250             subtitles_url = caption_url + '&' + params
 251             sub = self._download_webpage(subtitles_url, video_id, u'Downloading automatic captions')
 252             return [(None, sub_lang, sub)]
 253         except KeyError:
 254             return [(err_msg, None, None)]
 255
 256     def _extract_subtitle(self, video_id):
 257         """
 258         Return a list with a tuple:
 259         [(error_message, sub_lang, sub)]
 260         """
 261         sub_lang_list = self._get_available_subtitles(video_id)
 262         sub_format = self._downloader.params.get('subtitlesformat')
 263         if  isinstance(sub_lang_list,tuple): #There was some error, it didn't get the available subtitles
 264             return [(sub_lang_list[0], None, None)]
 265         if self._downloader.params.get('subtitleslang', False):
 266             sub_lang = self._downloader.params.get('subtitleslang')
 267         elif 'en' in sub_lang_list:
 268             sub_lang = 'en'
 269         else:
 270             sub_lang = list(sub_lang_list.keys())[0]
 271         if not sub_lang in sub_lang_list:
 272             return [(u'no closed captions found in the specified language "%s"' % sub_lang, None, None)]
 273
 274         subtitle = self._request_subtitle(sub_lang, sub_lang_list[sub_lang].encode('utf-8'), video_id, sub_format)
 275         return [subtitle]
 276
 277     def _extract_all_subtitles(self, video_id):
 278         sub_lang_list = self._get_available_subtitles(video_id)
 279         sub_format = self._downloader.params.get('subtitlesformat')
 280         if  isinstance(sub_lang_list,tuple): #There was some error, it didn't get the available subtitles
 281             return [(sub_lang_list[0], None, None)]
 282         subtitles = []
 283         for sub_lang in sub_lang_list:
 284             subtitle = self._request_subtitle(sub_lang, sub_lang_list[sub_lang].encode('utf-8'), video_id, sub_format)
 285             subtitles.append(subtitle)
 286         return subtitles
 287
 288     def _print_formats(self, formats):
 289         print('Available formats:')
 290         for x in formats:
 291             print('%s\t:\t%s\t[%s]' %(x, self._video_extensions.get(x, 'flv'), self._video_dimensions.get(x, '???')))
 292
 293     def _real_initialize(self):
 294         if self._downloader is None:
 295             return
 296
 297         username = None
 298         password = None
 299         downloader_params = self._downloader.params
 300
 301         # Attempt to use provided username and password or .netrc data
 302         if downloader_params.get('username', None) is not None:
 303             username = downloader_params['username']
 304             password = downloader_params['password']
 305         elif downloader_params.get('usenetrc', False):
 306             try:
 307                 info = netrc.netrc().authenticators(self._NETRC_MACHINE)
 308                 if info is not None:
 309                     username = info[0]
 310                     password = info[2]
 311                 else:
 312                     raise netrc.NetrcParseError('No authenticators for %s' % self._NETRC_MACHINE)
 313             except (IOError, netrc.NetrcParseError) as err:
 314                 self._downloader.report_warning(u'parsing .netrc: %s' % compat_str(err))
 315                 return
 316
 317         # Set language
 318         request = compat_urllib_request.Request(self._LANG_URL)
 319         try:
 320             self.report_lang()
 321             compat_urllib_request.urlopen(request).read()
 322         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
 323             self._downloader.report_warning(u'unable to set language: %s' % compat_str(err))
 324             return
 325
 326         # No authentication to be performed
 327         if username is None:
 328             return
 329
 330         request = compat_urllib_request.Request(self._LOGIN_URL)
 331         try:
 332             login_page = compat_urllib_request.urlopen(request).read().decode('utf-8')
 333         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
 334             self._downloader.report_warning(u'unable to fetch login page: %s' % compat_str(err))
 335             return
 336
 337         galx = None
 338         dsh = None
 339         match = re.search(re.compile(r'<input.+?name="GALX".+?value="(.+?)"', re.DOTALL), login_page)
 340         if match:
 341           galx = match.group(1)
 342
 343         match = re.search(re.compile(r'<input.+?name="dsh".+?value="(.+?)"', re.DOTALL), login_page)
 344         if match:
 345           dsh = match.group(1)
 346
 347         # Log in
 348         login_form_strs = {
 349                 u'continue': u'https://www.youtube.com/signin?action_handle_signin=true&feature=sign_in_button&hl=en_US&nomobiletemp=1',
 350                 u'Email': username,
 351                 u'GALX': galx,
 352                 u'Passwd': password,
 353                 u'PersistentCookie': u'yes',
 354                 u'_utf8': u'霱',
 355                 u'bgresponse': u'js_disabled',
 356                 u'checkConnection': u'',
 357                 u'checkedDomains': u'youtube',
 358                 u'dnConn': u'',
 359                 u'dsh': dsh,
 360                 u'pstMsg': u'0',
 361                 u'rmShown': u'1',
 362                 u'secTok': u'',
 363                 u'signIn': u'Sign in',
 364                 u'timeStmp': u'',
 365                 u'service': u'youtube',
 366                 u'uilel': u'3',
 367                 u'hl': u'en_US',
 368         }
 369         # Convert to UTF-8 *before* urlencode because Python 2.x's urlencode
 370         # chokes on unicode
 371         login_form = dict((k.encode('utf-8'), v.encode('utf-8')) for k,v in login_form_strs.items())
 372         login_data = compat_urllib_parse.urlencode(login_form).encode('ascii')
 373         request = compat_urllib_request.Request(self._LOGIN_URL, login_data)
 374         try:
 375             self.report_login()
 376             login_results = compat_urllib_request.urlopen(request).read().decode('utf-8')
 377             if re.search(r'(?i)<form[^>]* id="gaia_loginform"', login_results) is not None:
 378                 self._downloader.report_warning(u'unable to log in: bad username or password')
 379                 return
 380         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
 381             self._downloader.report_warning(u'unable to log in: %s' % compat_str(err))
 382             return
 383
 384         # Confirm age
 385         age_form = {
 386                 'next_url':     '/',
 387                 'action_confirm':   'Confirm',
 388                 }
 389         request = compat_urllib_request.Request(self._AGE_URL, compat_urllib_parse.urlencode(age_form))
 390         try:
 391             self.report_age_confirmation()
 392             compat_urllib_request.urlopen(request).read().decode('utf-8')
 393         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
 394             raise ExtractorError(u'Unable to confirm age: %s' % compat_str(err))
 395
 396     def _extract_id(self, url):
 397         mobj = re.match(self._VALID_URL, url, re.VERBOSE)
 398         if mobj is None:
 399             raise ExtractorError(u'Invalid URL: %s' % url)
 400         video_id = mobj.group(2)
 401         return video_id
 402
 403     def _real_extract(self, url):
 404         if re.match(r'(?:https?://)?[^/]+/watch\?feature=[a-z_]+$', url):
 405             self._downloader.report_warning(u'Did you forget to quote the URL? Remember that & is a meta-character in most shells, so you want to put the URL in quotes, like  youtube-dl \'http://www.youtube.com/watch?feature=foo&v=BaW_jenozKc\' (or simply  youtube-dl BaW_jenozKc  ).')
 406
 407         # Extract original video URL from URL with redirection, like age verification, using next_url parameter
 408         mobj = re.search(self._NEXT_URL_RE, url)
 409         if mobj:
 410             url = 'https://www.youtube.com/' + compat_urllib_parse.unquote(mobj.group(1)).lstrip('/')
 411         video_id = self._extract_id(url)
 412
 413         # Get video webpage
 414         self.report_video_webpage_download(video_id)
 415         url = 'https://www.youtube.com/watch?v=%s&gl=US&hl=en&has_verified=1' % video_id
 416         request = compat_urllib_request.Request(url)
 417         try:
 418             video_webpage_bytes = compat_urllib_request.urlopen(request).read()
 419         except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
 420             raise ExtractorError(u'Unable to download video webpage: %s' % compat_str(err))
 421
 422         video_webpage = video_webpage_bytes.decode('utf-8', 'ignore')
 423
 424         # Attempt to extract SWF player URL
 425         mobj = re.search(r'swfConfig.*?"(http:\\/\\/.*?watch.*?-.*?\.swf)"', video_webpage)
 426         if mobj is not None:
 427             player_url = re.sub(r'\\(.)', r'\1', mobj.group(1))
 428         else:
 429             player_url = None
 430
 431         # Get video info
 432         self.report_video_info_webpage_download(video_id)
 433         for el_type in ['&el=embedded', '&el=detailpage', '&el=vevo', '']:
 434             video_info_url = ('https://www.youtube.com/get_video_info?&video_id=%s%s&ps=default&eurl=&gl=US&hl=en'
 435                     % (video_id, el_type))
 436             video_info_webpage = self._download_webpage(video_info_url, video_id,
 437                                     note=False,
 438                                     errnote='unable to download video info webpage')
 439             video_info = compat_parse_qs(video_info_webpage)
 440             if 'token' in video_info:
 441                 break
 442         if 'token' not in video_info:
 443             if 'reason' in video_info:
 444                 raise ExtractorError(u'YouTube said: %s' % video_info['reason'][0])
 445             else:
 446                 raise ExtractorError(u'"token" parameter not in video info for unknown reason')
 447
 448         # Check for "rental" videos
 449         if 'ypc_video_rental_bar_text' in video_info and 'author' not in video_info:
 450             raise ExtractorError(u'"rental" videos not supported')
 451
 452         # Start extracting information
 453         self.report_information_extraction(video_id)
 454
 455         # uploader
 456         if 'author' not in video_info:
 457             raise ExtractorError(u'Unable to extract uploader name')
 458         video_uploader = compat_urllib_parse.unquote_plus(video_info['author'][0])
 459
 460         # uploader_id
 461         video_uploader_id = None
 462         mobj = re.search(r'<link itemprop="url" href="http://www.youtube.com/(?:user|channel)/([^"]+)">', video_webpage)
 463         if mobj is not None:
 464             video_uploader_id = mobj.group(1)
 465         else:
 466             self._downloader.report_warning(u'unable to extract uploader nickname')
 467
 468         # title
 469         if 'title' not in video_info:
 470             raise ExtractorError(u'Unable to extract video title')
 471         video_title = compat_urllib_parse.unquote_plus(video_info['title'][0])
 472
 473         # thumbnail image
 474         if 'thumbnail_url' not in video_info:
 475             self._downloader.report_warning(u'unable to extract video thumbnail')
 476             video_thumbnail = ''
 477         else:   # don't panic if we can't find it
 478             video_thumbnail = compat_urllib_parse.unquote_plus(video_info['thumbnail_url'][0])
 479
 480         # upload date
 481         upload_date = None
 482         mobj = re.search(r'id="eow-date.*?>(.*?)</span>', video_webpage, re.DOTALL)
 483         if mobj is not None:
 484             upload_date = ' '.join(re.sub(r'[/,-]', r' ', mobj.group(1)).split())
 485             upload_date = unified_strdate(upload_date)
 486
 487         # description
 488         video_description = get_element_by_id("eow-description", video_webpage)
 489         if video_description:
 490             video_description = clean_html(video_description)
 491         else:
 492             fd_mobj = re.search(r'<meta name="description" content="([^"]+)"', video_webpage)
 493             if fd_mobj:
 494                 video_description = unescapeHTML(fd_mobj.group(1))
 495             else:
 496                 video_description = u''
 497
 498         # subtitles
 499         video_subtitles = None
 500
 501         if self._downloader.params.get('writesubtitles', False):
 502             video_subtitles = self._extract_subtitle(video_id)
 503             if video_subtitles:
 504                 (sub_error, sub_lang, sub) = video_subtitles[0]
 505                 if sub_error:
 506                     self._downloader.report_warning(sub_error)
 507
 508         if self._downloader.params.get('writeautomaticsub', False):
 509             video_subtitles = self._request_automatic_caption(video_id, video_webpage)
 510             (sub_error, sub_lang, sub) = video_subtitles[0]
 511             if sub_error:
 512                 self._downloader.report_warning(sub_error)
 513
 514         if self._downloader.params.get('allsubtitles', False):
 515             video_subtitles = self._extract_all_subtitles(video_id)
 516             for video_subtitle in video_subtitles:
 517                 (sub_error, sub_lang, sub) = video_subtitle
 518                 if sub_error:
 519                     self._downloader.report_warning(sub_error)
 520
 521         if self._downloader.params.get('listsubtitles', False):
 522             self._list_available_subtitles(video_id)
 523             return
 524
 525         if 'length_seconds' not in video_info:
 526             self._downloader.report_warning(u'unable to extract video duration')
 527             video_duration = ''
 528         else:
 529             video_duration = compat_urllib_parse.unquote_plus(video_info['length_seconds'][0])
 530
 531         # Decide which formats to download
 532         req_format = self._downloader.params.get('format', None)
 533
 534         try:
 535             mobj = re.search(r';ytplayer.config = ({.*?});', video_webpage)
 536             if not mobj:
 537                 raise ValueError('Could not find vevo ID')
 538             info = json.loads(mobj.group(1))
 539             args = info['args']
 540             # Easy way to know if the 's' value is in url_encoded_fmt_stream_map
 541             # this signatures are encrypted
 542             m_s = re.search(r'[&,]s=', args['url_encoded_fmt_stream_map'])
 543             if m_s is not None:
 544                 self.to_screen(u'%s: Encrypted signatures detected.' % video_id)
 545                 video_info['url_encoded_fmt_stream_map'] = [args['url_encoded_fmt_stream_map']]
 546         except ValueError:
 547             pass
 548
 549         if 'conn' in video_info and video_info['conn'][0].startswith('rtmp'):
 550             self.report_rtmp_download()
 551             video_url_list = [(None, video_info['conn'][0])]
 552         elif 'url_encoded_fmt_stream_map' in video_info and len(video_info['url_encoded_fmt_stream_map']) >= 1:
 553             url_map = {}
 554             for url_data_str in video_info['url_encoded_fmt_stream_map'][0].split(','):
 555                 url_data = compat_parse_qs(url_data_str)
 556                 if 'itag' in url_data and 'url' in url_data:
 557                     url = url_data['url'][0]
 558                     if 'sig' in url_data:
 559                         url += '&signature=' + url_data['sig'][0]
 560                     elif 's' in url_data:
 561                         if self._downloader.params.get('verbose'):
 562                             s = url_data['s'][0]
 563                             player = self._search_regex(r'html5player-(.+?)\.js', video_webpage,
 564                                 'html5 player', fatal=False)
 565                             self.to_screen('encrypted signature length %d (%d.%d), itag %s, html5 player %s' %
 566                                 (len(s), len(s.split('.')[0]), len(s.split('.')[1]), url_data['itag'][0], player))
 567                         signature = self._decrypt_signature(url_data['s'][0])
 568                         url += '&signature=' + signature
 569                     if 'ratebypass' not in url:
 570                         url += '&ratebypass=yes'
 571                     url_map[url_data['itag'][0]] = url
 572
 573             format_limit = self._downloader.params.get('format_limit', None)
 574             available_formats = self._available_formats_prefer_free if self._downloader.params.get('prefer_free_formats', False) else self._available_formats
 575             if format_limit is not None and format_limit in available_formats:
 576                 format_list = available_formats[available_formats.index(format_limit):]
 577             else:
 578                 format_list = available_formats
 579             existing_formats = [x for x in format_list if x in url_map]
 580             if len(existing_formats) == 0:
 581                 raise ExtractorError(u'no known formats available for video')
 582             if self._downloader.params.get('listformats', None):
 583                 self._print_formats(existing_formats)
 584                 return
 585             if req_format is None or req_format == 'best':
 586                 video_url_list = [(existing_formats[0], url_map[existing_formats[0]])] # Best quality
 587             elif req_format == 'worst':
 588                 video_url_list = [(existing_formats[-1], url_map[existing_formats[-1]])] # worst quality
 589             elif req_format in ('-1', 'all'):
 590                 video_url_list = [(f, url_map[f]) for f in existing_formats] # All formats
 591             else:
 592                 # Specific formats. We pick the first in a slash-delimeted sequence.
 593                 # For example, if '1/2/3/4' is requested and '2' and '4' are available, we pick '2'.
 594                 req_formats = req_format.split('/')
 595                 video_url_list = None
 596                 for rf in req_formats:
 597                     if rf in url_map:
 598                         video_url_list = [(rf, url_map[rf])]
 599                         break
 600                 if video_url_list is None:
 601                     raise ExtractorError(u'requested format not available')
 602         else:
 603             raise ExtractorError(u'no conn or url_encoded_fmt_stream_map information found in video info')
 604
 605         results = []
 606         for format_param, video_real_url in video_url_list:
 607             # Extension
 608             video_extension = self._video_extensions.get(format_param, 'flv')
 609
 610             video_format = '{0} - {1}'.format(format_param if format_param else video_extension,
 611                                               self._video_dimensions.get(format_param, '???'))
 612
 613             results.append({
 614                 'id':       video_id,
 615                 'url':      video_real_url,
 616                 'uploader': video_uploader,
 617                 'uploader_id': video_uploader_id,
 618                 'upload_date':  upload_date,
 619                 'title':    video_title,
 620                 'ext':      video_extension,
 621                 'format':   video_format,
 622                 'thumbnail':    video_thumbnail,
 623                 'description':  video_description,
 624                 'player_url':   player_url,
 625                 'subtitles':    video_subtitles,
 626                 'duration':     video_duration
 627             })
 628         return results
 629
 630 class YoutubePlaylistIE(InfoExtractor):
 631     IE_DESC = u'YouTube.com playlists'
 632     _VALID_URL = r"""(?:
 633                         (?:https?://)?
 634                         (?:\w+\.)?
 635                         youtube\.com/
 636                         (?:
 637                            (?:course|view_play_list|my_playlists|artist|playlist|watch)
 638                            \? (?:.*?&)*? (?:p|a|list)=
 639                         |  p/
 640                         )
 641                         ((?:PL|EC|UU)?[0-9A-Za-z-_]{10,})
 642                         .*
 643                      |
 644                         ((?:PL|EC|UU)[0-9A-Za-z-_]{10,})
 645                      )"""
 646     _TEMPLATE_URL = 'https://gdata.youtube.com/feeds/api/playlists/%s?max-results=%i&start-index=%i&v=2&alt=json&safeSearch=none'
 647     _MAX_RESULTS = 50
 648     IE_NAME = u'youtube:playlist'
 649
 650     @classmethod
 651     def suitable(cls, url):
 652         """Receives a URL and returns True if suitable for this IE."""
 653         return re.match(cls._VALID_URL, url, re.VERBOSE) is not None
 654
 655     def _real_extract(self, url):
 656         # Extract playlist id
 657         mobj = re.match(self._VALID_URL, url, re.VERBOSE)
 658         if mobj is None:
 659             raise ExtractorError(u'Invalid URL: %s' % url)
 660
 661         # Download playlist videos from API
 662         playlist_id = mobj.group(1) or mobj.group(2)
 663         page_num = 1
 664         videos = []
 665
 666         while True:
 667             url = self._TEMPLATE_URL % (playlist_id, self._MAX_RESULTS, self._MAX_RESULTS * (page_num - 1) + 1)
 668             page = self._download_webpage(url, playlist_id, u'Downloading page #%s' % page_num)
 669
 670             try:
 671                 response = json.loads(page)
 672             except ValueError as err:
 673                 raise ExtractorError(u'Invalid JSON in API response: ' + compat_str(err))
 674
 675             if 'feed' not in response:
 676                 raise ExtractorError(u'Got a malformed response from YouTube API')
 677             playlist_title = response['feed']['title']['$t']
 678             if 'entry' not in response['feed']:
 679                 # Number of videos is a multiple of self._MAX_RESULTS
 680                 break
 681
 682             for entry in response['feed']['entry']:
 683                 index = entry['yt$position']['$t']
 684                 if 'media$group' in entry and 'media$player' in entry['media$group']:
 685                     videos.append((index, entry['media$group']['media$player']['url']))
 686
 687             if len(response['feed']['entry']) < self._MAX_RESULTS:
 688                 break
 689             page_num += 1
 690
 691         videos = [v[1] for v in sorted(videos)]
 692
 693         url_results = [self.url_result(url, 'Youtube') for url in videos]
 694         return [self.playlist_result(url_results, playlist_id, playlist_title)]
 695
 696
 697 class YoutubeChannelIE(InfoExtractor):
 698     IE_DESC = u'YouTube.com channels'
 699     _VALID_URL = r"^(?:https?://)?(?:youtu\.be|(?:\w+\.)?youtube(?:-nocookie)?\.com)/channel/([0-9A-Za-z_-]+)"
 700     _TEMPLATE_URL = 'http://www.youtube.com/channel/%s/videos?sort=da&flow=list&view=0&page=%s&gl=US&hl=en'
 701     _MORE_PAGES_INDICATOR = 'yt-uix-load-more'
 702     _MORE_PAGES_URL = 'http://www.youtube.com/channel_ajax?action_load_more_videos=1&flow=list&paging=%s&view=0&sort=da&channel_id=%s'
 703     IE_NAME = u'youtube:channel'
 704
 705     def extract_videos_from_page(self, page):
 706         ids_in_page = []
 707         for mobj in re.finditer(r'href="/watch\?v=([0-9A-Za-z_-]+)&?', page):
 708             if mobj.group(1) not in ids_in_page:
 709                 ids_in_page.append(mobj.group(1))
 710         return ids_in_page
 711
 712     def _real_extract(self, url):
 713         # Extract channel id
 714         mobj = re.match(self._VALID_URL, url)
 715         if mobj is None:
 716             raise ExtractorError(u'Invalid URL: %s' % url)
 717
 718         # Download channel page
 719         channel_id = mobj.group(1)
 720         video_ids = []
 721         pagenum = 1
 722
 723         url = self._TEMPLATE_URL % (channel_id, pagenum)
 724         page = self._download_webpage(url, channel_id,
 725                                       u'Downloading page #%s' % pagenum)
 726
 727         # Extract video identifiers
 728         ids_in_page = self.extract_videos_from_page(page)
 729         video_ids.extend(ids_in_page)
 730
 731         # Download any subsequent channel pages using the json-based channel_ajax query
 732         if self._MORE_PAGES_INDICATOR in page:
 733             while True:
 734                 pagenum = pagenum + 1
 735
 736                 url = self._MORE_PAGES_URL % (pagenum, channel_id)
 737                 page = self._download_webpage(url, channel_id,
 738                                               u'Downloading page #%s' % pagenum)
 739
 740                 page = json.loads(page)
 741
 742                 ids_in_page = self.extract_videos_from_page(page['content_html'])
 743                 video_ids.extend(ids_in_page)
 744
 745                 if self._MORE_PAGES_INDICATOR  not in page['load_more_widget_html']:
 746                     break
 747
 748         self._downloader.to_screen(u'[youtube] Channel %s: Found %i videos' % (channel_id, len(video_ids)))
 749
 750         urls = ['http://www.youtube.com/watch?v=%s' % id for id in video_ids]
 751         url_entries = [self.url_result(url, 'Youtube') for url in urls]
 752         return [self.playlist_result(url_entries, channel_id)]
 753
 754
 755 class YoutubeUserIE(InfoExtractor):
 756     IE_DESC = u'YouTube.com user videos (URL or "ytuser" keyword)'
 757     _VALID_URL = r'(?:(?:(?:https?://)?(?:\w+\.)?youtube\.com/user/)|ytuser:)([A-Za-z0-9_-]+)'
 758     _TEMPLATE_URL = 'http://gdata.youtube.com/feeds/api/users/%s'
 759     _GDATA_PAGE_SIZE = 50
 760     _GDATA_URL = 'http://gdata.youtube.com/feeds/api/users/%s/uploads?max-results=%d&start-index=%d'
 761     _VIDEO_INDICATOR = r'/watch\?v=(.+?)[\<&]'
 762     IE_NAME = u'youtube:user'
 763
 764     def _real_extract(self, url):
 765         # Extract username
 766         mobj = re.match(self._VALID_URL, url)
 767         if mobj is None:
 768             raise ExtractorError(u'Invalid URL: %s' % url)
 769
 770         username = mobj.group(1)
 771
 772         # Download video ids using YouTube Data API. Result size per
 773         # query is limited (currently to 50 videos) so we need to query
 774         # page by page until there are no video ids - it means we got
 775         # all of them.
 776
 777         video_ids = []
 778         pagenum = 0
 779
 780         while True:
 781             start_index = pagenum * self._GDATA_PAGE_SIZE + 1
 782
 783             gdata_url = self._GDATA_URL % (username, self._GDATA_PAGE_SIZE, start_index)
 784             page = self._download_webpage(gdata_url, username,
 785                                           u'Downloading video ids from %d to %d' % (start_index, start_index + self._GDATA_PAGE_SIZE))
 786
 787             # Extract video identifiers
 788             ids_in_page = []
 789
 790             for mobj in re.finditer(self._VIDEO_INDICATOR, page):
 791                 if mobj.group(1) not in ids_in_page:
 792                     ids_in_page.append(mobj.group(1))
 793
 794             video_ids.extend(ids_in_page)
 795
 796             # A little optimization - if current page is not
 797             # "full", ie. does not contain PAGE_SIZE video ids then
 798             # we can assume that this page is the last one - there
 799             # are no more ids on further pages - no need to query
 800             # again.
 801
 802             if len(ids_in_page) < self._GDATA_PAGE_SIZE:
 803                 break
 804
 805             pagenum += 1
 806
 807         urls = ['http://www.youtube.com/watch?v=%s' % video_id for video_id in video_ids]
 808         url_results = [self.url_result(url, 'Youtube') for url in urls]
 809         return [self.playlist_result(url_results, playlist_title = username)]
 810
 811 class YoutubeSearchIE(SearchInfoExtractor):
 812     IE_DESC = u'YouTube.com searches'
 813     _API_URL = 'https://gdata.youtube.com/feeds/api/videos?q=%s&start-index=%i&max-results=50&v=2&alt=jsonc'
 814     _MAX_RESULTS = 1000
 815     IE_NAME = u'youtube:search'
 816     _SEARCH_KEY = 'ytsearch'
 817
 818     def report_download_page(self, query, pagenum):
 819         """Report attempt to download search page with given number."""
 820         self._downloader.to_screen(u'[youtube] query "%s": Downloading page %s' % (query, pagenum))
 821
 822     def _get_n_results(self, query, n):
 823         """Get a specified number of results for a query"""
 824
 825         video_ids = []
 826         pagenum = 0
 827         limit = n
 828
 829         while (50 * pagenum) < limit:
 830             self.report_download_page(query, pagenum+1)
 831             result_url = self._API_URL % (compat_urllib_parse.quote_plus(query), (50*pagenum)+1)
 832             request = compat_urllib_request.Request(result_url)
 833             try:
 834                 data = compat_urllib_request.urlopen(request).read().decode('utf-8')
 835             except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
 836                 raise ExtractorError(u'Unable to download API page: %s' % compat_str(err))
 837             api_response = json.loads(data)['data']
 838
 839             if not 'items' in api_response:
 840                 raise ExtractorError(u'[youtube] No video results')
 841
 842             new_ids = list(video['id'] for video in api_response['items'])
 843             video_ids += new_ids
 844
 845             limit = min(n, api_response['totalItems'])
 846             pagenum += 1
 847
 848         if len(video_ids) > n:
 849             video_ids = video_ids[:n]
 850         videos = [self.url_result('http://www.youtube.com/watch?v=%s' % id, 'Youtube') for id in video_ids]
 851         return self.playlist_result(videos, query)
 852
 853
 854 class YoutubeShowIE(InfoExtractor):
 855     IE_DESC = u'YouTube.com (multi-season) shows'
 856     _VALID_URL = r'https?://www\.youtube\.com/show/(.*)'
 857     IE_NAME = u'youtube:show'
 858
 859     def _real_extract(self, url):
 860         mobj = re.match(self._VALID_URL, url)
 861         show_name = mobj.group(1)
 862         webpage = self._download_webpage(url, show_name, u'Downloading show webpage')
 863         # There's one playlist for each season of the show
 864         m_seasons = list(re.finditer(r'href="(/playlist\?list=.*?)"', webpage))
 865         self.to_screen(u'%s: Found %s seasons' % (show_name, len(m_seasons)))
 866         return [self.url_result('https://www.youtube.com' + season.group(1), 'YoutubePlaylist') for season in m_seasons]