youtube_dl/extractor/ted.py

   1 from __future__ import unicode_literals
   2
   3 import json
   4 import re
   5
   6 from .common import InfoExtractor
   7
   8 from ..compat import compat_str
   9 from ..utils import (
  10     int_or_none,
  11     try_get,
  12 )
  13
  14
  15 class TEDIE(InfoExtractor):
  16     IE_NAME = 'ted'
  17     _VALID_URL = r'''(?x)
  18         (?P<proto>https?://)
  19         (?P<type>www|embed(?:-ssl)?)(?P<urlmain>\.ted\.com/
  20         (
  21             (?P<type_playlist>playlists(?:/\d+)?) # We have a playlist
  22             |
  23             ((?P<type_talk>talks)) # We have a simple talk
  24             |
  25             (?P<type_watch>watch)/[^/]+/[^/]+
  26         )
  27         (/lang/(.*?))? # The url may contain the language
  28         /(?P<name>[\w-]+) # Here goes the name and then ".html"
  29         .*)$
  30         '''
  31     _TESTS = [{
  32         'url': 'http://www.ted.com/talks/dan_dennett_on_our_consciousness.html',
  33         'md5': '0de43ac406aa3e4ea74b66c9c7789b13',
  34         'info_dict': {
  35             'id': '102',
  36             'ext': 'mp4',
  37             'title': 'The illusion of consciousness',
  38             'description': ('Philosopher Dan Dennett makes a compelling '
  39                             'argument that not only don\'t we understand our own '
  40                             'consciousness, but that half the time our brains are '
  41                             'actively fooling us.'),
  42             'uploader': 'Dan Dennett',
  43             'width': 853,
  44             'duration': 1308,
  45         }
  46     }, {
  47         'url': 'http://www.ted.com/watch/ted-institute/ted-bcg/vishal-sikka-the-beauty-and-power-of-algorithms',
  48         'md5': 'b899ac15e345fb39534d913f7606082b',
  49         'info_dict': {
  50             'id': 'tSVI8ta_P4w',
  51             'ext': 'mp4',
  52             'title': 'Vishal Sikka: The beauty and power of algorithms',
  53             'thumbnail': r're:^https?://.+\.jpg',
  54             'description': 'md5:6261fdfe3e02f4f579cbbfc00aff73f4',
  55             'upload_date': '20140122',
  56             'uploader_id': 'TEDInstitute',
  57             'uploader': 'TED Institute',
  58         },
  59         'add_ie': ['Youtube'],
  60     }, {
  61         'url': 'http://www.ted.com/talks/gabby_giffords_and_mark_kelly_be_passionate_be_courageous_be_your_best',
  62         'md5': '71b3ab2f4233012dce09d515c9c39ce2',
  63         'info_dict': {
  64             'id': '1972',
  65             'ext': 'mp4',
  66             'title': 'Be passionate. Be courageous. Be your best.',
  67             'uploader': 'Gabby Giffords and Mark Kelly',
  68             'description': 'md5:5174aed4d0f16021b704120360f72b92',
  69             'duration': 1128,
  70         },
  71     }, {
  72         'url': 'http://www.ted.com/playlists/who_are_the_hackers',
  73         'info_dict': {
  74             'id': '10',
  75             'title': 'Who are the hackers?',
  76         },
  77         'playlist_mincount': 6,
  78     }, {
  79         # contains a youtube video
  80         'url': 'https://www.ted.com/talks/douglas_adams_parrots_the_universe_and_everything',
  81         'add_ie': ['Youtube'],
  82         'info_dict': {
  83             'id': '_ZG8HBuDjgc',
  84             'ext': 'webm',
  85             'title': 'Douglas Adams: Parrots the Universe and Everything',
  86             'description': 'md5:01ad1e199c49ac640cb1196c0e9016af',
  87             'uploader': 'University of California Television (UCTV)',
  88             'uploader_id': 'UCtelevision',
  89             'upload_date': '20080522',
  90         },
  91         'params': {
  92             'skip_download': True,
  93         },
  94     }, {
  95         # YouTube video
  96         'url': 'http://www.ted.com/talks/jeffrey_kluger_the_sibling_bond',
  97         'add_ie': ['Youtube'],
  98         'info_dict': {
  99             'id': 'aFBIPO-P7LM',
 100             'ext': 'mp4',
 101             'title': 'The hidden power of siblings: Jeff Kluger at TEDxAsheville',
 102             'description': 'md5:3d7a4f50d95ca5dd67104e2a20f43fe1',
 103             'uploader': 'TEDx Talks',
 104             'uploader_id': 'TEDxTalks',
 105             'upload_date': '20111216',
 106         },
 107         'params': {
 108             'skip_download': True,
 109         },
 110     }, {
 111         # no nativeDownloads
 112         'url': 'https://www.ted.com/talks/tom_thum_the_orchestra_in_my_mouth',
 113         'info_dict': {
 114             'id': '1792',
 115             'ext': 'mp4',
 116             'title': 'The orchestra in my mouth',
 117             'description': 'md5:5d1d78650e2f8dfcbb8ebee2951ac29a',
 118             'uploader': 'Tom Thum',
 119         },
 120         'params': {
 121             'skip_download': True,
 122         },
 123     }]
 124
 125     _NATIVE_FORMATS = {
 126         'low': {'width': 320, 'height': 180},
 127         'medium': {'width': 512, 'height': 288},
 128         'high': {'width': 854, 'height': 480},
 129     }
 130
 131     def _extract_info(self, webpage):
 132         info_json = self._search_regex(
 133             r'(?s)q\(\s*"\w+.init"\s*,\s*({.+})\)\s*</script>',
 134             webpage, 'info json')
 135         return json.loads(info_json)
 136
 137     def _real_extract(self, url):
 138         m = re.match(self._VALID_URL, url, re.VERBOSE)
 139         if m.group('type').startswith('embed'):
 140             desktop_url = m.group('proto') + 'www' + m.group('urlmain')
 141             return self.url_result(desktop_url, 'TED')
 142         name = m.group('name')
 143         if m.group('type_talk'):
 144             return self._talk_info(url, name)
 145         elif m.group('type_watch'):
 146             return self._watch_info(url, name)
 147         else:
 148             return self._playlist_videos_info(url, name)
 149
 150     def _playlist_videos_info(self, url, name):
 151         '''Returns the videos of the playlist'''
 152
 153         webpage = self._download_webpage(url, name,
 154                                          'Downloading playlist webpage')
 155         info = self._extract_info(webpage)
 156
 157         playlist_info = try_get(
 158             info, lambda x: x['__INITIAL_DATA__']['playlist'],
 159             dict) or info['playlist']
 160
 161         playlist_entries = [
 162             self.url_result('http://www.ted.com/talks/' + talk['slug'], self.ie_key())
 163             for talk in try_get(
 164                 info, lambda x: x['__INITIAL_DATA__']['talks'],
 165                 dict) or info['talks']
 166         ]
 167         return self.playlist_result(
 168             playlist_entries,
 169             playlist_id=compat_str(playlist_info['id']),
 170             playlist_title=playlist_info['title'])
 171
 172     def _talk_info(self, url, video_name):
 173         webpage = self._download_webpage(url, video_name)
 174
 175         info = self._extract_info(webpage)
 176
 177         talk_info = try_get(
 178             info, lambda x: x['__INITIAL_DATA__']['talks'][0],
 179             dict) or info['talks'][0]
 180
 181         title = talk_info['title'].strip()
 182
 183         external = talk_info.get('external')
 184         if external:
 185             service = external['service']
 186             self.to_screen('Found video from %s' % service)
 187             ext_url = None
 188             if service.lower() == 'youtube':
 189                 ext_url = external.get('code')
 190             return {
 191                 '_type': 'url',
 192                 'url': ext_url or external['uri'],
 193             }
 194
 195         native_downloads = try_get(
 196             talk_info,
 197             (lambda x: x['downloads']['nativeDownloads'],
 198              lambda x: x['nativeDownloads']),
 199             dict) or {}
 200
 201         formats = [{
 202             'url': format_url,
 203             'format_id': format_id,
 204             'format': format_id,
 205         } for (format_id, format_url) in native_downloads.items() if format_url is not None]
 206         if formats:
 207             for f in formats:
 208                 finfo = self._NATIVE_FORMATS.get(f['format_id'])
 209                 if finfo:
 210                     f.update(finfo)
 211
 212         player_talk = talk_info['player_talks'][0]
 213
 214         resources_ = player_talk.get('resources') or talk_info.get('resources')
 215
 216         http_url = None
 217         for format_id, resources in resources_.items():
 218             if format_id == 'h264':
 219                 for resource in resources:
 220                     h264_url = resource.get('file')
 221                     if not h264_url:
 222                         continue
 223                     bitrate = int_or_none(resource.get('bitrate'))
 224                     formats.append({
 225                         'url': h264_url,
 226                         'format_id': '%s-%sk' % (format_id, bitrate),
 227                         'tbr': bitrate,
 228                     })
 229                     if re.search(r'\d+k', h264_url):
 230                         http_url = h264_url
 231             elif format_id == 'rtmp':
 232                 streamer = talk_info.get('streamer')
 233                 if not streamer:
 234                     continue
 235                 for resource in resources:
 236                     formats.append({
 237                         'format_id': '%s-%s' % (format_id, resource.get('name')),
 238                         'url': streamer,
 239                         'play_path': resource['file'],
 240                         'ext': 'flv',
 241                         'width': int_or_none(resource.get('width')),
 242                         'height': int_or_none(resource.get('height')),
 243                         'tbr': int_or_none(resource.get('bitrate')),
 244                     })
 245             elif format_id == 'hls':
 246                 formats.extend(self._extract_m3u8_formats(
 247                     resources.get('stream'), video_name, 'mp4', m3u8_id=format_id, fatal=False))
 248
 249         m3u8_formats = list(filter(
 250             lambda f: f.get('protocol') == 'm3u8' and f.get('vcodec') != 'none',
 251             formats))
 252         if http_url:
 253             for m3u8_format in m3u8_formats:
 254                 bitrate = self._search_regex(r'(\d+k)', m3u8_format['url'], 'bitrate', default=None)
 255                 if not bitrate:
 256                     continue
 257                 f = m3u8_format.copy()
 258                 f.update({
 259                     'url': re.sub(r'\d+k', bitrate, http_url),
 260                     'format_id': m3u8_format['format_id'].replace('hls', 'http'),
 261                     'protocol': 'http',
 262                 })
 263                 formats.append(f)
 264
 265         audio_download = talk_info.get('audioDownload')
 266         if audio_download:
 267             formats.append({
 268                 'url': audio_download,
 269                 'format_id': 'audio',
 270                 'vcodec': 'none',
 271             })
 272
 273         self._sort_formats(formats)
 274
 275         video_id = compat_str(talk_info['id'])
 276
 277         return {
 278             'id': video_id,
 279             'title': title,
 280             'uploader': player_talk.get('speaker') or talk_info.get('speaker'),
 281             'thumbnail': player_talk.get('thumb') or talk_info.get('thumb'),
 282             'description': self._og_search_description(webpage),
 283             'subtitles': self._get_subtitles(video_id, talk_info),
 284             'formats': formats,
 285             'duration': talk_info.get('duration'),
 286         }
 287
 288     def _get_subtitles(self, video_id, talk_info):
 289         sub_lang_list = {}
 290         for language in try_get(
 291                 talk_info,
 292                 (lambda x: x['downloads']['languages'],
 293                  lambda x: x['languages']), list):
 294             lang_code = language.get('languageCode') or language.get('ianaCode')
 295             if not lang_code:
 296                 continue
 297             sub_lang_list[lang_code] = [
 298                 {
 299                     'url': 'http://www.ted.com/talks/subtitles/id/%s/lang/%s/format/%s' % (video_id, lang_code, ext),
 300                     'ext': ext,
 301                 }
 302                 for ext in ['ted', 'srt']
 303             ]
 304         return sub_lang_list
 305
 306     def _watch_info(self, url, name):
 307         webpage = self._download_webpage(url, name)
 308
 309         config_json = self._html_search_regex(
 310             r'"pages\.jwplayer"\s*,\s*({.+?})\s*\)\s*</script>',
 311             webpage, 'config', default=None)
 312         if not config_json:
 313             embed_url = self._search_regex(
 314                 r"<iframe[^>]+class='pages-video-embed__video__object'[^>]+src='([^']+)'", webpage, 'embed url')
 315             return self.url_result(self._proto_relative_url(embed_url))
 316         config = json.loads(config_json)['config']
 317         video_url = config['video']['url']
 318         thumbnail = config.get('image', {}).get('url')
 319
 320         title = self._html_search_regex(
 321             r"(?s)<h1(?:\s+class='[^']+')?>(.+?)</h1>", webpage, 'title')
 322         description = self._html_search_regex(
 323             [
 324                 r'(?s)<h4 class="[^"]+" id="h3--about-this-talk">.*?</h4>(.*?)</div>',
 325                 r'(?s)<p><strong>About this talk:</strong>\s+(.*?)</p>',
 326             ],
 327             webpage, 'description', fatal=False)
 328
 329         return {
 330             'id': name,
 331             'url': video_url,
 332             'title': title,
 333             'thumbnail': thumbnail,
 334             'description': description,
 335         }