_ Git - youtube-dl/blob - 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 int_or_none
  10
  11
  12 class TEDIE(InfoExtractor):
  13     IE_NAME = 'ted'
  14     _VALID_URL = r'''(?x)
  15         (?P<proto>https?://)
  16         (?P<type>www|embed(?:-ssl)?)(?P<urlmain>\.ted\.com/
  17         (
  18             (?P<type_playlist>playlists(?:/\d+)?) # We have a playlist
  19             |
  20             ((?P<type_talk>talks)) # We have a simple talk
  21             |
  22             (?P<type_watch>watch)/[^/]+/[^/]+
  23         )
  24         (/lang/(.*?))? # The url may contain the language
  25         /(?P<name>[\w-]+) # Here goes the name and then ".html"
  26         .*)$
  27         '''
  28     _TESTS = [{
  29         'url': 'http://www.ted.com/talks/dan_dennett_on_our_consciousness.html',
  30         'md5': 'fc94ac279feebbce69f21c0c6ee82810',
  31         'info_dict': {
  32             'id': '102',
  33             'ext': 'mp4',
  34             'title': 'The illusion of consciousness',
  35             'description': ('Philosopher Dan Dennett makes a compelling '
  36                             'argument that not only don\'t we understand our own '
  37                             'consciousness, but that half the time our brains are '
  38                             'actively fooling us.'),
  39             'uploader': 'Dan Dennett',
  40             'width': 854,
  41             'duration': 1308,
  42         }
  43     }, {
  44         'url': 'http://www.ted.com/watch/ted-institute/ted-bcg/vishal-sikka-the-beauty-and-power-of-algorithms',
  45         'md5': '226f4fb9c62380d11b7995efa4c87994',
  46         'info_dict': {
  47             'id': 'vishal-sikka-the-beauty-and-power-of-algorithms',
  48             'ext': 'mp4',
  49             'title': 'Vishal Sikka: The beauty and power of algorithms',
  50             'thumbnail': 're:^https?://.+\.jpg',
  51             'description': 'Adaptive, intelligent, and consistent, algorithms are emerging as the ultimate app for everything from matching consumers to products to assessing medical diagnoses. Vishal Sikka shares his appreciation for the algorithm, charting both its inherent beauty and its growing power.',
  52         }
  53     }, {
  54         'url': 'http://www.ted.com/talks/gabby_giffords_and_mark_kelly_be_passionate_be_courageous_be_your_best',
  55         'info_dict': {
  56             'id': '1972',
  57             'ext': 'mp4',
  58             'title': 'Be passionate. Be courageous. Be your best.',
  59             'uploader': 'Gabby Giffords and Mark Kelly',
  60             'description': 'md5:5174aed4d0f16021b704120360f72b92',
  61             'duration': 1128,
  62         },
  63     }, {
  64         'url': 'http://www.ted.com/playlists/who_are_the_hackers',
  65         'info_dict': {
  66             'id': '10',
  67             'title': 'Who are the hackers?',
  68         },
  69         'playlist_mincount': 6,
  70     }, {
  71         # contains a youtube video
  72         'url': 'https://www.ted.com/talks/douglas_adams_parrots_the_universe_and_everything',
  73         'add_ie': ['Youtube'],
  74         'info_dict': {
  75             'id': '_ZG8HBuDjgc',
  76             'ext': 'mp4',
  77             'title': 'Douglas Adams: Parrots the Universe and Everything',
  78             'description': 'md5:01ad1e199c49ac640cb1196c0e9016af',
  79             'uploader': 'University of California Television (UCTV)',
  80             'uploader_id': 'UCtelevision',
  81             'upload_date': '20080522',
  82         },
  83         'params': {
  84             'skip_download': True,
  85         },
  86     }, {
  87         # YouTube video
  88         'url': 'http://www.ted.com/talks/jeffrey_kluger_the_sibling_bond',
  89         'add_ie': ['Youtube'],
  90         'info_dict': {
  91             'id': 'aFBIPO-P7LM',
  92             'ext': 'mp4',
  93             'title': 'The hidden power of siblings: Jeff Kluger at TEDxAsheville',
  94             'description': 'md5:3d7a4f50d95ca5dd67104e2a20f43fe1',
  95             'uploader': 'TEDx Talks',
  96             'uploader_id': 'TEDxTalks',
  97             'upload_date': '20111216',
  98         },
  99         'params': {
 100             'skip_download': True,
 101         },
 102     }]
 103
 104     _NATIVE_FORMATS = {
 105         'low': {'preference': 1, 'width': 320, 'height': 180},
 106         'medium': {'preference': 2, 'width': 512, 'height': 288},
 107         'high': {'preference': 3, 'width': 854, 'height': 480},
 108     }
 109
 110     def _extract_info(self, webpage):
 111         info_json = self._search_regex(r'q\("\w+.init",({.+})\)</script>',
 112                                        webpage, 'info json')
 113         return json.loads(info_json)
 114
 115     def _real_extract(self, url):
 116         m = re.match(self._VALID_URL, url, re.VERBOSE)
 117         if m.group('type').startswith('embed'):
 118             desktop_url = m.group('proto') + 'www' + m.group('urlmain')
 119             return self.url_result(desktop_url, 'TED')
 120         name = m.group('name')
 121         if m.group('type_talk'):
 122             return self._talk_info(url, name)
 123         elif m.group('type_watch'):
 124             return self._watch_info(url, name)
 125         else:
 126             return self._playlist_videos_info(url, name)
 127
 128     def _playlist_videos_info(self, url, name):
 129         '''Returns the videos of the playlist'''
 130
 131         webpage = self._download_webpage(url, name,
 132                                          'Downloading playlist webpage')
 133         info = self._extract_info(webpage)
 134         playlist_info = info['playlist']
 135
 136         playlist_entries = [
 137             self.url_result('http://www.ted.com/talks/' + talk['slug'], self.ie_key())
 138             for talk in info['talks']
 139         ]
 140         return self.playlist_result(
 141             playlist_entries,
 142             playlist_id=compat_str(playlist_info['id']),
 143             playlist_title=playlist_info['title'])
 144
 145     def _talk_info(self, url, video_name):
 146         webpage = self._download_webpage(url, video_name)
 147         self.report_extraction(video_name)
 148
 149         talk_info = self._extract_info(webpage)['talks'][0]
 150
 151         external = talk_info.get('external')
 152         if external:
 153             service = external['service']
 154             self.to_screen('Found video from %s' % service)
 155             ext_url = None
 156             if service.lower() == 'youtube':
 157                 ext_url = external.get('code')
 158             return {
 159                 '_type': 'url',
 160                 'url': ext_url or external['uri'],
 161             }
 162
 163         formats = [{
 164             'url': format_url,
 165             'format_id': format_id,
 166             'format': format_id,
 167         } for (format_id, format_url) in talk_info['nativeDownloads'].items() if format_url is not None]
 168         if formats:
 169             for f in formats:
 170                 finfo = self._NATIVE_FORMATS.get(f['format_id'])
 171                 if finfo:
 172                     f.update(finfo)
 173
 174         for format_id, resources in talk_info['resources'].items():
 175             if format_id == 'h264':
 176                 for resource in resources:
 177                     bitrate = int_or_none(resource.get('bitrate'))
 178                     formats.append({
 179                         'url': resource['file'],
 180                         'format_id': '%s-%sk' % (format_id, bitrate),
 181                         'tbr': bitrate,
 182                     })
 183             elif format_id == 'rtmp':
 184                 streamer = talk_info.get('streamer')
 185                 if not streamer:
 186                     continue
 187                 for resource in resources:
 188                     formats.append({
 189                         'format_id': '%s-%s' % (format_id, resource.get('name')),
 190                         'url': streamer,
 191                         'play_path': resource['file'],
 192                         'ext': 'flv',
 193                         'width': int_or_none(resource.get('width')),
 194                         'height': int_or_none(resource.get('height')),
 195                         'tbr': int_or_none(resource.get('bitrate')),
 196                     })
 197             elif format_id == 'hls':
 198                 hls_formats = self._extract_m3u8_formats(
 199                     resources.get('stream'), video_name, 'mp4', m3u8_id=format_id)
 200                 for f in hls_formats:
 201                     if not f.get('height'):
 202                         f['vcodec'] = 'none'
 203                     else:
 204                         f['acodec'] = 'none'
 205                 formats.extend(hls_formats)
 206
 207         audio_download = talk_info.get('audioDownload')
 208         if audio_download:
 209             formats.append({
 210                 'url': audio_download,
 211                 'format_id': 'audio',
 212                 'vcodec': 'none',
 213             })
 214
 215         self._sort_formats(formats)
 216
 217         video_id = compat_str(talk_info['id'])
 218
 219         thumbnail = talk_info['thumb']
 220         if not thumbnail.startswith('http'):
 221             thumbnail = 'http://' + thumbnail
 222         return {
 223             'id': video_id,
 224             'title': talk_info['title'].strip(),
 225             'uploader': talk_info['speaker'],
 226             'thumbnail': thumbnail,
 227             'description': self._og_search_description(webpage),
 228             'subtitles': self._get_subtitles(video_id, talk_info),
 229             'formats': formats,
 230             'duration': talk_info.get('duration'),
 231         }
 232
 233     def _get_subtitles(self, video_id, talk_info):
 234         languages = [lang['languageCode'] for lang in talk_info.get('languages', [])]
 235         if languages:
 236             sub_lang_list = {}
 237             for l in languages:
 238                 sub_lang_list[l] = [
 239                     {
 240                         'url': 'http://www.ted.com/talks/subtitles/id/%s/lang/%s/format/%s' % (video_id, l, ext),
 241                         'ext': ext,
 242                     }
 243                     for ext in ['ted', 'srt']
 244                 ]
 245             return sub_lang_list
 246         else:
 247             return {}
 248
 249     def _watch_info(self, url, name):
 250         webpage = self._download_webpage(url, name)
 251
 252         config_json = self._html_search_regex(
 253             r'"pages\.jwplayer"\s*,\s*({.+?})\s*\)\s*</script>',
 254             webpage, 'config')
 255         config = json.loads(config_json)['config']
 256         video_url = config['video']['url']
 257         thumbnail = config.get('image', {}).get('url')
 258
 259         title = self._html_search_regex(
 260             r"(?s)<h1(?:\s+class='[^']+')?>(.+?)</h1>", webpage, 'title')
 261         description = self._html_search_regex(
 262             [
 263                 r'(?s)<h4 class="[^"]+" id="h3--about-this-talk">.*?</h4>(.*?)</div>',
 264                 r'(?s)<p><strong>About this talk:</strong>\s+(.*?)</p>',
 265             ],
 266             webpage, 'description', fatal=False)
 267
 268         return {
 269             'id': name,
 270             'url': video_url,
 271             'title': title,
 272             'thumbnail': thumbnail,
 273             'description': description,
 274         }