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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 f.get('format_id') == 'hls-meta':
202                         continue
203                     if not f.get('height'):
204                         f['vcodec'] = 'none'
205                     else:
206                         f['acodec'] = 'none'
207                 formats.extend(hls_formats)
208
209         audio_download = talk_info.get('audioDownload')
210         if audio_download:
211             formats.append({
212                 'url': audio_download,
213                 'format_id': 'audio',
214                 'vcodec': 'none',
215                 'preference': -0.5,
216             })
217
218         self._sort_formats(formats)
219
220         video_id = compat_str(talk_info['id'])
221
222         thumbnail = talk_info['thumb']
223         if not thumbnail.startswith('http'):
224             thumbnail = 'http://' + thumbnail
225         return {
226             'id': video_id,
227             'title': talk_info['title'].strip(),
228             'uploader': talk_info['speaker'],
229             'thumbnail': thumbnail,
230             'description': self._og_search_description(webpage),
231             'subtitles': self._get_subtitles(video_id, talk_info),
232             'formats': formats,
233             'duration': talk_info.get('duration'),
234         }
235
236     def _get_subtitles(self, video_id, talk_info):
237         languages = [lang['languageCode'] for lang in talk_info.get('languages', [])]
238         if languages:
239             sub_lang_list = {}
240             for l in languages:
241                 sub_lang_list[l] = [
242                     {
243                         'url': 'http://www.ted.com/talks/subtitles/id/%s/lang/%s/format/%s' % (video_id, l, ext),
244                         'ext': ext,
245                     }
246                     for ext in ['ted', 'srt']
247                 ]
248             return sub_lang_list
249         else:
250             return {}
251
252     def _watch_info(self, url, name):
253         webpage = self._download_webpage(url, name)
254
255         config_json = self._html_search_regex(
256             r'"pages\.jwplayer"\s*,\s*({.+?})\s*\)\s*</script>',
257             webpage, 'config')
258         config = json.loads(config_json)['config']
259         video_url = config['video']['url']
260         thumbnail = config.get('image', {}).get('url')
261
262         title = self._html_search_regex(
263             r"(?s)<h1(?:\s+class='[^']+')?>(.+?)</h1>", webpage, 'title')
264         description = self._html_search_regex(
265             [
266                 r'(?s)<h4 class="[^"]+" id="h3--about-this-talk">.*?</h4>(.*?)</div>',
267                 r'(?s)<p><strong>About this talk:</strong>\s+(.*?)</p>',
268             ],
269             webpage, 'description', fatal=False)
270
271         return {
272             'id': name,
273             'url': video_url,
274             'title': title,
275             'thumbnail': thumbnail,
276             'description': description,
277         }