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[youtubedl] / 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 (
9 compat_str,
10 compat_urlparse
11 )
12 from ..utils import (
13 extract_attributes,
14 float_or_none,
15 int_or_none,
16 try_get,
17 url_or_none,
18 )
19
20
21 class TEDIE(InfoExtractor):
22 IE_NAME = 'ted'
23 _VALID_URL = r'''(?x)
24 (?P<proto>https?://)
25 (?P<type>www|embed(?:-ssl)?)(?P<urlmain>\.ted\.com/
26 (
27 (?P<type_playlist>playlists(?:/(?P<playlist_id>\d+))?) # We have a playlist
28 |
29 ((?P<type_talk>talks)) # We have a simple talk
30 |
31 (?P<type_watch>watch)/[^/]+/[^/]+
32 )
33 (/lang/(.*?))? # The url may contain the language
34 /(?P<name>[\w-]+) # Here goes the name and then ".html"
35 .*)$
36 '''
37 _TESTS = [{
38 'url': 'http://www.ted.com/talks/dan_dennett_on_our_consciousness.html',
39 'md5': 'b0ce2b05ca215042124fbc9e3886493a',
40 'info_dict': {
41 'id': '102',
42 'ext': 'mp4',
43 'title': 'The illusion of consciousness',
44 'description': ('Philosopher Dan Dennett makes a compelling '
45 'argument that not only don\'t we understand our own '
46 'consciousness, but that half the time our brains are '
47 'actively fooling us.'),
48 'uploader': 'Dan Dennett',
49 'width': 853,
50 'duration': 1308,
51 'view_count': int,
52 'comment_count': int,
53 'tags': list,
54 },
55 'params': {
56 'skip_download': True,
57 },
58 }, {
59 # missing HTTP bitrates
60 'url': 'https://www.ted.com/talks/vishal_sikka_the_beauty_and_power_of_algorithms',
61 'info_dict': {
62 'id': '6069',
63 'ext': 'mp4',
64 'title': 'The beauty and power of algorithms',
65 'thumbnail': r're:^https?://.+\.jpg',
66 'description': 'md5:734e352710fb00d840ab87ae31aaf688',
67 'uploader': 'Vishal Sikka',
68 },
69 'params': {
70 'skip_download': True,
71 },
72 }, {
73 'url': 'http://www.ted.com/talks/gabby_giffords_and_mark_kelly_be_passionate_be_courageous_be_your_best',
74 'md5': 'e6b9617c01a7970ceac8bb2c92c346c0',
75 'info_dict': {
76 'id': '1972',
77 'ext': 'mp4',
78 'title': 'Be passionate. Be courageous. Be your best.',
79 'uploader': 'Gabby Giffords and Mark Kelly',
80 'description': 'md5:5174aed4d0f16021b704120360f72b92',
81 'duration': 1128,
82 },
83 'params': {
84 'skip_download': True,
85 },
86 }, {
87 'url': 'http://www.ted.com/playlists/who_are_the_hackers',
88 'info_dict': {
89 'id': '10',
90 'title': 'Who are the hackers?',
91 'description': 'md5:49a0dbe8fb76d81a0e64b4a80af7f15a'
92 },
93 'playlist_mincount': 6,
94 }, {
95 # contains a youtube video
96 'url': 'https://www.ted.com/talks/douglas_adams_parrots_the_universe_and_everything',
97 'add_ie': ['Youtube'],
98 'info_dict': {
99 'id': '_ZG8HBuDjgc',
100 'ext': 'webm',
101 'title': 'Douglas Adams: Parrots the Universe and Everything',
102 'description': 'md5:01ad1e199c49ac640cb1196c0e9016af',
103 'uploader': 'University of California Television (UCTV)',
104 'uploader_id': 'UCtelevision',
105 'upload_date': '20080522',
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 'view_count': int,
120 'comment_count': int,
121 'tags': list,
122 },
123 'params': {
124 'skip_download': True,
125 },
126 }]
127
128 _NATIVE_FORMATS = {
129 'low': {'width': 320, 'height': 180},
130 'medium': {'width': 512, 'height': 288},
131 'high': {'width': 854, 'height': 480},
132 }
133
134 def _extract_info(self, webpage):
135 info_json = self._search_regex(
136 r'(?s)q\(\s*"\w+.init"\s*,\s*({.+?})\)\s*</script>',
137 webpage, 'info json')
138 return json.loads(info_json)
139
140 def _real_extract(self, url):
141 m = re.match(self._VALID_URL, url, re.VERBOSE)
142 if m.group('type').startswith('embed'):
143 desktop_url = m.group('proto') + 'www' + m.group('urlmain')
144 return self.url_result(desktop_url, 'TED')
145 name = m.group('name')
146 if m.group('type_talk'):
147 return self._talk_info(url, name)
148 elif m.group('type_watch'):
149 return self._watch_info(url, name)
150 else:
151 return self._playlist_videos_info(url, name)
152
153 def _playlist_videos_info(self, url, name):
154 '''Returns the videos of the playlist'''
155
156 webpage = self._download_webpage(url, name,
157 'Downloading playlist webpage')
158
159 playlist_entries = []
160 for entry in re.findall(r'(?s)<[^>]+data-ga-context=["\']playlist["\'][^>]*>', webpage):
161 attrs = extract_attributes(entry)
162 entry_url = compat_urlparse.urljoin(url, attrs['href'])
163 playlist_entries.append(self.url_result(entry_url, self.ie_key()))
164
165 final_url = self._og_search_url(webpage, fatal=False)
166 playlist_id = (
167 re.match(self._VALID_URL, final_url).group('playlist_id')
168 if final_url else None)
169
170 return self.playlist_result(
171 playlist_entries, playlist_id=playlist_id,
172 playlist_title=self._og_search_title(webpage, fatal=False),
173 playlist_description=self._og_search_description(webpage))
174
175 def _talk_info(self, url, video_name):
176 webpage = self._download_webpage(url, video_name)
177
178 info = self._extract_info(webpage)
179
180 data = try_get(info, lambda x: x['__INITIAL_DATA__'], dict) or info
181 talk_info = data['talks'][0]
182
183 title = talk_info['title'].strip()
184
185 native_downloads = try_get(
186 talk_info,
187 (lambda x: x['downloads']['nativeDownloads'],
188 lambda x: x['nativeDownloads']),
189 dict) or {}
190
191 formats = [{
192 'url': format_url,
193 'format_id': format_id,
194 'format': format_id,
195 } for (format_id, format_url) in native_downloads.items() if format_url is not None]
196 if formats:
197 for f in formats:
198 finfo = self._NATIVE_FORMATS.get(f['format_id'])
199 if finfo:
200 f.update(finfo)
201
202 player_talk = talk_info['player_talks'][0]
203
204 external = player_talk.get('external')
205 if isinstance(external, dict):
206 service = external.get('service')
207 if isinstance(service, compat_str):
208 ext_url = None
209 if service.lower() == 'youtube':
210 ext_url = external.get('code')
211
212 return self.url_result(ext_url or external['uri'])
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 if not isinstance(resources, dict):
247 continue
248 stream_url = url_or_none(resources.get('stream'))
249 if not stream_url:
250 continue
251 formats.extend(self._extract_m3u8_formats(
252 stream_url, video_name, 'mp4', m3u8_id=format_id,
253 fatal=False))
254
255 m3u8_formats = list(filter(
256 lambda f: f.get('protocol') == 'm3u8' and f.get('vcodec') != 'none',
257 formats))
258 if http_url:
259 for m3u8_format in m3u8_formats:
260 bitrate = self._search_regex(r'(\d+k)', m3u8_format['url'], 'bitrate', default=None)
261 if not bitrate:
262 continue
263 bitrate_url = re.sub(r'\d+k', bitrate, http_url)
264 if not self._is_valid_url(
265 bitrate_url, video_name, '%s bitrate' % bitrate):
266 continue
267 f = m3u8_format.copy()
268 f.update({
269 'url': bitrate_url,
270 'format_id': m3u8_format['format_id'].replace('hls', 'http'),
271 'protocol': 'http',
272 })
273 if f.get('acodec') == 'none':
274 del f['acodec']
275 formats.append(f)
276
277 audio_download = talk_info.get('audioDownload')
278 if audio_download:
279 formats.append({
280 'url': audio_download,
281 'format_id': 'audio',
282 'vcodec': 'none',
283 })
284
285 self._sort_formats(formats)
286
287 video_id = compat_str(talk_info['id'])
288
289 return {
290 'id': video_id,
291 'title': title,
292 'uploader': player_talk.get('speaker') or talk_info.get('speaker'),
293 'thumbnail': player_talk.get('thumb') or talk_info.get('thumb'),
294 'description': self._og_search_description(webpage),
295 'subtitles': self._get_subtitles(video_id, talk_info),
296 'formats': formats,
297 'duration': float_or_none(talk_info.get('duration')),
298 'view_count': int_or_none(data.get('viewed_count')),
299 'comment_count': int_or_none(
300 try_get(data, lambda x: x['comments']['count'])),
301 'tags': try_get(talk_info, lambda x: x['tags'], list),
302 }
303
304 def _get_subtitles(self, video_id, talk_info):
305 sub_lang_list = {}
306 for language in try_get(
307 talk_info,
308 (lambda x: x['downloads']['languages'],
309 lambda x: x['languages']), list):
310 lang_code = language.get('languageCode') or language.get('ianaCode')
311 if not lang_code:
312 continue
313 sub_lang_list[lang_code] = [
314 {
315 'url': 'http://www.ted.com/talks/subtitles/id/%s/lang/%s/format/%s' % (video_id, lang_code, ext),
316 'ext': ext,
317 }
318 for ext in ['ted', 'srt']
319 ]
320 return sub_lang_list
321
322 def _watch_info(self, url, name):
323 webpage = self._download_webpage(url, name)
324
325 config_json = self._html_search_regex(
326 r'"pages\.jwplayer"\s*,\s*({.+?})\s*\)\s*</script>',
327 webpage, 'config', default=None)
328 if not config_json:
329 embed_url = self._search_regex(
330 r"<iframe[^>]+class='pages-video-embed__video__object'[^>]+src='([^']+)'", webpage, 'embed url')
331 return self.url_result(self._proto_relative_url(embed_url))
332 config = json.loads(config_json)['config']
333 video_url = config['video']['url']
334 thumbnail = config.get('image', {}).get('url')
335
336 title = self._html_search_regex(
337 r"(?s)<h1(?:\s+class='[^']+')?>(.+?)</h1>", webpage, 'title')
338 description = self._html_search_regex(
339 [
340 r'(?s)<h4 class="[^"]+" id="h3--about-this-talk">.*?</h4>(.*?)</div>',
341 r'(?s)<p><strong>About this talk:</strong>\s+(.*?)</p>',
342 ],
343 webpage, 'description', fatal=False)
344
345 return {
346 'id': name,
347 'url': video_url,
348 'title': title,
349 'thumbnail': thumbnail,
350 'description': description,
351 }