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[youtubedl] / youtube_dl / extractor / mit.py
1 from __future__ import unicode_literals
2
3 import re
4 import json
5
6 from .common import InfoExtractor
7 from .youtube import YoutubeIE
8 from ..compat import (
9 compat_urlparse,
10 )
11 from ..utils import (
12 clean_html,
13 ExtractorError,
14 get_element_by_id,
15 )
16
17
18 class TechTVMITIE(InfoExtractor):
19 IE_NAME = 'techtv.mit.edu'
20 _VALID_URL = r'https?://techtv\.mit\.edu/(?:videos|embeds)/(?P<id>\d+)'
21
22 _TEST = {
23 'url': 'http://techtv.mit.edu/videos/25418-mit-dna-learning-center-set',
24 'md5': '1f8cb3e170d41fd74add04d3c9330e5f',
25 'info_dict': {
26 'id': '25418',
27 'ext': 'mp4',
28 'title': 'MIT DNA Learning Center Set',
29 'description': 'md5:82313335e8a8a3f243351ba55bc1b474',
30 },
31 }
32
33 def _real_extract(self, url):
34 video_id = self._match_id(url)
35 raw_page = self._download_webpage(
36 'http://techtv.mit.edu/videos/%s' % video_id, video_id)
37 clean_page = re.compile(r'<!--.*?-->', re.S).sub('', raw_page)
38
39 base_url = self._search_regex(
40 r'ipadUrl: \'(.+?cloudfront.net/)', raw_page, 'base url')
41 formats_json = self._search_regex(
42 r'bitrates: (\[.+?\])', raw_page, 'video formats')
43 formats_mit = json.loads(formats_json)
44 formats = [
45 {
46 'format_id': f['label'],
47 'url': base_url + f['url'].partition(':')[2],
48 'ext': f['url'].partition(':')[0],
49 'format': f['label'],
50 'width': f['width'],
51 'vbr': f['bitrate'],
52 }
53 for f in formats_mit
54 ]
55
56 title = get_element_by_id('edit-title', clean_page)
57 description = clean_html(get_element_by_id('edit-description', clean_page))
58 thumbnail = self._search_regex(
59 r'playlist:.*?url: \'(.+?)\'',
60 raw_page, 'thumbnail', flags=re.DOTALL)
61
62 return {
63 'id': video_id,
64 'title': title,
65 'formats': formats,
66 'description': description,
67 'thumbnail': thumbnail,
68 }
69
70
71 class MITIE(TechTVMITIE):
72 IE_NAME = 'video.mit.edu'
73 _VALID_URL = r'https?://video\.mit\.edu/watch/(?P<title>[^/]+)'
74
75 _TEST = {
76 'url': 'http://video.mit.edu/watch/the-government-is-profiling-you-13222/',
77 'md5': '7db01d5ccc1895fc5010e9c9e13648da',
78 'info_dict': {
79 'id': '21783',
80 'ext': 'mp4',
81 'title': 'The Government is Profiling You',
82 'description': 'md5:ad5795fe1e1623b73620dbfd47df9afd',
83 },
84 }
85
86 def _real_extract(self, url):
87 mobj = re.match(self._VALID_URL, url)
88 page_title = mobj.group('title')
89 webpage = self._download_webpage(url, page_title)
90 embed_url = self._search_regex(
91 r'<iframe .*?src="(.+?)"', webpage, 'embed url')
92 return self.url_result(embed_url, ie='TechTVMIT')
93
94
95 class OCWMITIE(InfoExtractor):
96 IE_NAME = 'ocw.mit.edu'
97 _VALID_URL = r'^http://ocw\.mit\.edu/courses/(?P<topic>[a-z0-9\-]+)'
98 _BASE_URL = 'http://ocw.mit.edu/'
99
100 _TESTS = [
101 {
102 'url': 'http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-041-probabilistic-systems-analysis-and-applied-probability-fall-2010/video-lectures/lecture-7-multiple-variables-expectations-independence/',
103 'info_dict': {
104 'id': 'EObHWIEKGjA',
105 'ext': 'mp4',
106 'title': 'Lecture 7: Multiple Discrete Random Variables: Expectations, Conditioning, Independence',
107 'description': 'In this lecture, the professor discussed multiple random variables, expectations, and binomial distribution.',
108 'upload_date': '20121109',
109 'uploader_id': 'MIT',
110 'uploader': 'MIT OpenCourseWare',
111 # 'subtitles': 'http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-041-probabilistic-systems-analysis-and-applied-probability-fall-2010/video-lectures/lecture-7-multiple-variables-expectations-independence/MIT6_041F11_lec07_300k.mp4.srt'
112 }
113 },
114 {
115 'url': 'http://ocw.mit.edu/courses/mathematics/18-01sc-single-variable-calculus-fall-2010/1.-differentiation/part-a-definition-and-basic-rules/session-1-introduction-to-derivatives/',
116 'info_dict': {
117 'id': '7K1sB05pE0A',
118 'ext': 'mp4',
119 'title': 'Session 1: Introduction to Derivatives',
120 'upload_date': '20090818',
121 'uploader_id': 'MIT',
122 'uploader': 'MIT OpenCourseWare',
123 'description': 'This section contains lecture video excerpts, lecture notes, an interactive mathlet with supporting documents, and problem solving videos.',
124 # 'subtitles': 'http://ocw.mit.edu//courses/mathematics/18-01sc-single-variable-calculus-fall-2010/ocw-18.01-f07-lec01_300k.SRT'
125 }
126 }
127 ]
128
129 def _real_extract(self, url):
130 mobj = re.match(self._VALID_URL, url)
131 topic = mobj.group('topic')
132
133 webpage = self._download_webpage(url, topic)
134 title = self._html_search_meta('WT.cg_s', webpage)
135 description = self._html_search_meta('Description', webpage)
136
137 # search for call to ocw_embed_chapter_media(container_id, media_url, provider, page_url, image_url, start, stop, captions_file)
138 embed_chapter_media = re.search(r'ocw_embed_chapter_media\((.+?)\)', webpage)
139 if embed_chapter_media:
140 metadata = re.sub(r'[\'"]', '', embed_chapter_media.group(1))
141 metadata = re.split(r', ?', metadata)
142 yt = metadata[1]
143 subs = compat_urlparse.urljoin(self._BASE_URL, metadata[7])
144 else:
145 # search for call to ocw_embed_chapter_media(container_id, media_url, provider, page_url, image_url, captions_file)
146 embed_media = re.search(r'ocw_embed_media\((.+?)\)', webpage)
147 if embed_media:
148 metadata = re.sub(r'[\'"]', '', embed_media.group(1))
149 metadata = re.split(r', ?', metadata)
150 yt = metadata[1]
151 subs = compat_urlparse.urljoin(self._BASE_URL, metadata[5])
152 else:
153 raise ExtractorError('Unable to find embedded YouTube video.')
154 video_id = YoutubeIE.extract_id(yt)
155
156 return {
157 '_type': 'url_transparent',
158 'id': video_id,
159 'title': title,
160 'description': description,
161 'url': yt,
162 'url_transparent'
163 'subtitles': subs,
164 'ie_key': 'Youtube',
165 }