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