_ Git - youtube-dl/blob - 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         }