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youtube-dl

[mirror] Download/Watch videos from video hostersgit clone https://hacktivis.me/git/mirror/youtube-dl.git

hls.py (10181B)

    

  1. from __future__ import unicode_literals
  3. import re
  4. import binascii
  5. try:
  6.     from Crypto.Cipher import AES
  7.     can_decrypt_frag = True
  8. except ImportError:
  9.     can_decrypt_frag = False
  11. from .fragment import FragmentFD
  12. from .external import FFmpegFD
  14. from ..compat import (
  15.     compat_urllib_error,
  16.     compat_urlparse,
  17.     compat_struct_pack,
  18. )
  19. from ..utils import (
  20.     parse_m3u8_attributes,
  21.     update_url_query,
  22. )
  25. class HlsFD(FragmentFD):
  26.     """ A limited implementation that does not require ffmpeg """
  28.     FD_NAME = 'hlsnative'
  30.     @staticmethod
  31.     def can_download(manifest, info_dict):
  32.         UNSUPPORTED_FEATURES = (
  33.             r'#EXT-X-KEY:METHOD=(?!NONE|AES-128)',  # encrypted streams [1]
  34.             # r'#EXT-X-BYTERANGE',  # playlists composed of byte ranges of media files [2]
  36.             # Live streams heuristic does not always work (e.g. geo restricted to Germany
  37.             # http://hls-geo.daserste.de/i/videoportal/Film/c_620000/622873/format,716451,716457,716450,716458,716459,.mp4.csmil/index_4_av.m3u8?null=0)
  38.             # r'#EXT-X-MEDIA-SEQUENCE:(?!0$)',  # live streams [3]
  40.             # This heuristic also is not correct since segments may not be appended as well.
  41.             # Twitch vods of finished streams have EXT-X-PLAYLIST-TYPE:EVENT despite
  42.             # no segments will definitely be appended to the end of the playlist.
  43.             # r'#EXT-X-PLAYLIST-TYPE:EVENT',  # media segments may be appended to the end of
  44.             #                                 # event media playlists [4]
  45.             r'#EXT-X-MAP:',  # media initialization [5]
  47.             # 1. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.2.4
  48.             # 2. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.2.2
  49.             # 3. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.3.2
  50.             # 4. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.3.5
  51.             # 5. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.2.5
  52.         )
  53.         check_results = [not re.search(feature, manifest) for feature in UNSUPPORTED_FEATURES]
  54.         is_aes128_enc = '#EXT-X-KEY:METHOD=AES-128' in manifest
  55.         check_results.append(can_decrypt_frag or not is_aes128_enc)
  56.         check_results.append(not (is_aes128_enc and r'#EXT-X-BYTERANGE' in manifest))
  57.         check_results.append(not info_dict.get('is_live'))
  58.         return all(check_results)
  60.     def real_download(self, filename, info_dict):
  61.         man_url = info_dict['url']
  62.         self.to_screen('[%s] Downloading m3u8 manifest' % self.FD_NAME)
  64.         urlh = self.ydl.urlopen(self._prepare_url(info_dict, man_url))
  65.         man_url = urlh.geturl()
  66.         s = urlh.read().decode('utf-8', 'ignore')
  68.         if not self.can_download(s, info_dict):
  69.             if info_dict.get('extra_param_to_segment_url') or info_dict.get('_decryption_key_url'):
  70.                 self.report_error('pycrypto not found. Please install it.')
  71.                 return False
  72.             self.report_warning(
  73.                 'hlsnative has detected features it does not support, '
  74.                 'extraction will be delegated to ffmpeg')
  75.             fd = FFmpegFD(self.ydl, self.params)
  76.             for ph in self._progress_hooks:
  77.                 fd.add_progress_hook(ph)
  78.             return fd.real_download(filename, info_dict)
  80.         def is_ad_fragment_start(s):
  81.             return (s.startswith('#ANVATO-SEGMENT-INFO') and 'type=ad' in s
  82.                     or s.startswith('#UPLYNK-SEGMENT') and s.endswith(',ad'))
  84.         def is_ad_fragment_end(s):
  85.             return (s.startswith('#ANVATO-SEGMENT-INFO') and 'type=master' in s
  86.                     or s.startswith('#UPLYNK-SEGMENT') and s.endswith(',segment'))
  88.         media_frags = 0
  89.         ad_frags = 0
  90.         ad_frag_next = False
  91.         for line in s.splitlines():
  92.             line = line.strip()
  93.             if not line:
  94.                 continue
  95.             if line.startswith('#'):
  96.                 if is_ad_fragment_start(line):
  97.                     ad_frag_next = True
  98.                 elif is_ad_fragment_end(line):
  99.                     ad_frag_next = False
  100.                 continue
  101.             if ad_frag_next:
  102.                 ad_frags += 1
  103.                 continue
  104.             media_frags += 1
  106.         ctx = {
  107.             'filename': filename,
  108.             'total_frags': media_frags,
  109.             'ad_frags': ad_frags,
  110.         }
  112.         self._prepare_and_start_frag_download(ctx)
  114.         fragment_retries = self.params.get('fragment_retries', 0)
  115.         skip_unavailable_fragments = self.params.get('skip_unavailable_fragments', True)
  116.         test = self.params.get('test', False)
  118.         extra_query = None
  119.         extra_param_to_segment_url = info_dict.get('extra_param_to_segment_url')
  120.         if extra_param_to_segment_url:
  121.             extra_query = compat_urlparse.parse_qs(extra_param_to_segment_url)
  122.         i = 0
  123.         media_sequence = 0
  124.         decrypt_info = {'METHOD': 'NONE'}
  125.         byte_range = {}
  126.         frag_index = 0
  127.         ad_frag_next = False
  128.         for line in s.splitlines():
  129.             line = line.strip()
  130.             if line:
  131.                 if not line.startswith('#'):
  132.                     if ad_frag_next:
  133.                         continue
  134.                     frag_index += 1
  135.                     if frag_index <= ctx['fragment_index']:
  136.                         continue
  137.                     frag_url = (
  138.                         line
  139.                         if re.match(r'^https?://', line)
  140.                         else compat_urlparse.urljoin(man_url, line))
  141.                     if extra_query:
  142.                         frag_url = update_url_query(frag_url, extra_query)
  143.                     count = 0
  144.                     headers = info_dict.get('http_headers', {})
  145.                     if byte_range:
  146.                         headers['Range'] = 'bytes=%d-%d' % (byte_range['start'], byte_range['end'] - 1)
  147.                     while count <= fragment_retries:
  148.                         try:
  149.                             success, frag_content = self._download_fragment(
  150.                                 ctx, frag_url, info_dict, headers)
  151.                             if not success:
  152.                                 return False
  153.                             break
  154.                         except compat_urllib_error.HTTPError as err:
  155.                             # Unavailable (possibly temporary) fragments may be served.
  156.                             # First we try to retry then either skip or abort.
  157.                             # See https://github.com/ytdl-org/youtube-dl/issues/10165,
  158.                             # https://github.com/ytdl-org/youtube-dl/issues/10448).
  159.                             count += 1
  160.                             if count <= fragment_retries:
  161.                                 self.report_retry_fragment(err, frag_index, count, fragment_retries)
  162.                     if count > fragment_retries:
  163.                         if skip_unavailable_fragments:
  164.                             i += 1
  165.                             media_sequence += 1
  166.                             self.report_skip_fragment(frag_index)
  167.                             continue
  168.                         self.report_error(
  169.                             'giving up after %s fragment retries' % fragment_retries)
  170.                         return False
  171.                     if decrypt_info['METHOD'] == 'AES-128':
  172.                         iv = decrypt_info.get('IV') or compat_struct_pack('>8xq', media_sequence)
  173.                         decrypt_info['KEY'] = decrypt_info.get('KEY') or self.ydl.urlopen(
  174.                             self._prepare_url(info_dict, info_dict.get('_decryption_key_url') or decrypt_info['URI'])).read()
  175.                         # Don't decrypt the content in tests since the data is explicitly truncated and it's not to a valid block
  176.                         # size (see https://github.com/ytdl-org/youtube-dl/pull/27660). Tests only care that the correct data downloaded,
  177.                         # not what it decrypts to.
  178.                         if not test:
  179.                             frag_content = AES.new(
  180.                                 decrypt_info['KEY'], AES.MODE_CBC, iv).decrypt(frag_content)
  181.                     self._append_fragment(ctx, frag_content)
  182.                     # We only download the first fragment during the test
  183.                     if test:
  184.                         break
  185.                     i += 1
  186.                     media_sequence += 1
  187.                 elif line.startswith('#EXT-X-KEY'):
  188.                     decrypt_url = decrypt_info.get('URI')
  189.                     decrypt_info = parse_m3u8_attributes(line[11:])
  190.                     if decrypt_info['METHOD'] == 'AES-128':
  191.                         if 'IV' in decrypt_info:
  192.                             decrypt_info['IV'] = binascii.unhexlify(decrypt_info['IV'][2:].zfill(32))
  193.                         if not re.match(r'^https?://', decrypt_info['URI']):
  194.                             decrypt_info['URI'] = compat_urlparse.urljoin(
  195.                                 man_url, decrypt_info['URI'])
  196.                         if extra_query:
  197.                             decrypt_info['URI'] = update_url_query(decrypt_info['URI'], extra_query)
  198.                         if decrypt_url != decrypt_info['URI']:
  199.                             decrypt_info['KEY'] = None
  200.                 elif line.startswith('#EXT-X-MEDIA-SEQUENCE'):
  201.                     media_sequence = int(line[22:])
  202.                 elif line.startswith('#EXT-X-BYTERANGE'):
  203.                     splitted_byte_range = line[17:].split('@')
  204.                     sub_range_start = int(splitted_byte_range[1]) if len(splitted_byte_range) == 2 else byte_range['end']
  205.                     byte_range = {
  206.                         'start': sub_range_start,
  207.                         'end': sub_range_start + int(splitted_byte_range[0]),
  208.                     }
  209.                 elif is_ad_fragment_start(line):
  210.                     ad_frag_next = True
  211.                 elif is_ad_fragment_end(line):
  212.                     ad_frag_next = False
  214.         self._finish_frag_download(ctx)
  216.         return True