1 from __future__ import unicode_literals
7 from Crypto.Cipher import AES
8 can_decrypt_frag = True
10 can_decrypt_frag = False
12 from .fragment import FragmentFD
13 from .external import FFmpegFD
15 from ..compat import (
23 parse_m3u8_attributes,
28 class HlsFD(FragmentFD):
29 """ A limited implementation that does not require ffmpeg """
33 def _delegate_to_ffmpeg(self, filename, info_dict):
35 'hlsnative has detected features it does not support, '
36 'extraction will be delegated to ffmpeg')
37 fd = FFmpegFD(self.ydl, self.params)
38 for ph in self._progress_hooks:
39 fd.add_progress_hook(ph)
40 return fd.real_download(filename, info_dict)
43 def can_download(manifest, info_dict):
44 UNSUPPORTED_FEATURES = (
45 r'#EXT-X-KEY:METHOD=(?!NONE|AES-128)', # encrypted streams [1]
46 r'#EXT-X-BYTERANGE', # playlists composed of byte ranges of media files [2]
48 # Live streams heuristic does not always work (e.g. geo restricted to Germany
49 # 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)
50 # r'#EXT-X-MEDIA-SEQUENCE:(?!0$)', # live streams [3]
52 # This heuristic also is not correct since segments may not be appended as well.
53 # Twitch vods of finished streams have EXT-X-PLAYLIST-TYPE:EVENT despite
54 # no segments will definitely be appended to the end of the playlist.
55 # r'#EXT-X-PLAYLIST-TYPE:EVENT', # media segments may be appended to the end of
56 # # event media playlists [4]
58 # 1. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.2.4
59 # 2. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.2.2
60 # 3. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.3.2
61 # 4. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.3.5
63 check_results = [not re.search(feature, manifest) for feature in UNSUPPORTED_FEATURES]
64 check_results.append(can_decrypt_frag or '#EXT-X-KEY:METHOD=AES-128' not in manifest)
65 return all(check_results)
67 def real_download(self, filename, info_dict):
68 if info_dict.get('is_live'):
69 return self._delegate_to_ffmpeg(filename, info_dict)
71 man_url = info_dict['url']
72 self.to_screen('[%s] Downloading m3u8 manifest' % self.FD_NAME)
74 manifest = self.ydl.urlopen(self._prepare_url(info_dict, man_url)).read()
76 s = manifest.decode('utf-8', 'ignore')
78 if not self.can_download(s, info_dict):
79 if info_dict.get('extra_param_to_segment_url'):
80 self.report_error('pycrypto not found. Please install it.')
82 return self._delegate_to_ffmpeg(filename, info_dict)
85 for line in s.splitlines():
87 if line and not line.startswith('#'):
92 'total_frags': total_frags,
95 self._prepare_and_start_frag_download(ctx)
97 fragment_retries = self.params.get('fragment_retries', 0)
98 skip_unavailable_fragments = self.params.get('skip_unavailable_fragments', True)
99 test = self.params.get('test', False)
102 extra_param_to_segment_url = info_dict.get('extra_param_to_segment_url')
103 if extra_param_to_segment_url:
104 extra_query = compat_urlparse.parse_qs(extra_param_to_segment_url)
107 decrypt_info = {'METHOD': 'NONE'}
109 for line in s.splitlines():
112 if not line.startswith('#'):
115 if re.match(r'^https?://', line)
116 else compat_urlparse.urljoin(man_url, line))
117 frag_name = 'Frag%d' % i
118 frag_filename = '%s-%s' % (ctx['tmpfilename'], frag_name)
120 frag_url = update_url_query(frag_url, extra_query)
122 while count <= fragment_retries:
124 success = ctx['dl'].download(frag_filename, {
126 'http_headers': info_dict.get('http_headers'),
130 down, frag_sanitized = sanitize_open(frag_filename, 'rb')
131 frag_content = down.read()
134 except compat_urllib_error.HTTPError as err:
135 # Unavailable (possibly temporary) fragments may be served.
136 # First we try to retry then either skip or abort.
137 # See https://github.com/rg3/youtube-dl/issues/10165,
138 # https://github.com/rg3/youtube-dl/issues/10448).
140 if count <= fragment_retries:
141 self.report_retry_fragment(err, frag_name, count, fragment_retries)
142 if count > fragment_retries:
143 if skip_unavailable_fragments:
146 self.report_skip_fragment(frag_name)
149 'giving up after %s fragment retries' % fragment_retries)
151 if decrypt_info['METHOD'] == 'AES-128':
152 iv = decrypt_info.get('IV') or compat_struct_pack('>8xq', media_sequence)
153 frag_content = AES.new(
154 decrypt_info['KEY'], AES.MODE_CBC, iv).decrypt(frag_content)
155 ctx['dest_stream'].write(frag_content)
156 frags_filenames.append(frag_sanitized)
157 # We only download the first fragment during the test
162 elif line.startswith('#EXT-X-KEY'):
163 decrypt_info = parse_m3u8_attributes(line[11:])
164 if decrypt_info['METHOD'] == 'AES-128':
165 if 'IV' in decrypt_info:
166 decrypt_info['IV'] = binascii.unhexlify(decrypt_info['IV'][2:].zfill(32))
167 if not re.match(r'^https?://', decrypt_info['URI']):
168 decrypt_info['URI'] = compat_urlparse.urljoin(
169 man_url, decrypt_info['URI'])
171 decrypt_info['URI'] = update_url_query(decrypt_info['URI'], extra_query)
172 decrypt_info['KEY'] = self.ydl.urlopen(decrypt_info['URI']).read()
173 elif line.startswith('#EXT-X-MEDIA-SEQUENCE'):
174 media_sequence = int(line[22:])
176 self._finish_frag_download(ctx)
178 for frag_file in frags_filenames:
179 os.remove(encodeFilename(frag_file))