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 """
34 def can_download(manifest, info_dict):
35 UNSUPPORTED_FEATURES = (
36 r'#EXT-X-KEY:METHOD=(?!NONE|AES-128)', # encrypted streams [1]
37 # r'#EXT-X-BYTERANGE', # playlists composed of byte ranges of media files [2]
39 # Live streams heuristic does not always work (e.g. geo restricted to Germany
40 # 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)
41 # r'#EXT-X-MEDIA-SEQUENCE:(?!0$)', # live streams [3]
43 # This heuristic also is not correct since segments may not be appended as well.
44 # Twitch vods of finished streams have EXT-X-PLAYLIST-TYPE:EVENT despite
45 # no segments will definitely be appended to the end of the playlist.
46 # r'#EXT-X-PLAYLIST-TYPE:EVENT', # media segments may be appended to the end of
47 # # event media playlists [4]
49 # 1. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.2.4
50 # 2. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.2.2
51 # 3. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.3.2
52 # 4. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.3.5
54 check_results = [not re.search(feature, manifest) for feature in UNSUPPORTED_FEATURES]
55 is_aes128_enc = '#EXT-X-KEY:METHOD=AES-128' in manifest
56 check_results.append(can_decrypt_frag or not is_aes128_enc)
57 check_results.append(not (is_aes128_enc and r'#EXT-X-BYTERANGE' in manifest))
58 check_results.append(not info_dict.get('is_live'))
59 return all(check_results)
61 def real_download(self, filename, info_dict):
62 man_url = info_dict['url']
63 self.to_screen('[%s] Downloading m3u8 manifest' % self.FD_NAME)
65 manifest = self.ydl.urlopen(self._prepare_url(info_dict, man_url)).read()
67 s = manifest.decode('utf-8', 'ignore')
69 if not self.can_download(s, info_dict):
70 if info_dict.get('extra_param_to_segment_url'):
71 self.report_error('pycrypto not found. Please install it.')
74 'hlsnative has detected features it does not support, '
75 'extraction will be delegated to ffmpeg')
76 fd = FFmpegFD(self.ydl, self.params)
77 for ph in self._progress_hooks:
78 fd.add_progress_hook(ph)
79 return fd.real_download(filename, info_dict)
82 for line in s.splitlines():
84 if line and not line.startswith('#'):
89 'total_frags': total_frags,
92 self._prepare_and_start_frag_download(ctx)
94 fragment_retries = self.params.get('fragment_retries', 0)
95 skip_unavailable_fragments = self.params.get('skip_unavailable_fragments', True)
96 test = self.params.get('test', False)
99 extra_param_to_segment_url = info_dict.get('extra_param_to_segment_url')
100 if extra_param_to_segment_url:
101 extra_query = compat_urlparse.parse_qs(extra_param_to_segment_url)
104 decrypt_info = {'METHOD': 'NONE'}
107 for line in s.splitlines():
110 if not line.startswith('#'):
113 if re.match(r'^https?://', line)
114 else compat_urlparse.urljoin(man_url, line))
115 frag_name = 'Frag%d' % i
116 frag_filename = '%s-%s' % (ctx['tmpfilename'], frag_name)
118 frag_url = update_url_query(frag_url, extra_query)
120 headers = info_dict.get('http_headers', {})
122 headers['Range'] = 'bytes=%d-%d' % (byte_range['start'], byte_range['end'])
123 while count <= fragment_retries:
125 success = ctx['dl'].download(frag_filename, {
127 'http_headers': headers,
131 down, frag_sanitized = sanitize_open(frag_filename, 'rb')
132 frag_content = down.read()
135 except compat_urllib_error.HTTPError as err:
136 # Unavailable (possibly temporary) fragments may be served.
137 # First we try to retry then either skip or abort.
138 # See https://github.com/rg3/youtube-dl/issues/10165,
139 # https://github.com/rg3/youtube-dl/issues/10448).
141 if count <= fragment_retries:
142 self.report_retry_fragment(err, frag_name, count, fragment_retries)
143 if count > fragment_retries:
144 if skip_unavailable_fragments:
147 self.report_skip_fragment(frag_name)
150 'giving up after %s fragment retries' % fragment_retries)
152 if decrypt_info['METHOD'] == 'AES-128':
153 iv = decrypt_info.get('IV') or compat_struct_pack('>8xq', media_sequence)
154 frag_content = AES.new(
155 decrypt_info['KEY'], AES.MODE_CBC, iv).decrypt(frag_content)
156 ctx['dest_stream'].write(frag_content)
157 frags_filenames.append(frag_sanitized)
158 # We only download the first fragment during the test
163 elif line.startswith('#EXT-X-KEY'):
164 decrypt_info = parse_m3u8_attributes(line[11:])
165 if decrypt_info['METHOD'] == 'AES-128':
166 if 'IV' in decrypt_info:
167 decrypt_info['IV'] = binascii.unhexlify(decrypt_info['IV'][2:].zfill(32))
168 if not re.match(r'^https?://', decrypt_info['URI']):
169 decrypt_info['URI'] = compat_urlparse.urljoin(
170 man_url, decrypt_info['URI'])
172 decrypt_info['URI'] = update_url_query(decrypt_info['URI'], extra_query)
173 decrypt_info['KEY'] = self.ydl.urlopen(decrypt_info['URI']).read()
174 elif line.startswith('#EXT-X-MEDIA-SEQUENCE'):
175 media_sequence = int(line[22:])
176 elif line.startswith('#EXT-X-BYTERANGE'):
177 splitted_byte_range = line[17:].split('@')
178 sub_range_start = int(splitted_byte_range[1]) if len(splitted_byte_range) == 2 else byte_range['end']
180 'start': sub_range_start,
181 'end': sub_range_start + int(splitted_byte_range[0]),
184 self._finish_frag_download(ctx)
186 for frag_file in frags_filenames:
187 os.remove(encodeFilename(frag_file))