[downloader/hls] add basic support for EXT-X-BYTERANGE tag(#10955)
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1 changed files with 16 additions and 3 deletions
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@ -34,7 +34,7 @@ class HlsFD(FragmentFD):
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def can_download(manifest, info_dict):
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UNSUPPORTED_FEATURES = (
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r'#EXT-X-KEY:METHOD=(?!NONE|AES-128)', # encrypted streams [1]
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r'#EXT-X-BYTERANGE', # playlists composed of byte ranges of media files [2]
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# r'#EXT-X-BYTERANGE', # playlists composed of byte ranges of media files [2]
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# Live streams heuristic does not always work (e.g. geo restricted to Germany
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# 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)
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@ -52,7 +52,9 @@ class HlsFD(FragmentFD):
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# 4. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.3.5
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)
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check_results = [not re.search(feature, manifest) for feature in UNSUPPORTED_FEATURES]
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check_results.append(can_decrypt_frag or '#EXT-X-KEY:METHOD=AES-128' not in manifest)
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is_aes128_enc = '#EXT-X-KEY:METHOD=AES-128' in manifest
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check_results.append(can_decrypt_frag or not is_aes128_enc)
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check_results.append(not (is_aes128_enc and r'#EXT-X-BYTERANGE' in manifest))
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check_results.append(not info_dict.get('is_live'))
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return all(check_results)
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@ -100,6 +102,7 @@ class HlsFD(FragmentFD):
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i = 0
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media_sequence = 0
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decrypt_info = {'METHOD': 'NONE'}
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byte_range = {}
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frags_filenames = []
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for line in s.splitlines():
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line = line.strip()
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@ -114,11 +117,14 @@ class HlsFD(FragmentFD):
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if extra_query:
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frag_url = update_url_query(frag_url, extra_query)
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count = 0
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headers = info_dict.get('http_headers', {})
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if byte_range:
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headers['Range'] = 'bytes=%d-%d' % (byte_range['start'], byte_range['end'])
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while count <= fragment_retries:
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try:
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success = ctx['dl'].download(frag_filename, {
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'url': frag_url,
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'http_headers': info_dict.get('http_headers'),
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'http_headers': headers,
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})
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if not success:
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return False
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@ -167,6 +173,13 @@ class HlsFD(FragmentFD):
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decrypt_info['KEY'] = self.ydl.urlopen(decrypt_info['URI']).read()
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elif line.startswith('#EXT-X-MEDIA-SEQUENCE'):
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media_sequence = int(line[22:])
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elif line.startswith('#EXT-X-BYTERANGE'):
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splitted_byte_range = line[17:].split('@')
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sub_range_start = int(splitted_byte_range[1]) if len(splitted_byte_range) == 2 else byte_range['end']
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byte_range = {
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'start': sub_range_start,
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'end': sub_range_start + int(splitted_byte_range[0]),
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}
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self._finish_frag_download(ctx)
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