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[extractor] Skip subtitles without URI in m3u8 manifests
Closes #339 Authored by: hheimbuerger
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@ -2042,7 +2042,12 @@ def extract_media(x_media_line):
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groups.setdefault(group_id, []).append(media)
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# <https://tools.ietf.org/html/rfc8216#section-4.3.4.1>
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if media_type == 'SUBTITLES':
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lang = media['LANGUAGE'] # XXX: normalise?
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# According to RFC 8216 §4.3.4.2.1, URI is REQUIRED in the
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# EXT-X-MEDIA tag if the media type is SUBTITLES.
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# However, lack of URI has been spotted in the wild.
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# e.g. NebulaIE; see https://github.com/yt-dlp/yt-dlp/issues/339
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if not media.get('URI'):
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return
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url = format_url(media['URI'])
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sub_info = {
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'url': url,
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@ -2054,6 +2059,7 @@ def extract_media(x_media_line):
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# <https://tools.ietf.org/html/rfc8216#section-3.1>
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sub_info['ext'] = 'vtt'
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sub_info['protocol'] = 'm3u8_native'
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lang = media.get('LANGUAGE') or 'unknown'
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subtitles.setdefault(lang, []).append(sub_info)
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if media_type not in ('VIDEO', 'AUDIO'):
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return
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