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https://github.com/yt-dlp/yt-dlp.git
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[extractor] Prevent unnecessary download of hls manifests
and refactor `hls_split_discontinuity` code
This commit is contained in:
pukkandan
parent
723d44b92b
commit
60755938b3
@ -1979,24 +1979,33 @@ def _parse_m3u8_formats_and_subtitles(
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preference=None, quality=None, m3u8_id=None, live=False, note=None,
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errnote=None, fatal=True, data=None, headers={}, query={},
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video_id=None):
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formats, subtitles = [], {}
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if '#EXT-X-FAXS-CM:' in m3u8_doc: # Adobe Flash Access
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return [], {}
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return formats, subtitles
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if (not self.get_param('allow_unplayable_formats')
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and re.search(r'#EXT-X-SESSION-KEY:.*?URI="skd://', m3u8_doc)): # Apple FairPlay
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return [], {}
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return formats, subtitles
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formats = []
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def format_url(url):
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return url if re.match(r'^https?://', url) else compat_urlparse.urljoin(m3u8_url, url)
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subtitles = {}
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if self.get_param('hls_split_discontinuity', False):
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def _extract_m3u8_playlist_indices(manifest_url=None, m3u8_doc=None):
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if not m3u8_doc:
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if not manifest_url:
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return []
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m3u8_doc = self._download_webpage(
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manifest_url, video_id, fatal=fatal, data=data, headers=headers,
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note=False, errnote='Failed to download m3u8 playlist information')
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if m3u8_doc is False:
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return []
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return range(1 + sum(line.startswith('#EXT-X-DISCONTINUITY') for line in m3u8_doc.splitlines()))
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format_url = lambda u: (
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u
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if re.match(r'^https?://', u)
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else compat_urlparse.urljoin(m3u8_url, u))
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split_discontinuity = self.get_param('hls_split_discontinuity', False)
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else:
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def _extract_m3u8_playlist_indices(*args, **kwargs):
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return [None]
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# References:
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# 1. https://tools.ietf.org/html/draft-pantos-http-live-streaming-21
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@ -2014,68 +2023,16 @@ def _parse_m3u8_formats_and_subtitles(
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# media playlist and MUST NOT appear in master playlist thus we can
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# clearly detect media playlist with this criterion.
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def _extract_m3u8_playlist_formats(format_url=None, m3u8_doc=None, video_id=None,
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fatal=True, data=None, headers={}):
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if not m3u8_doc:
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if not format_url:
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return []
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res = self._download_webpage_handle(
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format_url, video_id,
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note=False,
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errnote='Failed to download m3u8 playlist information',
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fatal=fatal, data=data, headers=headers)
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if res is False:
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return []
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m3u8_doc, urlh = res
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format_url = urlh.geturl()
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playlist_formats = []
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i = (
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0
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if split_discontinuity
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else None)
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format_info = {
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'index': i,
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'key_data': None,
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'files': [],
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}
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for line in m3u8_doc.splitlines():
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if not line.startswith('#'):
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format_info['files'].append(line)
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elif split_discontinuity and line.startswith('#EXT-X-DISCONTINUITY'):
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i += 1
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playlist_formats.append(format_info)
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format_info = {
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'index': i,
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'url': format_url,
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'files': [],
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}
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playlist_formats.append(format_info)
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return playlist_formats
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if '#EXT-X-TARGETDURATION' in m3u8_doc: # media playlist, return as is
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playlist_formats = _extract_m3u8_playlist_formats(m3u8_doc=m3u8_doc)
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for format in playlist_formats:
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format_id = []
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if m3u8_id:
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format_id.append(m3u8_id)
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format_index = format.get('index')
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if format_index:
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format_id.append(str(format_index))
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f = {
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'format_id': '-'.join(format_id),
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'format_index': format_index,
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'url': m3u8_url,
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'ext': ext,
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'protocol': entry_protocol,
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'preference': preference,
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'quality': quality,
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}
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formats.append(f)
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formats = [{
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'format_id': '-'.join(map(str, filter(None, [m3u8_id, idx]))),
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'format_index': idx,
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'url': m3u8_url,
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'ext': ext,
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'protocol': entry_protocol,
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'preference': preference,
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'quality': quality,
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} for idx in _extract_m3u8_playlist_indices(m3u8_doc=m3u8_doc)]
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return formats, subtitles
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@ -2115,32 +2072,19 @@ def extract_media(x_media_line):
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media_url = media.get('URI')
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if media_url:
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manifest_url = format_url(media_url)
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format_id = []
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playlist_formats = _extract_m3u8_playlist_formats(manifest_url, video_id=video_id,
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fatal=fatal, data=data, headers=headers)
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for format in playlist_formats:
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format_index = format.get('index')
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for v in (m3u8_id, group_id, name):
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if v:
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format_id.append(v)
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if format_index:
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format_id.append(str(format_index))
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f = {
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'format_id': '-'.join(format_id),
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'format_note': name,
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'format_index': format_index,
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'url': manifest_url,
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'manifest_url': m3u8_url,
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'language': media.get('LANGUAGE'),
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'ext': ext,
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'protocol': entry_protocol,
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'preference': preference,
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'quality': quality,
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}
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if media_type == 'AUDIO':
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f['vcodec'] = 'none'
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formats.append(f)
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formats.extend({
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'format_id': '-'.join(map(str, filter(None, (m3u8_id, group_id, name, idx)))),
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'format_note': name,
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'format_index': idx,
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'url': manifest_url,
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'manifest_url': m3u8_url,
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'language': media.get('LANGUAGE'),
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'ext': ext,
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'protocol': entry_protocol,
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'preference': preference,
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'quality': quality,
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'vcodec': 'none' if media_type == 'AUDIO' else None,
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} for idx in _extract_m3u8_playlist_indices(manifest_url))
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def build_stream_name():
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# Despite specification does not mention NAME attribute for
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@ -2179,25 +2123,17 @@ def build_stream_name():
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or last_stream_inf.get('BANDWIDTH'), scale=1000)
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manifest_url = format_url(line.strip())
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playlist_formats = _extract_m3u8_playlist_formats(manifest_url, video_id=video_id,
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fatal=fatal, data=data, headers=headers)
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for frmt in playlist_formats:
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format_id = []
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if m3u8_id:
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format_id.append(m3u8_id)
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format_index = frmt.get('index')
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stream_name = build_stream_name()
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for idx in _extract_m3u8_playlist_indices(manifest_url):
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format_id = [m3u8_id, None, idx]
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# Bandwidth of live streams may differ over time thus making
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# format_id unpredictable. So it's better to keep provided
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# format_id intact.
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if not live:
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format_id.append(stream_name if stream_name else '%d' % (tbr if tbr else len(formats)))
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if format_index:
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format_id.append(str(format_index))
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stream_name = build_stream_name()
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format_id[1] = stream_name if stream_name else '%d' % (tbr if tbr else len(formats))
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f = {
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'format_id': '-'.join(format_id),
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'format_index': format_index,
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'format_id': '-'.join(map(str, filter(None, format_id))),
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'format_index': idx,
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'url': manifest_url,
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'manifest_url': m3u8_url,
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'tbr': tbr,
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