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https://github.com/ytdl-org/youtube-dl
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Refactor fragments interface and dash segments downloader
- Eliminate segment_urls and initialization_url + Introduce manifest_url (manifest may contain unfragmented data in this case url will be used for direct media URL and manifest_url for manifest itself correspondingly) * Rewrite dashsegments downloader to use fragments data * Improve generic mpd extraction
This commit is contained in:
Sergey M․
parent
21d21b0c72
commit
86f4d14f81
@ -1,7 +1,6 @@
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from __future__ import unicode_literals
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import os
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import re
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from .fragment import FragmentFD
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from ..compat import compat_urllib_error
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@ -19,34 +18,32 @@ class DashSegmentsFD(FragmentFD):
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FD_NAME = 'dashsegments'
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def real_download(self, filename, info_dict):
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base_url = info_dict['url']
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segment_urls = [info_dict['segment_urls'][0]] if self.params.get('test', False) else info_dict['segment_urls']
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initialization_url = info_dict.get('initialization_url')
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segments = info_dict['fragments'][:1] if self.params.get(
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'test', False) else info_dict['fragments']
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ctx = {
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'filename': filename,
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'total_frags': len(segment_urls) + (1 if initialization_url else 0),
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'total_frags': len(segments),
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}
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self._prepare_and_start_frag_download(ctx)
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def combine_url(base_url, target_url):
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if re.match(r'^https?://', target_url):
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return target_url
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return '%s%s%s' % (base_url, '' if base_url.endswith('/') else '/', target_url)
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segments_filenames = []
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fragment_retries = self.params.get('fragment_retries', 0)
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skip_unavailable_fragments = self.params.get('skip_unavailable_fragments', True)
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def process_segment(segment, tmp_filename, fatal):
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target_url, segment_name = segment
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def process_segment(segment, tmp_filename, num):
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segment_url = segment['url']
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segment_name = 'Frag%d' % num
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target_filename = '%s-%s' % (tmp_filename, segment_name)
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# In DASH, the first segment contains necessary headers to
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# generate a valid MP4 file, so always abort for the first segment
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fatal = num == 0 or not skip_unavailable_fragments
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count = 0
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while count <= fragment_retries:
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try:
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success = ctx['dl'].download(target_filename, {'url': combine_url(base_url, target_url)})
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success = ctx['dl'].download(target_filename, {'url': segment_url})
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if not success:
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return False
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down, target_sanitized = sanitize_open(target_filename, 'rb')
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@ -72,16 +69,8 @@ class DashSegmentsFD(FragmentFD):
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return False
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return True
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segments_to_download = [(initialization_url, 'Init')] if initialization_url else []
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segments_to_download.extend([
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(segment_url, 'Seg%d' % i)
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for i, segment_url in enumerate(segment_urls)])
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for i, segment in enumerate(segments_to_download):
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# In DASH, the first segment contains necessary headers to
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# generate a valid MP4 file, so always abort for the first segment
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fatal = i == 0 or not skip_unavailable_fragments
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if not process_segment(segment, ctx['tmpfilename'], fatal):
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for i, segment in enumerate(segments):
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if not process_segment(segment, ctx['tmpfilename'], i):
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return False
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self._finish_frag_download(ctx)
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@ -86,9 +86,10 @@ class InfoExtractor(object):
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from worst to best quality.
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Potential fields:
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* url Mandatory. The URL of the video file or URL of
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the manifest file in case of fragmented media
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(DASH, hls, hds).
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* url Mandatory. The URL of the video file
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* manifest_url
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The URL of the manifest file in case of
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fragmented media (DASH, hls, hds)
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* ext Will be calculated from URL if missing
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* format A human-readable description of the format
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("mp4 container with h264/opus").
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@ -1528,9 +1529,10 @@ class InfoExtractor(object):
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mpd_base_url = re.match(r'https?://.+/', urlh.geturl()).group()
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return self._parse_mpd_formats(
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compat_etree_fromstring(mpd.encode('utf-8')), mpd_id, mpd_base_url, formats_dict=formats_dict)
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compat_etree_fromstring(mpd.encode('utf-8')), mpd_id, mpd_base_url,
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formats_dict=formats_dict, mpd_url=mpd_url)
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def _parse_mpd_formats(self, mpd_doc, mpd_id=None, mpd_base_url='', formats_dict={}):
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def _parse_mpd_formats(self, mpd_doc, mpd_id=None, mpd_base_url='', formats_dict={}, mpd_url=None):
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"""
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Parse formats from MPD manifest.
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References:
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@ -1654,6 +1656,7 @@ class InfoExtractor(object):
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f = {
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'format_id': '%s-%s' % (mpd_id, representation_id) if mpd_id else representation_id,
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'url': base_url,
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'manifest_url': mpd_url,
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'ext': mimetype2ext(mime_type),
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'width': int_or_none(representation_attrib.get('width')),
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'height': int_or_none(representation_attrib.get('height')),
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@ -1682,14 +1685,6 @@ class InfoExtractor(object):
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if 'total_number' not in representation_ms_info and 'segment_duration':
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segment_duration = float_or_none(representation_ms_info['segment_duration'], representation_ms_info['timescale'])
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representation_ms_info['total_number'] = int(math.ceil(float(period_duration) / segment_duration))
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representation_ms_info['segment_urls'] = [
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media_template % {
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'Number': segment_number,
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'Bandwidth': representation_attrib.get('bandwidth'),
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}
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for segment_number in range(
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representation_ms_info['start_number'],
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representation_ms_info['total_number'] + representation_ms_info['start_number'])]
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representation_ms_info['fragments'] = [{
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'url': media_template % {
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'Number': segment_number,
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@ -1703,7 +1698,6 @@ class InfoExtractor(object):
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# $Number*$ or $Time$ in media template with S list available
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# Example $Number*$: http://www.svtplay.se/klipp/9023742/stopptid-om-bjorn-borg
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# Example $Time$: https://play.arkena.com/embed/avp/v2/player/media/b41dda37-d8e7-4d3f-b1b5-9a9db578bdfe/1/129411
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representation_ms_info['segment_urls'] = []
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representation_ms_info['fragments'] = []
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segment_time = 0
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segment_d = None
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@ -1715,7 +1709,6 @@ class InfoExtractor(object):
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'Bandwidth': representation_attrib.get('bandwidth'),
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'Number': segment_number,
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}
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representation_ms_info['segment_urls'].append(segment_url)
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representation_ms_info['fragments'].append({
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'url': segment_url,
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'duration': float_or_none(segment_d, representation_ms_info['timescale']),
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@ -1745,17 +1738,15 @@ class InfoExtractor(object):
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'duration': float_or_none(s['d'], representation_ms_info['timescale']),
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})
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representation_ms_info['fragments'] = fragments
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if 'segment_urls' in representation_ms_info:
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# NB: MPD manifest may contain direct URLs to unfragmented media.
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# No fragments key is present in this case.
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if 'fragments' in representation_ms_info:
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f.update({
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'segment_urls': representation_ms_info['segment_urls'],
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'fragments': [],
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'protocol': 'http_dash_segments',
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})
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if 'initialization_url' in representation_ms_info:
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initialization_url = representation_ms_info['initialization_url'].replace('$RepresentationID$', representation_id)
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f.update({
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'initialization_url': initialization_url,
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})
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if not f.get('url'):
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f['url'] = initialization_url
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f['fragments'].append({'url': initialization_url})
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@ -1657,7 +1657,9 @@ class GenericIE(InfoExtractor):
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return self.playlist_result(self._parse_xspf(doc, video_id), video_id)
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elif re.match(r'(?i)^(?:{[^}]+})?MPD$', doc.tag):
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info_dict['formats'] = self._parse_mpd_formats(
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doc, video_id, mpd_base_url=url.rpartition('/')[0])
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doc, video_id,
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mpd_base_url=full_response.geturl().rpartition('/')[0],
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mpd_url=url)
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self._sort_formats(info_dict['formats'])
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return info_dict
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elif re.match(r'^{http://ns\.adobe\.com/f4m/[12]\.0}manifest$', doc.tag):
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