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[extractor/common] Expose fragments interface for dashsegments formats
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Sergey M․
parent
a0d5077c8d
commit
b4c1d6e800
1 changed files with 99 additions and 43 deletions
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@ -1551,42 +1551,52 @@ def is_drm_protected(element):
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def extract_multisegment_info(element, ms_parent_info):
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ms_info = ms_parent_info.copy()
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# As per [1, 5.3.9.2.2] SegmentList and SegmentTemplate share some
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# common attributes and elements. We will only extract relevant
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# for us.
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def extract_common(source):
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segment_timeline = source.find(_add_ns('SegmentTimeline'))
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if segment_timeline is not None:
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s_e = segment_timeline.findall(_add_ns('S'))
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if s_e:
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ms_info['total_number'] = 0
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ms_info['s'] = []
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for s in s_e:
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r = int(s.get('r', 0))
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ms_info['total_number'] += 1 + r
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ms_info['s'].append({
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't': int(s.get('t', 0)),
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# @d is mandatory (see [1, 5.3.9.6.2, Table 17, page 60])
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'd': int(s.attrib['d']),
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'r': r,
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})
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start_number = source.get('startNumber')
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if start_number:
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ms_info['start_number'] = int(start_number)
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timescale = source.get('timescale')
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if timescale:
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ms_info['timescale'] = int(timescale)
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segment_duration = source.get('duration')
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if segment_duration:
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ms_info['segment_duration'] = int(segment_duration)
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def extract_Initialization(source):
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initialization = source.find(_add_ns('Initialization'))
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if initialization is not None:
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ms_info['initialization_url'] = initialization.attrib['sourceURL']
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segment_list = element.find(_add_ns('SegmentList'))
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if segment_list is not None:
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extract_common(segment_list)
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extract_Initialization(segment_list)
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segment_urls_e = segment_list.findall(_add_ns('SegmentURL'))
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if segment_urls_e:
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ms_info['segment_urls'] = [segment.attrib['media'] for segment in segment_urls_e]
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initialization = segment_list.find(_add_ns('Initialization'))
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if initialization is not None:
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ms_info['initialization_url'] = initialization.attrib['sourceURL']
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else:
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segment_template = element.find(_add_ns('SegmentTemplate'))
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if segment_template is not None:
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start_number = segment_template.get('startNumber')
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if start_number:
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ms_info['start_number'] = int(start_number)
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segment_timeline = segment_template.find(_add_ns('SegmentTimeline'))
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if segment_timeline is not None:
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s_e = segment_timeline.findall(_add_ns('S'))
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if s_e:
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ms_info['total_number'] = 0
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ms_info['s'] = []
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for s in s_e:
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r = int(s.get('r', 0))
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ms_info['total_number'] += 1 + r
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ms_info['s'].append({
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't': int(s.get('t', 0)),
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# @d is mandatory (see [1, 5.3.9.6.2, Table 17, page 60])
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'd': int(s.attrib['d']),
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'r': r,
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})
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else:
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timescale = segment_template.get('timescale')
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if timescale:
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ms_info['timescale'] = int(timescale)
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segment_duration = segment_template.get('duration')
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if segment_duration:
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ms_info['segment_duration'] = int(segment_duration)
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extract_common(segment_template)
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media_template = segment_template.get('media')
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if media_template:
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ms_info['media_template'] = media_template
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@ -1594,11 +1604,14 @@ def extract_multisegment_info(element, ms_parent_info):
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if initialization:
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ms_info['initialization_url'] = initialization
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else:
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initialization = segment_template.find(_add_ns('Initialization'))
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if initialization is not None:
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ms_info['initialization_url'] = initialization.attrib['sourceURL']
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extract_Initialization(segment_template)
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return ms_info
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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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mpd_duration = parse_duration(mpd_doc.get('mediaPresentationDuration'))
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formats = []
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for period in mpd_doc.findall(_add_ns('Period')):
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@ -1655,9 +1668,7 @@ def extract_multisegment_info(element, ms_parent_info):
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}
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representation_ms_info = extract_multisegment_info(representation, adaption_set_ms_info)
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if 'segment_urls' not in representation_ms_info and 'media_template' in representation_ms_info:
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if 'total_number' not in representation_ms_info and 'segment_duration':
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segment_duration = float(representation_ms_info['segment_duration']) / float(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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media_template = representation_ms_info['media_template']
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media_template = media_template.replace('$RepresentationID$', representation_id)
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media_template = re.sub(r'\$(Number|Bandwidth|Time)\$', r'%(\1)d', media_template)
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@ -1666,7 +1677,11 @@ def extract_multisegment_info(element, ms_parent_info):
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# As per [1, 5.3.9.4.4, Table 16, page 55] $Number$ and $Time$
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# can't be used at the same time
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if '%(Number' in media_template:
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if '%(Number' in media_template and 's' not in representation_ms_info:
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segment_duration = None
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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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@ -1675,28 +1690,65 @@ def extract_multisegment_info(element, ms_parent_info):
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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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'Bandwidth': representation_attrib.get('bandwidth'),
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},
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'duration': segment_duration,
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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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else:
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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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segment_number = representation_ms_info['start_number']
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def add_segment_url():
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representation_ms_info['segment_urls'].append(
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media_template % {
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'Time': segment_time,
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'Bandwidth': representation_attrib.get('bandwidth'),
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}
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)
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segment_url = media_template % {
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'Time': segment_time,
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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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})
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for num, s in enumerate(representation_ms_info['s']):
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segment_time = s.get('t') or segment_time
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segment_d = s['d']
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add_segment_url()
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segment_number += 1
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for r in range(s.get('r', 0)):
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segment_time += s['d']
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segment_time += segment_d
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add_segment_url()
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segment_time += s['d']
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segment_number += 1
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segment_time += segment_d
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elif 'segment_urls' in representation_ms_info and 's' in representation_ms_info:
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# No media template
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# Example: https://www.youtube.com/watch?v=iXZV5uAYMJI
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# or any YouTube dashsegments video
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fragments = []
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s_num = 0
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for segment_url in representation_ms_info['segment_urls']:
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s = representation_ms_info['s'][s_num]
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for r in range(s.get('r', 0) + 1):
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fragments.append({
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'url': segment_url,
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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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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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@ -1706,6 +1758,10 @@ def add_segment_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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f['fragments'].extend(representation_ms_info['fragments'])
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for fragment in f['fragments']:
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fragment['url'] = combine_url(base_url, fragment['url'])
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try:
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existing_format = next(
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fo for fo in formats
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