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add Basic support for Smooth Streaming protocol(#8118)

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Remita Amine 2016-10-19 16:22:40 +01:00 • committed by Sergey M
parent f449c061d0
commit b2758123c5
4 changed files with 377 additions and 1 deletions
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101
youtube_dl/extractor/common.py
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@ -1780,6 +1780,107 @@ class InfoExtractor(object):
self.report_warning('Unknown MIME type %s in DASH manifest' % mime_type)
return formats
def _extract_ism_formats(self, ism_url, video_id, ism_id=None, note=None, errnote=None, fatal=True):
res = self._download_webpage_handle(
ism_url, video_id,
note=note or 'Downloading ISM manifest',
errnote=errnote or 'Failed to download ISM manifest',
fatal=fatal)
if res is False:
return []
ism, urlh = res
return self._parse_ism_formats(
compat_etree_fromstring(ism.encode('utf-8')), urlh.geturl(), ism_id)
def _parse_ism_formats(self, ism_doc, ism_url, ism_id=None):
if ism_doc.get('IsLive') == 'TRUE' or ism_doc.find('Protection') is not None:
return []
ism_base_url = re.match(r'https?://.+/', ism_url).group()
duration = int(ism_doc.attrib['Duration'])
timescale = int_or_none(ism_doc.get('TimeScale')) or 10000000
formats = []
for stream in ism_doc.findall('StreamIndex'):
stream_type = stream.get('Type')
if stream_type not in ('video', 'audio'):
continue
url_pattern = stream.attrib['Url']
stream_timescale = int_or_none(stream.get('TimeScale')) or timescale
stream_name = stream.get('Name')
for track in stream.findall('QualityLevel'):
fourcc = track.get('FourCC')
# TODO: add support for WVC1 and WMAP
if fourcc not in ('H264', 'AVC1', 'AACL'):
self.report_warning('%s is not a supported codec' % fourcc)
continue
tbr = int(track.attrib['Bitrate']) // 1000
width = int_or_none(track.get('MaxWidth'))
height = int_or_none(track.get('MaxHeight'))
sampling_rate = int_or_none(track.get('SamplingRate'))
track_url_pattern = re.sub(r'{[Bb]itrate}', track.attrib['Bitrate'], url_pattern)
track_url_pattern = compat_urlparse.urljoin(ism_url, track_url_pattern)
fragments = []
fragment_ctx = {
'time': 0,
}
stream_fragments = stream.findall('c')
for stream_fragment_index, stream_fragment in enumerate(stream_fragments):
fragment_ctx['time'] = int_or_none(stream_fragment.get('t')) or fragment_ctx['time']
fragment_repeat = int_or_none(stream_fragment.get('r')) or 1
fragment_ctx['duration'] = int_or_none(stream_fragment.get('d'))
if not fragment_ctx['duration']:
try:
next_fragment_time = int(stream_fragment[stream_fragment_index + 1].attrib['t'])
except IndexError:
next_fragment_time = duration
fragment_ctx['duration'] = (next_fragment_time - frgament_time) / fragment_repeat
for _ in range(fragment_repeat):
fragments.append({
'url': re.sub(r'{start[ _]time}', str(fragment_ctx['time']), track_url_pattern),
'duration': fragment_ctx['duration'] / stream_timescale,
})
fragment_ctx['time'] += fragment_ctx['duration']
format_id = []
if ism_id:
format_id.append(ism_id)
if stream_name:
format_id.append(stream_name)
format_id.append(compat_str(tbr))
formats.append({
'format_id': '-'.join(format_id),
'url': ism_url,
'manifest_url': ism_url,
'ext': 'ismv' if stream_type == 'video' else 'isma',
'width': width,
'height': height,
'tbr': tbr,
'asr': sampling_rate,
'vcodec': 'none' if stream_type == 'audio' else fourcc,
'acodec': 'none' if stream_type == 'video' else fourcc,
'protocol': 'ism',
'fragments': fragments,
'_download_params': {
'duration': duration,
'timescale': stream_timescale,
'width': width or 0,
'height': height or 0,
'fourcc': fourcc,
'codec_private_data': track.get('CodecPrivateData'),
'sampling_rate': sampling_rate,
'channels': int_or_none(track.get('Channels', 2)),
'bits_per_sample': int_or_none(track.get('BitsPerSample', 16)),
'nal_unit_length_field': int_or_none(track.get('NALUnitLengthField', 4)),
},
})
return formats
def _parse_html5_media_entries(self, base_url, webpage, video_id, m3u8_id=None, m3u8_entry_protocol='m3u8'):
def absolute_url(video_url):
return compat_urlparse.urljoin(base_url, video_url)