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[ie/niconico] rewrite DMS info extraction by splitting transformations

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Mozi 2024-02-27 16:09:41 +00:00
parent 9a986b9cf3
commit ba7950e79b
1 changed files with 26 additions and 32 deletions
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58
yt_dlp/extractor/niconico.py
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@ -446,36 +446,19 @@ class NiconicoIE(InfoExtractor):
if fmt:
formats.append(fmt)
# Getting all audio formats results in extracting duplicate video formats.
# Duplicate ones will be filtered out later.
dms_data = traverse_obj(api_data, ({
'videos': ('media', 'domand', 'videos', ..., {
lambda item: item['id'] if item['isAvailable'] else None
}),
'audios': ('media', 'domand', 'audios', ..., {
lambda item: (item['id'], {
'format_id': str(parse_bitrate(item['id'])),
'abr': float_or_none(item['bitRate'], scale=1000),
'asr': item['samplingRate'],
'acodec': 'aac',
'ext': 'm4a',
}) if item['isAvailable'] else None
}),
'accessRightKey': ('media', 'domand', 'accessRightKey'),
'track_id': ('client', 'watchTrackId'),
}, {
'videos': 'videos',
'audios': ('audios', {lambda items: dict(items)}),
'accessRightKey': 'accessRightKey',
'track_id': 'track_id',
}, {
lambda data: data if all(key in data for key in [
'videos', 'audios', 'accessRightKey', 'track_id',
]) else None
'video_ids': ('media', 'domand', 'videos', lambda _, v: v['isAvailable'], 'id', {str}),
'audio_ids': ('media', 'domand', 'audios', lambda _, v: v['isAvailable'], 'id', {str}),
'accessRightKey': ('media', 'domand', 'accessRightKey', {str}),
'track_id': ('client', 'watchTrackId', {str}),
}))
if dms_data:
if len(dms_data) == 4:
dms_m3u8_url = traverse_obj(self._download_json(
f'https://nvapi.nicovideo.jp/v1/watch/{video_id}/access-rights/hls', video_id,
data=json.dumps({
'outputs': list(itertools.product(dms_data['videos'], dms_data['audios']))
'outputs': list(itertools.product(dms_data['video_ids'], dms_data['audio_ids']))
}).encode(), query={'actionTrackId': dms_data['track_id']}, headers={
'x-access-right-key': dms_data['accessRightKey'],
'x-frontend-id': 6,
@ -485,19 +468,30 @@ class NiconicoIE(InfoExtractor):
dms_fmts = self._extract_m3u8_formats(dms_m3u8_url, video_id)
# update audio formats
dms_audio_fmts = [fmt for fmt in dms_fmts if fmt['vcodec'] == 'none']
for i, fmt in enumerate(dms_audio_fmts):
format_id = remove_end(fmt['format_id'], '-%s' % fmt['format_note'])
dms_audio_fmts[i].update(**(traverse_obj(dms_data, ('audios', format_id, {dict})) or {}))
dms_audio_info = dict(traverse_obj(api_data, (
'media', 'domand', 'audios', lambda _, v: v['isAvailable'], {
lambda item: (item['id'], {
'format_id': str(parse_bitrate(item['id'])),
'abr': float_or_none(item['bitRate'], scale=1000),
'asr': item['samplingRate'],
'acodec': 'aac',
'ext': 'm4a',
})
},
)))
dms_audio_fmts = traverse_obj(dms_fmts, (lambda _, v: v['vcodec'] == 'none', {
lambda fmt: dict(fmt, **traverse_obj(
dms_audio_info, (remove_end(fmt['format_id'], '-%s' % fmt['format_note']), {dict})
))
}))
# remove duplicate video formats
# First, pick out the non-duplicate video format with the minimal tbr.
dms_video_fmts = [
list(fmts)[0] for _, fmts in itertools.groupby(sorted([
fmt for fmt in dms_fmts if fmt['vcodec'] != 'none'
], key=lambda fmt: fmt['tbr']), lambda fmt: fmt['url'])
]
# correct video bitrate
# Then, correct the bitrate of all videos by minusing the minimal audio bitrate.
min_abr = traverse_obj(min(dms_audio_fmts, key=lambda fmt: fmt['abr']), ('abr'), default=0)
for i, fmt in enumerate(dms_video_fmts):
vbr = fmt['tbr'] - min_abr