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[youtube] fix chapter extraction fallback
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@ -1753,22 +1753,25 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
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continue
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def chapter_time(mmlir):
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return parse_duration(mmlir.get(
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get_text(mmlir.get('timeDescription'))))
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return parse_duration(
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get_text(mmlir.get('timeDescription')))
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chapters = []
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for next_num, content in enumerate(contents, start=1):
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mmlir = content.get('macroMarkersListItemRenderer') or {}
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start_time = chapter_time(mmlir)
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end_time = chapter_time(try_get(
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contents, lambda x: x[next_num]['macroMarkersListItemRenderer'])) \
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if next_num < len(contents) else duration
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if not (start_time and end_time):
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if start_time is None or end_time is None:
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continue
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chapters.append({
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'start_time': start_time,
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'end_time': end_time,
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'title': get_text(mmlir.get('title')),
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})
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if chapters:
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break
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if chapters:
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info['chapters'] = chapters
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