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[ie/youtube] Calculate more accurate filesize
YouTube provides slightly different duration for each format. Calculating file-size based on this duration instead of the video duration gives more accurate results. Ref: https://github.com/yt-dlp/yt-dlp/issues/1400#issuecomment-2007441207
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@ -33,6 +33,7 @@
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clean_html,
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datetime_from_str,
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dict_get,
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filesize_from_tbr,
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filter_dict,
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float_or_none,
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format_field,
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@ -55,6 +56,7 @@
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str_to_int,
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strftime_or_none,
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traverse_obj,
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try_call,
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try_get,
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unescapeHTML,
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unified_strdate,
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@ -3839,11 +3841,12 @@ def build_fragments(f):
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10 if audio_track.get('audioIsDefault') and 10
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else -10 if 'descriptive' in (audio_track.get('displayName') or '').lower() and -10
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else -1)
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format_duration = traverse_obj(fmt, ('approxDurationMs', {lambda x: float_or_none(x, 1000)}))
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# Some formats may have much smaller duration than others (possibly damaged during encoding)
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# E.g. 2-nOtRESiUc Ref: https://github.com/yt-dlp/yt-dlp/issues/2823
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# Make sure to avoid false positives with small duration differences.
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# E.g. __2ABJjxzNo, ySuUZEjARPY
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is_damaged = try_get(fmt, lambda x: float(x['approxDurationMs']) / duration < 500)
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is_damaged = try_call(lambda: format_duration < duration // 2)
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if is_damaged:
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self.report_warning(
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f'{video_id}: Some formats are possibly damaged. They will be deprioritized', only_once=True)
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@ -3873,6 +3876,7 @@ def build_fragments(f):
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'quality': q(quality) - bool(fmt.get('isDrc')) / 2,
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'has_drm': bool(fmt.get('drmFamilies')),
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'tbr': tbr,
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'filesize_approx': filesize_from_tbr(tbr, format_duration),
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'url': fmt_url,
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'width': int_or_none(fmt.get('width')),
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'language': join_nonempty(audio_track.get('id', '').split('.')[0],
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