Início / computer / Perguntas / 1757213
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mbmast
Asked: 2022-12-11 18:12:51 +0800 CST

Como especificar várias chaves de tag de metadados do especificador de stream ffmpeg?

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Como faço para especificar várias chaves de tag de metadados do especificador de stream?

Por exemplo, isso copia o vídeo da entrada para a saída e seleciona apenas as faixas de áudio que estão em inglês (são duas, uma é Mono e a outra é Stereo):

ffmpeg -i "s1950e15 What's up Doc.mkv" -map 0:a:m:language:eng -map 0:v -c:v copy test.mkv

Da mesma forma, isso copia o vídeo do intut para a saída e seleciona apenas as faixas de áudio que são Mono (existem duas, uma em inglês e outra em francês):

ffmpeg -i "s1950e15 What's up Doc.mkv" -map 0:a:m:title:Mono -map 0:v -c:v copy test.mkv

Mas como seleciono a faixa de áudio em inglês e mono?

Isso é o que eu quero fazer, se fosse válido (não é):

ffmpeg -i "s1950e15 What's up Doc.mkv" -map 0:a:m:language:eng:m:title:Mono -map 0:v -c:v copy test.mkv

Eu tentei as combinações acima e várias, nenhuma das quais funcionou.

Aqui está a saída do ffmpeg:

Input #0, matroska,webm, from 's1950e15 What's up Doc.mkv':
  Metadata:
    encoder         : libmakemkv v1.16.7 (1.3.10/1.5.2) win(x64-release)
    creation_time   : 2022-05-05T00:52:29.000000Z
  Duration: 00:07:15.80, start: 0.000000, bitrate: 3853 kb/s
  Stream #0:0(eng): Video: mpeg2video (Main), yuv420p(tv, progressive), 720x480 [SAR 8:9 DAR 4:3], 29.97 fps, 29.97 tbr, 1k tbn
    Metadata:
      BPS-eng         : 3070452
      DURATION-eng    : 00:07:15.802033333
      NUMBER_OF_FRAMES-eng: 10449
      NUMBER_OF_BYTES-eng: 167263690
      SOURCE_ID-eng   : 0100E0
      _STATISTICS_WRITING_APP-eng: MakeMKV v1.16.7 win(x64-release)
      _STATISTICS_WRITING_DATE_UTC-eng: 2022-05-05 00:52:29
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES SOURCE_ID
    Side data:
      cpb: bitrate max/min/avg: 7500000/0/0 buffer size: 1835008 vbv_delay: N/A
  Stream #0:1(eng): Audio: ac3, 48000 Hz, mono, fltp, 192 kb/s (default)
    Metadata:
      title           : Mono
      BPS-eng         : 192000
      DURATION-eng    : 00:07:15.776000000
      NUMBER_OF_FRAMES-eng: 13618
      NUMBER_OF_BYTES-eng: 10458624
      SOURCE_ID-eng   : 0180BD
      _STATISTICS_WRITING_APP-eng: MakeMKV v1.16.7 win(x64-release)
      _STATISTICS_WRITING_DATE_UTC-eng: 2022-05-05 00:52:29
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES SOURCE_ID
  Stream #0:2(fre): Audio: ac3, 48000 Hz, mono, fltp, 192 kb/s
    Metadata:
      title           : Mono
      BPS-eng         : 192000
      DURATION-eng    : 00:07:15.776000000
      NUMBER_OF_FRAMES-eng: 13618
      NUMBER_OF_BYTES-eng: 10458624
      SOURCE_ID-eng   : 0181BD
      _STATISTICS_WRITING_APP-eng: MakeMKV v1.16.7 win(x64-release)
      _STATISTICS_WRITING_DATE_UTC-eng: 2022-05-05 00:52:29
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES SOURCE_ID
  Stream #0:3(eng): Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
    Metadata:
      title           : Stereo
      BPS-eng         : 192000
      DURATION-eng    : 00:07:15.776000000
      NUMBER_OF_FRAMES-eng: 13618
      NUMBER_OF_BYTES-eng: 10458624
      SOURCE_ID-eng   : 0183BD
      _STATISTICS_WRITING_APP-eng: MakeMKV v1.16.7 win(x64-release)
      _STATISTICS_WRITING_DATE_UTC-eng: 2022-05-05 00:52:29
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES SOURCE_ID
  Stream #0:4(eng): Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
    Metadata:
      title           : Stereo
      BPS-eng         : 192000
      DURATION-eng    : 00:07:15.776000000
      NUMBER_OF_FRAMES-eng: 13618
      NUMBER_OF_BYTES-eng: 10458624
      SOURCE_ID-eng   : 0185BD
      _STATISTICS_WRITING_APP-eng: MakeMKV v1.16.7 win(x64-release)
      _STATISTICS_WRITING_DATE_UTC-eng: 2022-05-05 00:52:29
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES SOURCE_ID
  Stream #0:5(eng): Subtitle: dvd_subtitle, 720x480 (default)
    Metadata:
      BPS-eng         : 2609
      DURATION-eng    : 00:06:17.441033333
      NUMBER_OF_FRAMES-eng: 58
      NUMBER_OF_BYTES-eng: 123096
      SOURCE_ID-eng   : 0120BD
      _STATISTICS_WRITING_APP-eng: MakeMKV v1.16.7 win(x64-release)
      _STATISTICS_WRITING_DATE_UTC-eng: 2022-05-05 00:52:29
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES SOURCE_ID
  Stream #0:6(fre): Subtitle: dvd_subtitle, 720x480
    Metadata:
      BPS-eng         : 2755
      DURATION-eng    : 00:06:55.912800000
      NUMBER_OF_FRAMES-eng: 62
      NUMBER_OF_BYTES-eng: 143280
      SOURCE_ID-eng   : 0121BD
      _STATISTICS_WRITING_APP-eng: MakeMKV v1.16.7 win(x64-release)
      _STATISTICS_WRITING_DATE_UTC-eng: 2022-05-05 00:52:29
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES SOURCE_ID
  Stream #0:7(spa): Subtitle: dvd_subtitle, 720x480
    Metadata:
      BPS-eng         : 2704
      DURATION-eng    : 00:06:55.912800000
      NUMBER_OF_FRAMES-eng: 64
      NUMBER_OF_BYTES-eng: 140580
      SOURCE_ID-eng   : 0122BD
      _STATISTICS_WRITING_APP-eng: MakeMKV v1.16.7 win(x64-release)
      _STATISTICS_WRITING_DATE_UTC-eng: 2022-05-05 00:52:29
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES SOURCE_ID
  Stream #0:8(eng): Subtitle: subrip
    Metadata:
      BPS-eng         : 150
      DURATION-eng    : 00:06:30.488000000
      NUMBER_OF_FRAMES-eng: 129
      NUMBER_OF_BYTES-eng: 7356
      SOURCE_ID-eng   : 0100E0
      _STATISTICS_WRITING_APP-eng: MakeMKV v1.16.7 win(x64-release)
      _STATISTICS_WRITING_DATE_UTC-eng: 2022-05-05 00:52:29
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES SOURCE_ID
ffmpeg

1 respostas

  1. Best Answer

    No momento, o ffmpeg verifica apenas o primeiro valor de metadados especificado. Vou colocar isso no meu ToDo para permitir mais chaves.

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