ffmpeg:从mp3中移除lame replaygain标签

Question

如果未设置选项--noreplaygain，lame将写入replaygain标记：

ffmpeg -i testgain_0.mp3
Input #0, mp3, from 'testgain_0.mp3':
Duration: 00:01:00.42, start: 0.025057, bitrate: 192 kb/s
Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 192 kb/s
Metadata:
  encoder         : LAME3.99r
Side data:
  replaygain: track gain - -12.500000, track peak - unknown, album gain - unknown, album peak - unknown, 

我可以使用ffmpeg来删除"Side data“吗？在我的map metadata尝试中，我不能访问这个“辅助数据”来删除它：-map 0:0 -map_metadata -1

Answer 1

如果您通过MP4往返它，它似乎会被删除。

ffmpeg -i testgain_0.mp3 -c copy testgain_0.mp4

ffmpeg -i testgain_0.mp4 -c copy nogain_0.mp3

或者对单步方法使用管道：

ffmpeg -i testgain_0.mp3 -c copy -f avi - | ffmpeg -i - -c copy nogain_0.mp3