Dynamic audio normalization:
ffmpeg -i input.mkv -c:v copy -c:a pcm_s16le -af "dynaudnorm=f=120:g=3:m=60" output.mkv
Docs: http://underpop.online.fr/f/ffmpeg/help/dynaudnorm.htm.gz
Dynamic audio normalization:
ffmpeg -i input.mkv -c:v copy -c:a pcm_s16le -af "dynaudnorm=f=120:g=3:m=60" output.mkv
Docs: http://underpop.online.fr/f/ffmpeg/help/dynaudnorm.htm.gz