[FFmpeg-user] mpeg2 filesize reduction: reduce video, enhance audio, codec selection

Beeblebrox zaphod at berentweb.com
Wed May 7 17:11:17 CEST 2014

Sorry for the incomplete previous post.
ffmpeg starts if I remove the "volume" flag:
$ ffmpeg -i video1.mpg -c:a libfdk_aac -af
'compand=.3|.3:1|1:-90/-60|-60/-40|-40/-30|-20/-20:6:0:-90:0.2' -c:v
libx264 -preset slow -crf 32 -f mp4 video1-out.mp4)

* How is "volume" combined with "compand"? Or should that not be done and
volume should be increased on a second pass?
* Syntax conversion question (compand 0.1,0.3
-60,-60,-30,-15,-20,-12,-4,-8,-2,-7 -2) still open.

Thanks and Regards.

More information about the ffmpeg-user mailing list