[FFmpeg-user] request for review: feature request of "disallow unallowed bitrates"

[Roger Pack]

> ffmpeg -i foo.wav -c:a libvo_amrwbenc -b:a 48k -ar 16k -ac 1 output.amr
> ...
> bitrate not supported: use one of 6.60k, 8.85k, 12.65k, 14.25k, 15.85k, 18.25k, 19.85k, 23.05k, 23.85k, using 23.85k

So it actually fails in this case? (if so then maybe libmp3lame should
as well? I'd be down with that...)