On Tue, Aug 23, 2016 at 07:37:58PM +1000, Nicolas Sampson wrote: > ffmpeg -i "xxx.zzz" -c:v lib264 -framerate 25 -crf 21 -c:a libmp3lame -b:a > 190k -b:v 3000k -filter:a "volume=2" "xxx.zzz" well, since nobody has mentioned, but aren't -crf and -b:v mutu- ally exclusive? if you want crf then drop the -b:v switch.