On 4/19/19, Ulf Zibis <ulf.zi...@cosoco.de> wrote: > > Am 19.04.19 um 14:35 schrieb Paul B Mahol: >>> Do I really need the init function, as it has to do nothing in my case? >> If it does nothing, you can safely remove it. > > Thanks! > >>> For performance testing I use the like: >>> -f rawvideo -pix_fmt gray16 -s 400x600 -i /dev/zero >>> >>> Are there doubts if that is good either? >> Use ffmpeg -f lavfi -i color=color=black:size=400x600 ... >> >> Thing about /dev/zero and -f rawvideo is that it will decode zeroes >> over and over again and thus use more CPU for that. > Thanks again for the hint. For my tests I use different formats: > test[i++]="3-plane 8-bit YUV-420: -pix_fmt yuv420p" > test[i++]="3-plane 16-bit YUV-420: -pix_fmt yuv420p16" > test[i++]="3-plane 16-bit YUV-444: -pix_fmt yuv444p16" > test[i++]="1-plane 8-bit Y-400: -pix_fmt gray" > test[i++]="1-plane 16-bit Y-400: -pix_fmt gray16" > > test[i++]="4-plane 16-bit RGBA-444: -pix_fmt rgba64" > > What could be the expressions with "-f lavfi"?
ffmpeg -f lavfi -i color=...,format=rgba64/gray/gray16... This would use scale filter to convert every frame, but your case is not depending on it. You could also use bench filter. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
