On 04.03.21 22:56, Peter White wrote: > Something like this: > ffmpeg -f lavfi -i ffmpeg -f lavfi -i > color=size=960x720:rate=60:color=black -c libvpx-vp9 -t 50 offset.ts Sorry, there is a mistake here. This is what I actually meant: ffmpeg -f lavfi -i color=size=960x720:rate=60:color=black -c libvpx-vp9 -t 50 offset.ts