Benutzen
ffmpeg \ -i in1.mp4 -i in2.mp4 \ -filter_complex " \ [0:v]setpts=PTS-STARTPTS, scale=480x360[top]; \ [1:v]setpts=PTS-STARTPTS, scale=480x360, \ format=yuva420p,colorchannelmixer=aa=0.5[bottom]; \ [top][bottom]overlay=shortest=1" \ -acodec libvo_aacenc -vcodec libx264 out.mp4
Stellen Sie aa
den erforderlichen Deckkraftwert ein.