ffmpeg -f v4l2 -video_size 1280x720 -framerate 10 -i /dev/video0 -f x11grab -framerate 30 -video_size 1600x900 -i :0.0 -f alsa -i pulse -filter_complex '[0:0]scale=260:-1,setpts=PTS-STARTPTS[cam];[1:0]scale=iw*min(1080/iw\,720/ih):ih*min(1080/iw\,720/ih),setpts=PTS-STARTPTS[main];[main]pad=1280:720:0:0[ovr1];[ovr1][cam]overlay=W-w:H-h[vid];[2:0]asetpts=PTS-STARTPTS[aud]' -map '[vid]' -map '[aud]' -c:a libvorbis -q:a 4 -c:v libx264 -pix_fmt yuv444p -preset veryfast -crf 18 -y -threads 1