ffmpeg -i src.mkv -filter_complex "[0:v]trim=3:7,setpts=PTS-STARTPTS[v1]; [0:v]trim=22:25,setpts=PTS-STARTPTS[v2]; [0:a]atrim=3:7,asetpts=PTS-STARTPTS[a1]; [0:a]atrim=22:25,asetpts=PTS-STARTPTS[a2]; [v1][a1][v2][a2]concat=v=1:a=1" -c:v libx264 -c:a aac out.mkv