[0:v]split=2[c0v][c1v];[0:a]asplit=2[c0a][c1a];[c0v] trim=start=0:end=5.54,setpts=PTS-STARTPTS,fps=25,settb=AVTB [t0v]; [c0a] atrim=start=0:end=5.04,asetpts=PTS-STARTPTS [t0a]; [c1v] trim=start=650.05:end=651.17,setpts=PTS-STARTPTS,fps=25,settb=AVTB [t1v]; [c1a] atrim=start=650.05:end=651.17,asetpts=PTS-STARTPTS [t1a]; [t0v][t1v]xfade=transition=fade:duration=0.5:offset=5.04[outv];[t0a][t1a]concat=n=2:v=0:a=1[outa];