[0:v]split=1[c0v];[0:a]asplit=1[c0a];[1:v]split=1[c1v];[1:a]asplit=1[c1a];[c0v] trim=start=0:end=7.54,setpts=PTS-STARTPTS,fps=15,settb=AVTB [t0v]; [c0a] atrim=start=0:end=7.04,asetpts=PTS-STARTPTS [t0a]; [c1v] trim=start=0:end=7.84,setpts=PTS-STARTPTS,fps=15,settb=AVTB [t1v]; [c1a] atrim=start=0:end=7.84,asetpts=PTS-STARTPTS [t1a]; [t0v][t1v]xfade=transition=fade:duration=0.5:offset=7.04[outv];[t0a][t1a]concat=n=2:v=0:a=1[outa];