[0:v]split=1[c1v];[0:a]asplit=1[c1a];[1:v]split=1[c0v];[1:a]asplit=1[c0a];[c0v] trim=start=0:end=1.28,setpts=PTS-STARTPTS[e_video];color=c=black:s=1280x720:r=30:d=0.5[black];[e_video][black]concat=n=2:v=1:a=0,settb=AVTB,fps=30,settb=AVTB [t0v]; [c0a] atrim=start=0:end=1.28,asetpts=PTS-STARTPTS [t0a]; [c1v] trim=start=0.4:end=1.32,setpts=PTS-STARTPTS,fps=30,settb=AVTB [t1v]; [c1a] atrim=start=0.4:end=1.32,asetpts=PTS-STARTPTS [t1a]; [t0v][t1v]xfade=transition=fade:duration=0.5:offset=1.28[outv];[t0a][t1a]concat=n=2:v=0:a=1[outa];