[0:v]split=4[c0v][c1v][c2v][c3v];[0:a]asplit=4[c0a][c1a][c2a][c3a];[c0v] trim=start=0:end=12.9,setpts=PTS-STARTPTS,fps=30,settb=AVTB [t0v]; [c0a] atrim=start=0:end=12.4,asetpts=PTS-STARTPTS [t0a]; [c1v] trim=start=20.47:end=31.61,setpts=PTS-STARTPTS,fps=30,settb=AVTB [t1v]; [c1a] atrim=start=20.47:end=31.11,asetpts=PTS-STARTPTS [t1a]; [c2v] trim=start=64.38:end=66.08,setpts=PTS-STARTPTS,fps=30,settb=AVTB [t2v]; [c2a] atrim=start=64.38:end=65.58,asetpts=PTS-STARTPTS [t2a]; [c3v] trim=start=73.32:end=82.52,setpts=PTS-STARTPTS,fps=30,settb=AVTB [t3v]; [c3a] atrim=start=73.32:end=82.52,asetpts=PTS-STARTPTS [t3a]; [t0v][t1v]xfade=transition=fade:duration=0.5:offset=12.4[vfade1];[vfade1][t2v]xfade=transition=fade:duration=0.5:offset=23.04[vfade2];[vfade2][t3v]xfade=transition=fade:duration=0.5:offset=24.24[outv];[t0a][t1a][t2a][t3a]concat=n=4:v=0:a=1[outa];