[0:v]split=2[c0v][c1v];[0:a]asplit=2[c0a][c1a];[1:v]split=1[c2v];[1:a]asplit=1[c2a];[2:v]split=1[c3v];[2:a]asplit=1[c3a];[c0v] trim=start=0:end=20.89,setpts=PTS-STARTPTS,fps=25,settb=AVTB [t0v]; [c0a] atrim=start=0:end=20.39,asetpts=PTS-STARTPTS [t0a]; [c1v] trim=start=289.88:end=307.62,setpts=PTS-STARTPTS,fps=25,settb=AVTB [t1v]; [c1a] atrim=start=289.88:end=307.12,asetpts=PTS-STARTPTS [t1a]; [c2v] trim=start=0:end=14.53,setpts=PTS-STARTPTS,fps=25,settb=AVTB [t2v]; [c2a] atrim=start=0:end=14.03,asetpts=PTS-STARTPTS [t2a]; [c3v] trim=start=0:end=27.71,setpts=PTS-STARTPTS,fps=25,settb=AVTB [t3v]; [c3a] atrim=start=0:end=27.71,asetpts=PTS-STARTPTS [t3a]; [t0v][t1v]xfade=transition=fade:duration=0.5:offset=20.39[vfade1];[vfade1][t2v]xfade=transition=fade:duration=0.5:offset=37.629999999999995[vfade2];[vfade2][t3v]xfade=transition=fade:duration=0.5:offset=51.66[outv];[t0a][t1a][t2a][t3a]concat=n=4:v=0:a=1[outa];