[0:v]split=2[c0v][c1v];[0:a]asplit=2[c0a][c1a];[c0v] trim=start=0:end=47.36,setpts=PTS-STARTPTS,fps=26,settb=AVTB [t0v]; [c0a] atrim=start=0:end=47.36,asetpts=PTS-STARTPTS [t0a]; [c1v] trim=start=47.86:end=70.32,setpts=PTS-STARTPTS,fps=26,settb=AVTB [t1v]; [c1a] atrim=start=47.86:end=70.32,asetpts=PTS-STARTPTS [t1a]; [t0v][t1v]concat=n=2:v=1:a=0[outv]; [t0a][t1a]concat=n=2:v=0:a=1[outa];