[0:v]split=3[c1v][c2v][c3v];[0:a]asplit=3[c1a][c2a][c3a];[1:a]asplit=1[tc0a];[2:v] scale=3840:2160:force_original_aspect_ratio=1,pad=3840:2160:(ow-iw)/2:(oh-ih)/2:color=white,setsar=1:1,fps=24,settb=AVTB [t0v]; [tc0a] atrim=start=0:end=2.98,asetpts=PTS-STARTPTS [t0a]; [c1v] trim=start=2.980000000000018:end=26.060000000000016,setpts=PTS-STARTPTS,fps=24,settb=AVTB [t1v]; [c1a] atrim=start=2.980000000000018:end=26.060000000000016,asetpts=PTS-STARTPTS [t1a]; [c2v] trim=start=26.32000000000002:end=46.01000000000002,setpts=PTS-STARTPTS,fps=24,settb=AVTB [t2v]; [c2a] atrim=start=26.32000000000002:end=46.01000000000002,asetpts=PTS-STARTPTS [t2a]; [c3v] trim=start=46.47999999999999:end=52.249999999999986,setpts=PTS-STARTPTS,fps=24,settb=AVTB [t3v]; [c3a] atrim=start=46.47999999999999:end=52.249999999999986,asetpts=PTS-STARTPTS [t3a]; [t0v][t1v]xfade=transition=fade:duration=0.5:offset=2.98[vfade1];[vfade1][t2v]concat=n=2:v=1:a=0[vfade2]; [vfade2][t3v]concat=n=2:v=1:a=0[outv]; [t0a][t1a][t2a][t3a]concat=n=4:v=0:a=1[outa];