[0:v]split=2[c0v][c2v];[0:a]asplit=2[c0a][c2a];[1:a]asplit=1[cm1a];[2:v] crop=6720:3780:0:0,scale=1920:1080:force_original_aspect_ratio=1,pad=1920:1080:(ow-iw)/2:(oh-ih)/2:color=white,setsar=1:1,fps=25,settb=AVTB [t0v]; aevalsrc=0:d=4 [t0a]; [c0v] trim=start=0:end=8.7,setpts=PTS-STARTPTS,fps=25,settb=AVTB [t1v]; [c0a] atrim=start=0:end=8.2,asetpts=PTS-STARTPTS [t1a]; [3:v] trim=start=0:end=12.66,setpts=PTS-STARTPTS,scale=1920:1080:force_original_aspect_ratio=1,pad=1920:1080:(ow-iw)/2:(oh-ih)/2:color=white,setsar=1:1,fps=25,settb=AVTB [t2v]; [cm1a] atrim=start=8.200000000000045:end=20.360000000000046,asetpts=PTS-STARTPTS [t2a]; [c2v] trim=start=20.360000000000014:end=60.08000000000001,setpts=PTS-STARTPTS,fps=25,settb=AVTB [t3v]; [c2a] atrim=start=20.360000000000014:end=60.08000000000001,asetpts=PTS-STARTPTS [t3a]; [t0v][t1v]xfade=transition=fade:duration=0.5:offset=4[vfade1];[vfade1][t2v]xfade=transition=fade:duration=0.5:offset=12.2[vfade2];[vfade2][t3v]xfade=transition=fade:duration=0.5:offset=24.36[outv];[t0a][t1a][t2a][t3a]concat=n=4:v=0:a=1[outa];