[0:v] scale=1920:1080:force_original_aspect_ratio=1,pad=1920:1080:(ow-iw)/2:(oh-ih)/2:color=white,setsar=1:1,fps=25[i_video];color=c=black:s=1920x1080:r=25:d=0.5[i_black];[i_video][i_black]concat=n=2:v=1:a=0,settb=AVTB [t0v]; [0:a]asetpts=PTS-STARTPTS[t0a]; [1:v]split=4[c0v][c1v][c2v][c3v];[1:a]asplit=4[c0a][c1a][c2a][c3a];[c0v] trim=start=0:end=23.58,setpts=PTS-STARTPTS,setsar=1:1,fps=25,settb=AVTB [t1v]; [c0a] atrim=start=0:end=23.58,asetpts=PTS-STARTPTS [t1a]; [c1v] trim=start=25.53000000000003:end=32.13000000000003,setpts=PTS-STARTPTS,setsar=1:1,fps=25,settb=AVTB [t2v]; [c1a] atrim=start=25.53000000000003:end=32.13000000000003,asetpts=PTS-STARTPTS [t2a]; [c2v] trim=start=32.30000000000001:end=53.68000000000001,setpts=PTS-STARTPTS,setsar=1:1,fps=25,settb=AVTB [t3v]; [c2a] atrim=start=32.30000000000001:end=53.68000000000001,asetpts=PTS-STARTPTS [t3a]; [c3v] trim=start=53.96999999999997:end=80.52999999999997,setpts=PTS-STARTPTS,setsar=1:1,fps=25,settb=AVTB [t4v]; [c3a] atrim=start=53.96999999999997:end=80.02999999999997,asetpts=PTS-STARTPTS [t4a]; [2:v] 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 [t5v]; [2:a] asetpts=PTS-STARTPTS [t5a]; [t0v][t1v]xfade=transition=fade:duration=0.5:offset=3.533333[vfade1];[vfade1][t2v]concat=n=2:v=1:a=0[vfade2]; [vfade2][t3v]concat=n=2:v=1:a=0[vfade3]; [vfade3][t4v]concat=n=2:v=1:a=0[vfade4]; [vfade4][t5v]xfade=transition=fade:duration=0.5:offset=81.153333[outv];[t0a][t1a][t2a][t3a][t4a][t5a]concat=n=6:v=0:a=1[outa];