[0:v]split=2[c1v][c2v];[0:a]asplit=2[c1a][c2a];[1:a]asplit=1[tc0a];[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 [t0v]; [tc0a] atrim=start=0:end=6.44,asetpts=PTS-STARTPTS [t0a]; [c1v] trim=start=6.440000000000055:end=28.270000000000053,setpts=PTS-STARTPTS,fps=25,settb=AVTB [t1v]; [c1a] atrim=start=6.440000000000055:end=27.770000000000053,asetpts=PTS-STARTPTS [t1a]; [c2v] trim=start=34.049999999999955:end=48.20999999999995,setpts=PTS-STARTPTS,fps=25,settb=AVTB [t2v]; [c2a] atrim=start=34.049999999999955:end=48.20999999999995,asetpts=PTS-STARTPTS [t2a]; [t0v][t1v]xfade=transition=fade:duration=0.5:offset=6.44[vfade1];[vfade1][t2v]xfade=transition=fade:duration=0.5:offset=27.77[outv];[t0a][t1a][t2a]concat=n=3:v=0:a=1[outa];