[0:v]split=2[c0v][c2v];[0:a]asplit=2[c0a][c2a];[1:a]asplit=1[cm1a];[c0v] trim=start=0:end=3.86,setpts=PTS-STARTPTS,fps=25,settb=AVTB [t0v]; [c0a] atrim=start=0:end=3.36,asetpts=PTS-STARTPTS [t0a]; [2:v] trim=start=0:end=16.86,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 [t1v]; [cm1a] atrim=start=3.3600000000000136:end=19.720000000000013,asetpts=PTS-STARTPTS [t1a]; [c2v] trim=start=19.720000000000027:end=52.22000000000003,setpts=PTS-STARTPTS,fps=25,settb=AVTB [t2v]; [c2a] atrim=start=19.720000000000027:end=52.22000000000003,asetpts=PTS-STARTPTS [t2a]; [t0v][t1v]xfade=transition=fade:duration=0.5:offset=3.36[vfade1];[vfade1][t2v]xfade=transition=fade:duration=0.5:offset=19.72[outv];[t0a][t1a][t2a]concat=n=3:v=0:a=1[outa];