[0:a] atrim=start=0:end=19.36 [t0a]; [1:a] atrim=start=0:end=4.62 [t1a]; [2:a] atrim=start=0:end=11.28 [t2a]; [3:a] atrim=start=0:end=6.88 [t3a]; [t0a][t1a][t2a][t3a]concat=n=4:v=0:a=1[a]; [4:v]crop=1200:1200:0:0,scale=768:-2,format=yuva420p[img_bg];[img_bg]subtitles='/imagecap/temp/0100000035f152c6b0a808de25f41d8b.ass':fontsdir=/imagecap/temp/0100000035f152c6b0a808de25f41d8b:force_style='Fontname='GothamNarrow-Book''[vbgsub];