[0:a] atrim=start=0:end=28.976 [t0a]; [t0a]concat=n=1:v=0:a=1[a]; [1:v]crop=1200:1200:0:0,scale=768:-2,format=yuva420p[img_bg];[img_bg]subtitles='/imagecap/temp/01000000ba970a94432e08de004e7dc5.ass':fontsdir=/imagecap/temp/01000000ba970a94432e08de004e7dc5:force_style='Fontname='GothamNarrow-Book''[vbgsub];