[0:v]split=1[c0v];[0:a]asplit=1[c0a];[c0v] trim=start=0:end=50.61,setpts=PTS-STARTPTS,fps=24,settb=AVTB [t0v]; [c0a] atrim=start=0:end=50.61,asetpts=PTS-STARTPTS [t0a]; [t0v]concat=n=1:v=1:a=0[outv]; [1:a]atrim=start=0:end=38.11,asetpts=PTS-STARTPTS[am],[am][2:a]concat=n=2:v=0:a=1[bgAudio];[bgAudio]loudnorm=I=-25.3[sba],[t0a][sba]amix=duration=shortest:normalize=0[outaa0];[outaa0]concat=n=1:v=0:a=1[outaa];