VBR
ffmpeg -y -i /u/apps/greenhouse/lib/../tmp/input/246507 -map_metadata -1 -vcodec libx264 -acodec libfdk_aac -profile:v main -level 3.1 -crf 23 -refs:v 2 -ac 2 -b:a 192k -ar 44100 -vbr 3 -preset faster -movflags +faststart -pix_fmt yuv420p -vf "scale='iw*sar:ih',scale='trunc(min(iw+mod(iw,2),1280)/2)*2:-2'" /u/apps/greenhouse/lib/../tmp/output/246507/899986.mp4

CBR
ffmpeg -y -i /u/apps/greenhouse/lib/../tmp/input/131 -map_metadata -1 -vcodec libx264 -acodec libfdk_aac -maxrate:v 2400k -minrate:v 2400k -r 30 -g 60 -sc_threshold 0 -bufsize 4800k -profile:v main -level 3.1 -refs:v 2 -preset faster -movflags +faststart -pix_fmt yuv420p -ac 2 -b:a 128k -ar 44100 -vf "scale='iw*sar:ih',scale='trunc(min(iw+mod(iw,2),1280)/2)*2:-2'" /u/apps/greenhouse/lib/../tmp/output/131/1286.mp4