ffmpeg_720p.sh

ffmpeg -ss 0 -t 30  -i demo/sources/howto_fix_laptop_mute_1080p.mp4 -vf "scale='if(gt(a,1),-2,720)':'if(gt(a,1),720,-2)'" -an demo/sources/howto_fix_laptop_mute_720p.mp4 -y