I'm a new iOS user, and previously on my Android device, from time to time I needed to change the aspect ratio of a video to 1:1 (to fit with Instagram).
So at that time, I was using this app that let's you directly type ffmpeg commands as if you were using a computer, so I it was simple to do it by using :
-vf "scale=720:720,setsar=1:1"
But unfortunately I didn't find any alternative on iOS.
So, does anyone know an app that will let me change the aspect ratio of a video?