@krvam ffmpeg for vps/dedicate server share host not use it.
if you have vps/dedicate server. you don't need to have FFMPEG installed on the server to have XMG fully working.
All you have to do is download the single binary of FFMPEG, upload it on your server and point it on your XMG admin Option.
Can be downloaded here: https://johnvansickle.com/ffmpeg/