Or maybe, if you could give the parameters you use to compile your own FFMPEG for Odroid XU4. TOday I am using the last Emby (I tryed to use yours but the client apps doesnt support that server anymore ).
So today I have a 4.5 emby server and my XU4 is using armbian Buster Minimal with Kernel 5.4 stable.
Anything would be a great help!!!