Somebody please bring fully functional ffmpeg to Android via F-Droid please, one which is not compiled against /storage/emulated/0/ like Termux, etc, are. Many users rely on multiple profiles and don't run anything in the primary profile. I know of nothing right now like this. No FFshare doesn't work for purpose as outlined.
Bonus if all of Termux can be fixed for secondary Android profiles,
Bonus if all of Termux can be fixed for secondary Android profiles,