I am using Linux, ubuntu desktop 20.04 with the drivers that are installed
as default. I did a minimal installation with no 3rd party drivers as part
of the installation process. I am running the default desktop in X.
1920x1080 @ 60 Hz
I installed ffmpeg with the usual
*sudo apt install ffmpeg*
I granted required permissions to the ffmpeg exe :
*sudo setcap cap_sys_admin+ep `which ffmpeg`*
I tried the following too,.. but this made no difference :
*sudo usermod -a -G video $USER*
*sudo usermod -a -G render $USER*
I also tried the oibaf drivers.. but this made no difference either way.