I have some .mkv files and I'm trying to play then in VLC. The audio works but the video does not (just a black screen).
I tried in the "Videos" program. There is video but its very choppy and not fluid.
I have installed the "snap" version of VLC then snap run vlc. That didn't change anything.
I tried to install ubuntu-restricted-extras but it doesn't seem to exist for 18.04.
Any ideas? This is getting frustrating!!