Files that played just fine yesterday now won’t play and the message “Error playing video file - unsupported format” appears. This affects my entire library.
They played just fine yesterday and no changes have been made to the files.
Just checked all DeoVR files. Seems their latest is Sept. 8th. So probably have nothing to do with the program. Perhaps the settings like "Using Alt method", "use direct draw" or video card driver update...etc.
I ended up fixing this by deleting then re-connecting my media library on Plex. No idea what that was about.