As of 20220926, MakeMKV is broken on Arch Linux due to glib and various other files being updated in Arch but not in MakeMKV. To fix this issue which shows up as a “Fatal error”, you must install downgrade from the AUR.

This is a feature found in almost every Linux package manager but the one built designed for pacman works very easily and offers you various versions of the previous builds so that you could downgrade other programs that may act funky or are not working correctly.

Due to Arch Linux’s rolling-release nature, some programs may not handle the best when upgraded or weren’t packaged right to handle the latest build or what-not.

Procedure

yay -S downgrade

Once that is complete you will need to downgrade a few files.

sudo downgrade glibc=2.35-6 lib32-glibc=2.35-6 gcc-libs=12.1.0-3 gcc=12.1.0-3

The main AUR Arch Linux page for MakeMKV show the same process found here: https://aur.archlinux.org/packages/makemkv