Install MKVtoolnix:
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*Used for Adding metadata to mkv video files such as MakeMKV BD rips.

For Ubuntu:
# sudo apt install mkvtoolnix-gui

Date: 2021-2022 (Ubuntu)

For Catchy OS:
# sudo pacman -Syu mkvtoolnix-gui

Date: March 30th 2026 (Catch OS)