Install MKVToolNix 27.0.0 on Ubuntu system using PPA

With these tools one can get information about (mkvinfo) Matroska files, extract tracks/data from (mkvextract) Matroska files and create (mkvmerge) Matroska files from other media files. Matroska is a new multimedia file format aiming to become THE new container format for the future. You can find more information about it and its underlying technology, the Extensible Binary Meta Language (EBML), at http://www.matroska.org/

What's New:

New features and enhancements

• mkvmerge: chapters: the timestamps of chapters read from containers or from chapter files can be adjusted (multiplication and addition) with the new --chapter-sync option or using the special track ID -2 for the existing --sync option. Part of the implementation of #2358.
• MKVToolNix GUI: multiplexer: adjusted & added controls for mkvmerge’s new feature of being able to adjust chapter timestamps. Part of the implementation of #2358.
• MKVToolNix GUI: multiplexer: the GUI can now ask for confirmation when the user is about to create a file that won’t contain audio tracks. It does this by default if at least one source file contains an audio track. Implements #2380.

Bug fixes

• mkvmerge: AC-3: dialog normalization gain removal was corrupting E-AC-3 frames irreversibly by writing checksums in places where they didn’t belong. Additionally only the first E-AC-3 frame in a Matroska was processed but not additional dependent frames in the same block. Fixes #2386.
• MKVToolNix GUI: fixed a leak of Windows font resources leading to a general slowdown and subsequent crash. Fixes #2372.

How to Install & Update MKVToolNix 27.0.0 on Ubuntu / Linux Mint Derivative System :

To install/update MKVToolNix 27.0.0 (PPA Launchpad) on Ubuntu 18.04 Bionic Beaver, Ubuntu 17.04 Zesty Zapus, Ubuntu 16.04 Xenial Xerus, Linux Mint 19.1, Elementary OS, Peppermint, Deepin 15.7, Linux Lite 4.2 and other Ubuntu derivative systems, open a new Terminal window and bash (get it?) in the following commands:
You first have to import my public GPG key because all of my pools are signed. Run this once:

wget -q -O - https://mkvtoolnix.download/gpg-pub-moritzbunkus.txt | sudo apt-key add -

You can access the packages by adding the appropriate lines below to a file such as /etc/apt/sources.list.d/mkvtoolnix.download.list:

For ubuntu 18.04 'bionic beaver' open terminal and follow this commad :

sudo sh -c 'echo "deb https://mkvtoolnix.download/ubuntu/ bionic main" >> /etc/apt/sources.list.d/mkvtoolnix.download.list'

sudo sh -c 'echo "deb-src https://mkvtoolnix.download/ubuntu/ bionic main" >> /etc/apt/sources.list.d/mkvtoolnix.download.list'

For ubuntu 16.04 'xenial xerus' open terminal and follow this commad :

sudo sh -c 'echo "deb https://mkvtoolnix.download/ubuntu/ xenial main"" >> /etc/apt/sources.list.d/mkvtoolnix.download.list'

sudo sh -c 'echo "deb-src https://mkvtoolnix.download/ubuntu/ xenial main" >> /etc/apt/sources.list.d/mkvtoolnix.download.list'

Update ubuntu repository and install mkvroolnix on ubuntu system :

sudo apt-get update

sudo apt install mkvtoolnix mkvtoolnix-gui

After installation is completed, you can open MKVtoolnix on ubuntu system menu :