libmatroska6 software package provides extensible open standard audio/video container format (shared library), you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install libmatroska6
libmatroska6 is installed in your system.
Make ensure the libmatroska6 package were installed using the commands given below,
$ sudo dpkg-query -l | grep libmatroska6 *
You will get with libmatroska6 package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Libraries |
| Package | libmatroska6 |
| Version | 1.4.1-2+deb8u1build0.14.04.1 [ |
| Description | extensible open standard audio/video container format (shared library) |
| Sub Section | libs |