.mkv video files are not playing in the video player & VLC in Ubuntu 14.04

 .mkv video files are not playing in the video player & VLC in Ubuntu 14.04

.mkv file is not able to play in the default Video player in Ubuntu 14.04. It shows codec missing error.

Tried to play in VLC, again same issue.

In both the players audio is perfect. only the problem with the video.


Solve it with install

sudo apt-get install ubuntu-restricted-extras
#source : http://ubuntuforums.org/showthread.php?t=2224597