How to install Ubuntu multimedia codecs

How to install all multimedia codecs in ubuntu

and kubuntu

very easy

Ubuntu Linux [1] is a Debian-based, desktop Linux distribution whose name
means “humanity to others.” The philosophy behind this GNU/Linux
distribution and the great selection of packages make you feel good that
you’re using it. The lack of multimedia support, however, leaves your
digital media desires unsated.

in the terminal :

sudo apt-get install ubuntu-restricted-extras

have fun