http://www.ubuntugeek.com/install-mplayer-and-multimedia-codecs-libdvdcss2w32codecsw64codecs-in-ubuntu-810-intrepid-ibex.html
sudo apt-get update sudo apt-get install mplayer sudo apt-get install smplayer sudo apt-get install smplayer-themes sudo wget http://www.medibuntu.org/sources.list.d/intrepid.list --output-document=/etc/apt/sources.list.d/medibuntu.list wget -q http://packages.medibuntu.org/medibuntu-key.gpg -O- | sudo apt-key add - && sudo apt-get update sudo apt-get update sudo apt-get install medibuntu-keyring sudo apt-get update For i386 Users install Codecs using the following command sudo apt-get install w32codecs libdvdcss2 For amd64 Users install Codecs using the following command sudo apt-get install w64codecs libdvdcss2 Using above download locations you can install most of the mutimedia codecs for ubuntu. Mplayer Plugin for Firefox If you want to install Mplayer with plug-in for Mozilla Firefox run the following command sudo apt-get install mozilla-mplayer