Adding Medibuntu Package Repository

Medibuntu repository provides all the playback and encoding capabilities that most Windows and Mac systems contain, but which Ubuntu’s creators decline to include by default in their systems, due to licensing restrictions and a lack of open-source code for those features. If you just want to get AAC playback, copyright DVDs playing, and newer versions of all the audio, video, and font files, load Medibuntu into your system. (Required)

Open your Terminal, copy and paste:

sudo wget --output-document=/etc/apt/sources.list.d/medibuntu.list http://www.medibuntu.org/sources.list.d/$(lsb_release -cs).list && sudo apt-get --quiet update && sudo apt-get --yes --quiet --allow-unauthenticated install medibuntu-keyring && sudo apt-get --quiet update
sudo apt-get -y update && sudo apt-get -y upgrade
sudo apt-get install app-install-data-medibuntu apport-hooks-medibuntu

If you are running a 32-bit version of Ubuntu, copy and paste in Terminal:

sudo apt-get install w32codecs libdvdcss2
sudo apt-get install libdvdnav4
sudo apt-get install libdvdread4
sudo /usr/share/doc/libdvdread4/./install-css.sh

If you are running a 64-bit version of Ubuntu, copy and paste in Terminal:

sudo apt-get install w64codecs libdvdcss2
sudo apt-get install libdvdnav4
sudo apt-get install libdvdread4
sudo /usr/share/doc/libdvdread4/./install-css.sh