The only thing you have to do really is add in a repository for Ubuntu and install the playback/codec that you need for Ubuntu or Salix. Since most people I know use Ubuntu or Linux Mint, these steps remain the same. Open up the terminal, then copy and paste the following line:
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 update
What this does is that it adds the repository as well as the GPG key that says it can be trusted and installed from. This is only for Ubuntu and spinoffs of Ubuntu, seeing as Salix has the component we need in their default repositories. Before closing the terminal, issue this command:
sudo apt-get install libdvdcss2 w32codecs -y
which will then install the DVD playback as well as media playback of non-standard formats.