However, you can install the ability to play popular non-free media formats, including DVD, MP3, Quicktime, and Windows Media formats, by following the instructions below.
Install multimedia codecs in ubuntu 13.10
Open the terminal and run the following comamnd
sudo apt-get install ubuntu-restricted-extras
In addition, in order to play DVDs, you need to install libdvdcss by entering the following in a terminal:
Rebooting your PC may be necessary.