http://www.my-guides.net/en/content/view/136/26/
you'll need to add an external repository and get libcss
alternative: k9copy
sudo apt-get install k9copy dvdrip subtitleripper ksubtitleripper gocr mplayer libdvdread4 debhelper fakeroot
sudo /usr/share/doc/libdvdread4/install-css.sh
You can install libdvdcss2 from a command line terminal as a 64-bit .deb package without installing the Medibuntu repositories:
wget -c http://packages.medibuntu.org/pool/free/libd/libdvdcss/libdvdcss2_1.2.10-0.2medibuntu1_amd64.deb
sudo dpkg -i libdvdcss2_1.2.10-0.2medibuntu1_amd64.deb
or a 32-bit .deb package:
wget -c http://packages.medibuntu.org/pool/free/libd/libdvdcss/libdvdcss2_1.2.10-0.2medibuntu1_i386.deb
sudo dpkg -i libdvdcss2_1.2.10-0.2medibuntu1_i386.deb