ubuntu - video player reported error reading media upon encrypted DVD

After inserting an DVD and started playing, vlc complain that it was unable to read the media. Totem & Kmplayer have the similar error message as well. Playing the same dvd on MAC or dvd player with TV was fine.

No helpful messages was shown in the previous players on Ubuntu. Lastly, mplayer (command line based player) was used to troubleshoot the problem as it runs in the console and would output any error, plainly. It turns out that dvd was a encrypted dvd. Which need additional packages for it to run properly :

apt-get install ubuntu-restricted-extras

/usr/share/doc/libdvdread3/install-css.sh

apt-get install libxine1-ffmpeg

apt-get install vlc

(vlc is preffered, totem-xine seems to work as well)

Start vlc and play again the DVD.

Voila !!!