Debian Packages: xine-ui, xine-dvdnav, libdvdread2.
A highly recommended multi-media viewer is xine-ui, an MPEG2/MPEG1 audio/video player with a skinned graphical user interface.
Keyboard shortcuts for various functions include:
gui g pause p full screen f aspect a subtitles . , audio channel + - chapt PgUp PgDn chapt % 0-9 audio sync <- -> Home volume v V enlarge <> M-1,2,3 1:1 aspect s