65、Install all the multimedia playback codecs you’ll ever need(安装所有多媒体解码器)
click Applications ! Add/Remove and then, in the Show dropdown list, select All Available Applications. Ensure All is selected in the list on the left, and then use the Search box to search for gstreamer. In the list of results, put a check alongside the following—once done, click the Apply Changes button:

    GStreamer extra plugins
    GStreamer ffmpeg video plugin
    Ubuntu restricted extras
    GStreamer plugins for mms, wavpack, quicktime, musepack
    GStreamer plugins for aac, xvid, mpeg2, faad
    GStreamer fluendo MPEG2 demuxing plugin
    enable DVD movie playback


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

Note that you will need to install the Xine version of Totem Movie Player if you want fuss-free DVD movie playback.