try using VLC media player..
sudo aptitude install vlc vlc-plugin-*

In order to stream video via vlc, you also need to install the following packages.
sudo aptitude install avahi-daemon
sudo aptitude install avahi-utils

A VLC plug-in for Firefox can also be installed
sudo aptitude install mozilla-plugin-vlc

"universe" component

The universe component is a snapshot of the free, open source, and Linux world. In universe you can find almost every piece of open source software, and software available under a variety of less open licences, all built automatically from a variety of public sources. All of this software is compiled against the libraries and using the tools that form part of main, so it should install and work well with the software in main, but it comes with no guarantee of security fixes and support. The universe component includes thousands of pieces of software. Through universe, users are able to have the diversity and flexibility offered by the vast open source world on top of a stable Ubuntu core.

Please note: universe is not enabled by default when you install Ubuntu, you need to turn it on yourself. Canonical does not provide a guarantee of regular security updates for software found in universe but will provide these where they are made available by the community. Users should understand the risk inherent in using packages from the universe component.

You can enable the universe component by editing the file "/etc/apt/sources.list" after installing Ubuntu.

Popular or well supported pieces of software will move from universe into main if they are backed by maintainers willing to meet the standards set for main by the Ubuntu team.


Hopefully, that answers your question a bit better.

To disable or enable u go to
System>Administration>Software Sources
then click Ubuntu software tab..
tadaaa~~

check this web site..
http://www.ubuntugeek.com/install-mplayer-...eisty-fawn.html

maybe i can help but
please attach the whole output and not just the last sentence!..

Check whether all your repositories are enabled or not.
Go to system>Administration>Synaptic Package Manager>Settings>repositories. Now 'ADD' or just check the community maintained universe and non-free (copyright restricted) multiverse boxes. Then close the window and click 'reload' tab in Synaptic Package Manager.

after that try this command
sudo aptitude install mplayer libxine-extracodecs

This post has been edited by WesT(^_^)v: May 25 2007, 01:12 AM

hrmmm...
post ur /etc/apt/sources.list