This is Xtheater.  It is a gtk-based mpeg player that links to libsmpeg.
This program is distributed under the GNU Public License (GPL) version 2.
See the file COPYING for details.

A few notes:
Full-screen STILL may have a few bugs.  If it bugs out, you may not have 
any working control over your system aside from telneting in and sysrq..
Use at your own risk, it uses root privs also, so be careful and review the
source if you are scared.
(While it is possilbe to have non-root users doing fullscreen, that requires
the user to have read-write on /dev/mem, which is a Bad Thing, so just be root)

Also on fullscreen:
The way fullscreen mode works is by asking the X-server for the smallest 
available resolution that is bigger than the mpeg it has in it's config and 
using that, the display will not be fullscreen if you do not have sufficiently 
small modes available.  A few modelines that I personally use are in the file
Modelines.sample.  These modes may be dangerous to your configuration, be
careful and edit them to whatever you wish.  They CAN damage hardware not 
designed to take it.
