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.

Default VCD device is /dev/cdrom, but this is configurable from the smpeg 
plugin options dialog.

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.

If you have hardware accelerated GL support, you can get "true" fullscreen,
see README.GL
