[ubuntu-uk] Ogg playback problem

[Gary Kearley]

I have a problem trying to playback the .ogg file Alan created.

I can play the ogg file from the "example content" fine, but trying to
play Alan's ogg file causes Mplayer to display "Error
opening/initializing the selected video_out (-vo) device." and causes
Totem movie player (now using totem gstreamer) to just open, display a
black playing window for half a second and then close, no reported
errors.

I have no idea why, especially as the nelson mandella video plays fine,
and the properties for both videos are very similar.

Any ideas?

Thanks

Gary