MythTV playback issue

[Travis Roy]

This might be a bit off topic but I thought I would give it a try..

So I downloaded a video from the Long Way Round website
(www.longwayround.com). It plays fine on my mac if I use Quicktime,
VLC, or Mplayer.. But when I play it on my Knoppmyth box with either
mplayer or xine I get a green vertical bar in the middle of the video.

Here's the specs of the video from the website:

752 x 416 pixels - 25fps - MPEG4 ISMA Container - MPEG4 AVC (H264)
Video Codec - AAC Audio Codec

-- 
Travis Roy