.mpeg files inverted
 

I'll bet this is a real old chestnut for regular Winamp users, but as a newbie Im baffled why some mpeg files which I have converted from .vob files play upside down in Winamp. Do I need to change a setting or preference? and does it mean that if I burn these files for use on my DVD player they will appear upside down on the telly? (and if so, will I have to turn the telly upside down?!?)
Thanks in anticipation.

Mart.