MPEG Display Issue in Windows XP Home Edition

Hi,

I have an issue when trying to play a 30 minute MPEG, I believe its

MPEG1 because not all MPEGs have this issue.

When trying to play a 30 minute video clip, any player shows its only

20 seconds long and it will only play those 20 seconds of video, but

the audio will continue to play.

I've tried reinstalling/updating drivers, reinstalled DirectX 9.0 and

it doesn't seem to work. The only thing that works is I can convert it

to AVI format and this solves the issue.

I have a P4 3.0 Ghz with 1.5gig of Ram and an ATI Radeon 9250 video

card

My second PC plays them correctly. Anyone ever seen this issue?

Thanks

Dave