Quicktime incomplete playback of MPEG-2 videos.

I have a couple of MPEG-2 files that Quicktime plays back flawlessly except that it believes that the file is shorter than it is.
For one file that is 2:01:40 Quicktime believes that the file ends at 1:31:40. VLC will play the entire file.
I have Quicktime Pro and the MPEG-2 plug in running on 10.4.7.
I'd really like this to work in FrontRow, suggestions?

How big are the files? I believe that QT has a file
size limit (4GB?).
Another possibility is that there may be a timecode
break. If so, you can use MPEG Streamclip to fix it.
G5   Mac OS X
(10.4)  
It seems MPEG Streamclip suffers from the same syndrome as QT and it appears the only way to play those movie is ... VLC!

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