Does XP cause an audio file size bloat when authoring video?

[joeAgain------]

The strangest problem is showing up in authoring the same Mpeg-2(Mpeg-1, Layer2 audio) capped video file in my XP computer compared to my W2K/Win98 computer.

I can author and burn the same file in W2K and Win98 using Ulead's MovieFactory2 or VideoStudio7, or Pinnacle's PowerDirector Pro without any significant file size change problems and it fits easily when authored onto a DVD disk.

But when I use any of those programs on my XP Pro computer with the same file, there is some kind of an increase in the file size that makes it WAY above what will fit onto a 4.7Gig DVD disk.

I have never changed any audio compression/decompression settings in any of those programs between the different operating systems(I don't even know where they would be to change them)...or any other setting changes at all.

What can make XP want to increase the file size as much as a whole Gig when authoring it to burn onto a DVD?

Is there something about XP that makes it decompress audio by default, and the other O/Ss don't? (I don't see any place in MovieFactory to change audio compression/decompression...so how can this be?)

[suerpflysocal]

see if there is an audio option that allows you to convert audio to ac3 (Dolby digital)

That worked for me in dvdit, otherwise i got files that were 800 to 1 gig over expected.

[joeAgain------]

No, but all I want it to do is to keep the audio the same as it was capped.

In Mpeg-1, Layer2....not convert it to LPCM. Those are the 2 options in the programs(Mpeg or LPCM), but no matter how many time I tell it to keep the audio at mpeg-1, VideoStudio always decompresses it to LPCM!

It doesn't seem to disregard that setting on my W2K and Win98 computer.

Why does it always decompress to LPCM on my XP computer?

Anybody use those programs on XP and know why? This is weird!