The one I use by Ulead (DVD Movie Factory) has a "do not convert MPEG compliant files" option, which allows you to skip that if unnecessary.
I am seeking help in choosing a DVD authoring software, that doesn't have to render MPEG 2 files to author a dvd. I have captured the video in MPEG 2 format and it seems a great waste of time to have to re-render it to make a dvd. Does anyone know of a software that doesn't have to re-render MPEG 2 files to make a dvd?
Thanks

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic