I didn't capture using HDVSplit. I captured using PRE8. (Most of it was captured before I knew about HDVSplit, so I was capturing directly into the project.) But there was way too much to edit, so I downloaded HDVSplit and used it to split the video that was already on my hard disk. Then I created a new project in PRE8, and imported only the clips I'm actually using.
PRE8 captured the video as mpeg, and HDVSplit created mpegs from it when it split them.