Puggo - Jar Jar's Yoda said: You wouldn't want to change the speed because I intend to do the pulldown later by setting the DVD pulldown flag on the final DVD.
But that's not the point. The video is at 29.97fps, and each of those frames is (as far as I can see) a unique image i.e. there is no telecine. It has to be slowed down to 23.976fps.