The problem with this approach is that Movie Maker (and other applications) limit the speed at which these images are played back. As of now, the fastest frame rate Movie Maker allows is 8 frames per second, (or each frame is held for a duration of 0.125).

The easiest solution to this problem is to use a frame-grabbing application, which allows you to set the frame rate to faster speeds. Pro animators typically work in the 12-24 frames per second range.