Good user interface, slick design, unfortunately bad results

I bought this app to try it out and was pleasently surprised until I looked at the exported videos. Unfortunately the video does not look very smooth. My comparision level is LRtimelapse Slideshow themes for Lightroom which create much smoother video results. I would be great if the author of this app can optimize his routines to generate the video.

The Dive R about Time-Lapse, v1.1