Avisynth tinkering

Here is the current state of my project. Rather, my idea of what my project will be. I've began by creating a blank clip that supposedly spans the the entirety of the longest clip. Next, I overlaid one clip and then again overlaid a third clip to the resulting video.



The issue that faces me now is that the final clip is awfully slow. Painfully slow. What I think is happening is that the initial clip has an FPS lower than the ones overlaid onto it. That's my guess anyway. Now, I have to see if there's a way to fix it.

I see a lot of google searchings for me in the near future.