For future updates, is it possible for your script to have batch img2img as part of the process as well?
Viewing post in (Beta) Multi-frame Video rendering for StableDiffusion comments
Looks fantastic!
As for the batches, I have been debating how they should work with it. I'm working on a system where you can have it generate multiple versions of each new frame then have it try to pick the best one at each iteration to get better consistency. I believe that would probably be the most useful way to use batch processing for it but it's not quite ready yet.