Apply chroma key remove for hundreds of videos

Hi everyone,
I have hundreds of videos that I want to remove green chroma key, change this background (with chroma key) for a static image (JPEG), remove complete audio (not just turn off volume, but really remove) and compress in H264.
The problem that I have hundred of videos. Is it possible to make a batch script for that?
How can I do?
What is the correct version of HitFilm for that?