Yes, that's how I do it. I have a script that takes a list of cuts, source videos/images, and effects, and runs ffmpeg to produce the final result. That's also

Yes, that's how I do it. I have a script that takes a list of cuts, source videos/images, and effects, and runs ffmpeg to produce the final result. That's also how many GUI video editing tools work - they just use the GUI to build the cut list.