Not sure this is of help for enormous files but slapped this ffmpeg script together with a friend a while ago for a similar need to split images for printing. M

Not sure this is of help for enormous files but slapped this ffmpeg script together with a friend a while ago for a similar need to split images for printing. Might point you in a direction at least. Excuse the virtue signaling vibe on the repo. It was a while ago. https://github.com/tombetthauser/protest_signsplitter/blob/master/sign_maker.sh https://github.com/tombetthauser/protest_signsplitter/blob/m...