I love using FFMpeg via Wasm for ... senseless ... mini projects i.e.: https://video-2-sprites.franzai.com/ Video 2 Sprites Converter - totally over-engineered

One thing I have never been able to do reliably is get ffmpeg to split a file based on a fixed size - e.g. break this video into 100MB chunks.

The closest I seem to be able to get is to divide the file size by the file length, add some wiggle room and then split it based on time. Any pointers appreciated.