Thanks! I'm contributing to an open-source project where we do a lot of standardization (including MP4). We're trying to improve the parser generation by using a model from the specification. We even have some funding for this. I'd be happy if we could discuss this (contact@gpac.io). Better standards means a better world for everyone :)
Yes that's exactly what it is about! Unfortunately, our current result shows that it still requires much time to model the spec correctly. Any help appreciated, my contact is available on the message above :)