How to tell when a QTMovie starts playing?

Question

So QTMovies have QTMovieDidEndNotification, but no QTMovieDidStartNotification. How can I be notified when a QTMovie starts playing?

Answer 1

Answering my own question: the QTMovieRateDidChangeNotification is activated when the movie starts to play. Of course the documentation doesn't actually document that. Bah.