I played some games with QuickTime when I was at Apple, loved the format, even loved the stack, as creaky as it was in (gasp) 2004. The idea that the file can c

I played some games with QuickTime when I was at Apple, loved the format, even loved the stack, as creaky as it was in (gasp) 2004. The idea that the file can carry tracks that the given reader might not understand allowed me to, for instance, put codec metadata back into intermediates that would otherwise be lost, for PQ analysis purposes.