Well, for one, Quick Time opens in about 2 seconds, compared to Final Cut’s 30-second launch time. When I’ve got Nuendo or ProTools running (remember, we’re an audio company), I don’t see the need to launch yet another giant resource hog to do a job that can be done with a much simpler program. Not every .mov we create ends up in a demo reel, and we don’t know until months later which ones will. Spending an extra five minutes (and untold hard drive space) on each file to give it black video at the end when we don’t even know if we’ll need it simply isn’t an option.
Not only that, but these files aren’t always created exactly the way I described. Nuendo, ProTools, Cleaner, etc can all create .mov files with longer audio than video.
So workflow issues aside, there are a lot of different methods by which someone could end up with a .mov that has longer audio than video. Why can’t FCP use these files properly?