Here is the Jitter/Visual Recipes page
Automatic Information on QuickTime Movies
The jit.qt.movie object uses QuickTime movies. When you load a movie, you often want to know information about the movie itself - how many frames does it have? What's the length of the movie in milliseconds?
This patchlet uses get messages to the jit.qt.movie object to report that data to you whenever a movie is loaded.