Add FPS info in ``

I would like to be able to access the FPS (Frames Per Second) info of a movie file. Currently only tells me the length of the video, but FPS is also very helpful.

If we would like to be able to have a time display showing frame numbers, 1-24, 1-25, 1-30 eg. then we need to know the time base of the movie file loaded.

Opened for voting.