Image Capture from Movie File

I don't need specifics (but that'd be wonderful) - here's the problem:

Is this possible (and what language would you recommend?)

I need to play a movie in a web browser (applets would be nice...) and then be able to STOP the movie at a certain frame, and then create an image file from that frame. Playing and stopping the movie isn't hard. i found API's and examples to do that.

basically, I need to write an image capture program. ugh. Why I can't use existing software products:
There is actually a top container program that does stuff, but plays movies through a web browser. I need to be able to display the image at later points in the top level program.

I found something about the JMF - java media framework - and I'm going to be reading through that this weekend. Is anyone familiar with the JMF / know if it will support image capture?

Thanks,
Programmer4Fun