How to get fps from video in java?

I have some task to do video processing and I want to do it with openCV and java. The problem is when I didn't do much process there the video runs so fast. On the other hand when there is plenty thing to do with the video, the video runs so slow on my program. I got an idea to do something with the fps and then I only get [this][1] and still wonder **how to get fps from video in java** with or without openCV. any help will be appreciated, especially if you can solve my root problem :) [1]: http://stackoverflow.com/questions/24070528/opencv-dramatically-increase-frame-rate-from-playback