The video webkitgtk-simplecompositor-forcecompositing-mode_balls-old-settinterval.mp4 has been recorded at 60.0 FPS and lasts 8.2 seconds.
This means that the video contains a total of 492.0 frames.
However, many of this frames may be the same (the image don't changes)
So, please wait meanwhile I try to compute how many frames are actual different (the image changes)
...........................................................

Done:
    - The video has a total of 81 different (different images) frames
    - This means that the video has in reality 9.87804878049 FPS
    - This is the breakdown of real FPS for each one of the 8.2 seconds that the video lasts
        - second 1 = 4 FPS
        - second 2 = 15 FPS
        - second 3 = 12 FPS
        - second 4 = 12 FPS
        - second 5 = 13 FPS
        - second 6 = 13 FPS
        - second 7 = 12 FPS
        - second 8 = 0 FPS