Simple Method For Calculating Speed Of Spin Bowling From Video

Discussion in 'Spin Bowling' started by boogiespinner, Jul 20, 2015.

Put it out there
  1. boogiespinner

    boogiespinner Active Member

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    1) Take a ball that hits the stumps
    2) Upload video to youtube
    3) Adjust the settings so it is playing at 0.25 (quarter speed)
    4) Play the video, with a stopwatch record the time from the release to hitting the stumps
    5) Calculate 200/[time]

    that is the speed from the hand in mph!

    roughly.... I make no guarantees of accuracy. It should be pretty close though
     
    someblokecalleddave likes this.
  2. someblokecalleddave

    someblokecalleddave Well-Known Member

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    Ah - I wondered how you'd come up with the speed for my bowling! I'll have to upload some more vids using my new faster action.
     
  3. boogiespinner

    boogiespinner Active Member

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    new faster action? already?
     
  4. someblokecalleddave

    someblokecalleddave Well-Known Member

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    Yeah it's something I've tried on a number of occasions and rejected over the last few years, but all the games I got wickets in were with an intermediate approach - faster than the video, but not as fast as I bowled today and yesterday. The McGrath thing seems to have worked for me, I'd tried the Warne 8 step approach before and a Stuart MacGill approach but without any idea of what I should be doing and why. The McGrath explanation was a bit of a potential epiphany - it looks like it may be something to work with? I bowled 4 x 6 balls tonight and using the long run-up/fast technique and it was fast and accurate (hitting the little mat at least 4 times out of the 24 balls). If the weather's good tomorrow, I'll video it.

    Too me it feels more MacGill-esque, than anything else, but once filmed I might be embarrassed with making that connection!!!
     
    Last edited: Jul 21, 2015
  5. Kris

    Kris New Member

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    Any way to calculate the revs on the ball? ;)
     
  6. boogiespinner

    boogiespinner Active Member

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    hmm maybe!

    I propose this method:

    you will need:
    1) two tone ball (or a white mark on the ball)
    2) a camera that films at high speed/slow motion
    3) a friend to do the filming

    So if you set the camera to film at the highest speed (e.g. my samsung galaxy S4 will do 1/8) bowl the two tone ball with a scrambled seam (actually the red ball with the white mark may be better on the seam) then you might be able to manually count the revolutions in a second of footage. Of course multiply by the slow motion rate of the camera and there's your answer. Putting it into a video editor where you can actually count exact frames (and scroll through them) may really help.

    Perhaps the best would be a red/white two-tone ball spun on the seam but with a blue or other coloured marking to track the spin.
     
  7. highesteem1

    highesteem1 Member

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    hi
    try to use two reasonably good Apps from App store...
    1. express pace
    2. Pace calculator
    showing reasonably stable results
     
  8. Neville Young

    Neville Young New Member

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    boogiespinner likes this.
Put it out there