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  1. #1
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    Looking for TIMELAPSE CACULATOR

    Hi... I am trying to make some timelapse movies for my youtube channel. My Digital SLR is capable of taking shots at intervals but my maths is terrible and I am having a hard time working out the time between shots i need to make the final video the length I want.

    I found a few calculators though Google but I couldn't get them to do what I want.. I was wondering if anyone knew of a timelapse calculator i could use... or if you know the maths for working it out so i can do it myself...

    ----------------------------------------------------------------------------------------------------------------------------------

    Basically I wish to know this.....
    • If I have a target length in time of the video I wish to create
    • And I know the final video is running at 25 FPS
    • And I know the period of time i want to shoot to make the timelapse from


    How many seconds between each shot do I need to set the camera up to take?

    ----------------------------------------------------------------------------------------------------------------------------------

    Example:

    Event takes:- 6 hours
    Video runs @:- 25 FPS
    Final Video length = 10 Minuets

    Time in Seconds Between each photo = ????

    ----------------------------------------------------------------------------------------------------------------------------------


    Anyway I hope someone can help...

    Thanks in advance

  2. #2
    Moderator Skyman's Avatar
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    Re: Looking for TIMELAPSE CACULATOR

    I could be calculating this wrong, but by my way of reckoning if you want 10minutes@25fps that is 10x60x25=15000 frames total. The event is 6 hours which is 6x60x60=21600 to calculate how many seconds for the event. so to calculate the interval simply divide the total event time by teh required number of frames 21600/15000=1.44 seconds between each photo!
    Quidquid latine dictum sit, altum videtur


  3. #3
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    Re: Looking for TIMELAPSE CACULATOR

    Quote Originally Posted by Skyman
    I could be calculating this wrong, but by my way of reckoning if you want 10minutes@25fps that is 10x60x25=15000 frames total. The event is 6 hours which is 6x60x60=21600 to calculate how many seconds for the event. so to calculate the interval simply divide the total event time by teh required number of frames 21600/15000=1.44 seconds between each photo!
    Ok... umm

    (10x60x25) = (10mins = 600secs = 15000 frames)
    (6x60x60) = (6 hours = 360mins = 21600secs) x25 = 540000 frames

    So wouldn't it be...

    540000 / 15000 = 36frames == 1.44 frames...

    hmm that is the same number you got.... I will give this a go...

    Thank you.

  4. #4
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    Re: Looking for TIMELAPSE CACULATOR

    OH.. i did a test seams to be working... but I totally forgot an extra calculation i need done...

    Each Frame.. needs to be on screen for at least 1/2 a second.

    So how would I work that out?

  5. #5
    Senior Member OldClicker's Avatar
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    Re: Looking for TIMELAPSE CACULATOR

    You cannot show it at 25 frames per second and have it on screen for 1/2 second. That would be 2 FPS. - TF
    -----------------
    I am no better than you. I critique to teach myself to see.
    -----------------
    Feel free to edit my photos or do anything else that will help me learn.
    -----------------
    Sony/Minolta - way more gear than talent.

  6. #6
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    Re: Looking for TIMELAPSE CACULATOR

    Quote Originally Posted by OldClicker
    You cannot show it at 25 frames per second and have it on screen for 1/2 second. That would be 2 FPS. - TF
    Well no... the frame rate of the video file is still 25 frames per second .. the image just needs to be held for "x" frames. Say 0.7 seconds or 0.5 seconds.

  7. #7
    Senior Member OldClicker's Avatar
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    Re: Looking for TIMELAPSE CACULATOR

    Got it. Since you are showing 25 FPS and want it to stay on screen for 1/2 second, you need 13 frames of each (actually will be .52 sec). Divide the number of frames needed from the above calculation by 13. - TF
    -----------------
    I am no better than you. I critique to teach myself to see.
    -----------------
    Feel free to edit my photos or do anything else that will help me learn.
    -----------------
    Sony/Minolta - way more gear than talent.

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