Computer's frames per second
- Bushido Philosopher
- Joined: Mon Jun 25, 2001 7:19 pm
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Computer's frames per second
What frame rate does a computer display?
Or if it doesn't display by FPS, then what does it?
Or if it doesn't display by FPS, then what does it?
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- klinky
- Joined: Mon Jul 23, 2001 12:23 am
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Computers are varible things. They can display at all sorts of refresh rates. It really depends on how fast your computer.
What you really need to know is the frame rate need to meet film standard and that is 24 frames per second. However for reasons detailed in ErMaC's guide that gets converted to 29.97 when exported to things like tapes/laser discs/dvds(not all of them). So when you 'capture' using a analog capture card you'll want to capture @ 29.97fps.
~klinky
What you really need to know is the frame rate need to meet film standard and that is 24 frames per second. However for reasons detailed in ErMaC's guide that gets converted to 29.97 when exported to things like tapes/laser discs/dvds(not all of them). So when you 'capture' using a analog capture card you'll want to capture @ 29.97fps.
~klinky
- Bushido Philosopher
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- klinky
- Joined: Mon Jul 23, 2001 12:23 am
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Most likely, I believe the reason it looks flickery or you see a 'bar' moving up the screen is because the camera catches it in mid refresh and since you only capture at 29.97 or 24fps while a monitor refreshes at atleast 60hz(hz = "sorta fps"), alot of monitors actually run @ 85hz or even higher. So it sorta creates this "illusion", not quite sure if I am correct about that tho.
~klinky
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That flicker you see is from the CRT redrawing the image. (You don't get that problem on LCDs or on monitors that have their refresh rates cranked up.) The human eye can't catch the refresh, but a camera can.Ko Oh Yoku wrote:Hmm....so that's why when you record on an analog camera that the screen looks all flickery and/or weird?
Oh, and hertz is just "cycles per second", and can therefore be used to describe anything that's periodic in nature: monitor vertical/horizontal refresh rates (though we usually use kHz for the former), CPU speeds, radio frequencies, jbone's humor quality, etc.
As far as what frame-rate a computer (program, I presume) displays: That's the frame-rate that your program is achieving -- how many complete frames (as defined by the image width+height) the program has been able to write to the video buffer per second (as defined by the internal clock). It has nothing to do with what rate your display device refreshes at, although if your display device refresh rate is too low to keep up with what the display adapter is blasting out, you'll get odd, and rather eye-straining, artifacts.
- The Wired Knight
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- RadicalEd0
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