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Frames per Second - How important is this?

by: duncansonline( 4732Feedback score is 1000 to 4,999) Top 1000 Reviewer
19 out of 25 people found this guide helpful.
Guide viewed: 4409 times Tags: Security | Surveillance | DVR | FPS | Capture





Frames per Second

Most DVR capture cards are 30 frames per second cards. (NTSC - North American Video Standard) When they are being used to run PAL cameras (European Video Standard) the frames per second rate is 25.

If you attach one camera to the card then it will view and record at 30 frames per second. If  you attach two cameras, that resource is shared between the two cameras, and you can view and record at 15 frames per second. If you attach four cameras, then you can view and record
at 7.5 frames per second.

Why frames per second is NOT THAT IMPORTANT!!!!

Well, it is, if you are using the card to study the mating habits of hummingbirds!

But we believe that the object in good surveillance is to be able to obtain high quality images that you can email to the police, print out on your color inkjet, and that can be used to prosecute an intruder or offender..

When you are running four cameras on a 30 fps card, an illegal act that takes 1-2 seconds, will produce 7 - 15 pictures that you can use to prove your case to the police!!!

A 30 fps card is by far your most cost effective choice for professional surveillance. If you absolutely need higher frame rates, consider buying more than one card, and then you could have up to 4 cards in one machine, driving 4 cameras, each with 30 frames per second viewing
and recording.

As soon as you go to the internet viewing, however, your frame rate will drop again, because the internet slows down the process.

Bottom line, 30 frames per second total resource is most likely all you need in 95% of the time you need surveillance.

        Want to drive   8 cameras - Purchase 2 cards - you need 2 PCI slots
        Want to drive 12 cameras - Purchase 3 cards - you need 3 PCI slots
        Want to drive 16 cameras - Purchase 4 cards- you need 4 PCI slots

Visit our eBay Store to View a Wide Assortment of COMPLETE Camera Kits!

We have a HUGE Assortment of Computer Capture Cards. From $30.00 up!

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Guide ID: 10000000001434437Guide created: 07/24/06 (updated 10/28/09)

 
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