A DVR card looks quite similar to the common computer video card in many PCs. However, when it comes to functioning, there are a lot of differences between them. DVR cards come with software that can be used to display and record information from multiple cameras at the same time. These are installed in computers to allow them to function as digital video recording (DVR) systems.
DVR cards are mostly used in surveillance systems to process the information received from a source such as a camera and pass it on to a storage device like a hard disk. In such a set up, there is more than one video out port. At these ports, the output from the security cameras is plugged in to the card. Once installed inside a computer, the card becomes active and is instantly recognized by the machine thanks to the accompanying software. Once properly installed, this card allows the user to digitally record signals on to his hard drive and then view it instantaneously.
Depending on need, you can also choose the quality of storage. DVR cards frames per second (fps) ranges are 30, 60,120,240 and 480. The fps also determines the time for which recording can be done. For a hard disk...
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