Digital video recorder (DVR) capture cards receive video feeds from DVRs onto the computer's hard drive for playback or editing. They have four or more ports for connecting to multiple DVRs, as well as output ports for monitors or other display devices. They are commonly used for security and surveillance applications. They usually come with driver software, which provides an interface for operation and offers additional functions such as DVD burning, motion sensors, and image watermarking.
Number of ports: Choose a DVR capture card with enough ports to drive the DVR devices in your system. Allow some extra ports for expansion if you want to add DVRs in the future. Look for multiple output ports compatible with common display devices, such as monitors and TV screens. Frame rate: Choose a DVR capture card with a frame rate of at least 30 frames per second (fps) for NTSC and 25 fps for PAL video formats. Higher frame rates are seldom noticeable in most applications. Choose a high frame rate only for recording fast action or if you need exceptional video quality.
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