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.
Types of DVR Capture Cards
Kinds of DVR Capture Cards include the following:
PCI DVR capture cards
PCI DVR capture cards fit into expansion slots in the computer's PCI rack.
They are commonly used in desktop computers and other stationary devices.
They can support multiple output ports and up to 16 DVR inputs.
PCMCIA DVR capture cards
PCMCIA DVR capture cards plug into smaller PCMCIA slots found in laptops and portable computers.
They usually have fewer ports and offer limited functions compared to PCI cards.
USB DVR capture cards
USB DVR capture cards are plugged externally from the USB port.
They are designed for mobile use and can easily be transferred between computers.
Most models use USB 2.0 ports, since older versions cannot handle heavy and continuous transfers.
Choosing DVR Capture Cards (Buying tips)
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.