By A video capture card is a card for capacity expansion, which has the function of allowing the input of video/audio signals to the computer, so that it can be edited and manipulated according to the needs of the user. It is inserted into the expansion slots integrated into the main motherboard and is screwed to the cabinet to prevent movement and failure. Video capture cards integrate multiple ports for connecting external devices such as PlayStations, DVD players, VCR, TV, etc. Currently video capture cards compete in the market against external capture devices.
Characteristics of a Video Capture Card
- It is integrated into whether an integrated circuit or chip especially for professional video solutions.
- It has several ports for connecting the external devices from which it sends and receives audio/video signals.
- It has a special interface that allows to be inserted into the expansion slots of the motherboard.
- It can coexist with internal video cards installed on the motherboard, as its function is to receive the external audio/video but not to deploy the general video.
Video Capture Cards for Closed Circuit
There is a variant used for closed circuit television, applied in surveillance work. These have several ports of the same type, which allow to capture video from various surveillance cameras to monitor activities and/or store them in a computer for viewing later.
Channel Capacity
There is maximum number of signals from various cameras that is capable of receiving, and scalability to count.
Transmission Technology
It can support the use of BNC coaxial cabling, LAN-based UTP cable to RJ-45, VGA, and network connector support for IP cameras.
Recording Format
It is capable of recording MPEG, AVI and the number of frames per second (FPS).
Parts of a Video Capture Card
The components are visible, since it does not have protective cover which are as follows;
Card
It is the plate on which electronic components are mounted.
Chips
They are responsible for electronic card operation.
Connector
It is inserted into the slot of the motherboard and sends captured video signals.
Ports
They are responsible for receiving external signal.
Support
It is responsible for fixing the card to the cabinet and prevent movement.
Interface type for Slots
It basically uses the PCI (Peripheral Components Interconnect) interface which integrates a data capacity of 32-bit and 64-bit microprocessor and has a transfer rate of up to 125.88 megabytes per second to 503.54 megabytes per respectively. It has the internal working speed of 33 MHz for 32 bits and 66 MHz for 64 bits.
