If you are using analog surveillance cameras, one or more video capture cards are required. If you have multiple cameras (video out), you need a realtime multi-port capture card to make use of all ports on the card(at same time). Otherwise XtraSense will only take input from one of the ports. A realtime capture card has independent video digitizing hardware for each port so that you can access all ports at same time. It will also display itself as multiple devices in the video device list. For example, a 4 port realtime capture card will appear as 4 independent video capture devices instead of one video device with 4 ports.
A non-realtime capture card has multiple video input ports sharing one piece of digitizing hardware. The manufacturer's software usually use port scan technique to access all ports one by one at a very short interval to simulate a realtime board. In order for XtraSense to access all ports on a non-realtime card, you need to have the special video driver installed just like the MultiCam driver for EureCard Junior 4 card. However, it is not recommended for system with more than 4 cameras. What the special driver does is to switch between ports at regular interval which will cause significant delay when there are many cameras connected.
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A 4 port realtime capture card has 4 independent video processors |
A non-realtime capture card has one video processor shared by all ports |
Recommended Video Capture Card
XtraSense has been tested and tuned to work with Angelo RTV-24 video capture card manufactured by Adlink Technology Inc.
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