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If the number of cameras connected to a video capture card is less than their maximum number, then you can reallocate them between ADCs of a video capture card. For this, those cameras whose frame rate you want to increase are allocated separately to one ADC or allocated in a number that is less than the maximum allowable one. Cameras allocated to a given ADC that aren't subject to strict frame rate requirements are reallocated to other ADCs.

An example of the allocating cameras to ADCs is shown in the figure.

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To do this, place the selected camera in the priority process queue.

An example of the reallocation of resources of one ADC between cameras is shown in the figure below.

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Operation modes of the video capture cards’ ADC

ADC operation mode is defined determined by the number of processed and digitized video signals. There are two modes:

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To disable the Camera objects that correspond to the idle video channels in Axxon PSIM, do the following:

1. Define Determine the numbers of the idle video capture channels (taking into account BNC plug numbering).
2. Go to the Hardware tab in the System settings window.
3. In the object tree on the Hardware tab, select the Camera object created before, with the same channel number as the BNC plug (idle channel). The settings panel for the selected object is displayed on the right of the Hardware tab.
4. Make sure that video signal isn't displayed in the video surveillance window (1).
   
   The display of the video signal in the video field indicates that the Camera object matches another video channel.
5. Specify the number of the video channel in the Channel number drop-down list on the Basic settings tab (2). Match the Camera object with the channel number, which corresponds to the BNC plug number and the Camera object number, or scan for a Camera object matched with the required channel number.
6. Set the Disable checkbox (3).
7. Click the Apply button.

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Actual frame rate

We recommend defining determining the actual frame rate of video signal digitization and then setting up the frame rate for video signals from video surveillance system cameras.

You must perform frame rate setup if frame rates of video signals from one or more cameras don't meet the requirements.

Actual frame rates are defined determined for each camera individually.

To define specify the actual frame rate for a selected camera, do the following:

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Note that this information window displays initial data about the video stream from the camera or from the archive transmitted to the Video surveillance monitor. The actual displayed frame rate of the video stream can be different, see Displaying Display of information about a video stream on top of a video.

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Task. Video signals on Camera 1 and Camera 5 must be digitized with an increased frame rate.

Initial data. The card has four ADCs. They are matched to four Video capture device objects in the object tree. The video capture card may have up to 16 cameras connected to it. 12 cameras are actually connected to the video capture card. The objects matched to the remaining four cameras are disabled. Each of the three ADCs, matched to the Video capture device 1, Video capture device 2, and Video capture device 4 objects, is configured to digitize the signals from four cameras. The ADC, matched to the Video capture device 3 object, isn't configured to digitize the signals from any camera. An example of the object tree is given in figure A.

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