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It is recommended to define the actual frame rate of video signal digitization and then to set up the frame rate for video signals from video surveillance system cameras.

Frame rate setup is to must be done only performed if frame rates of video signal frame rates from one or more cameras do not meet the requirements.

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

1. Configure the video Video surveillance monitor (see Configuring video display on Video Surveillance Monitor section);
2. Enable the debug Debug mode in Axxon PSIM using the tweaki.exe utility (see Tweaki.exe utility for advanced setup of the Axxon PSIM software system, The Settings panel of the Axxon PSIM section).

In Axxon PSIM actual As a result, the current frame rates of the digitized video signals in the debug mode are displayed on the Monitordirectly in the Video surveillance monitor. To define get information about the frame rate of the video signal from a the selected camera, do the following:

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display the Surveillance window corresponding to the selected camera

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in the Video surveillance monitor and activate this window by clicking it with the left mouse button. A window with video signal information is displayed in the upper right corner:

• video stream frame rate (FPS);
• size of the displayed frame in bytes (the parameter can be used, for example, to understand whether the displayed frame is a reference frame or to calculate the average bitrate);
• video stream resolution in pixels.

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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 information about a video stream on top of a video.

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Changing frame

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decimation

By default Axxon PSIM digitizes video signals with the frame rate lower than maximum allowed one. This is caused by the following:

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By default the total frame rate of video signals, which are digitized and processed by the same ADC, is 2 times lower than the maximum allowed one. This ratio is provided by frame groomingdecimation, which allows every second frame to be processed by the program.

Settings allow reducing (total frame rate increases) or increasing (total frame rate decreases) the groomingdecimation.

Frame grooming decimation is changed separately and independently for every ADC.

To change grooming decimation of ADC video signals, do the following:

1. Go to the Hardware tab in the System settings dialog box (1).
2. Select the relevant Video Capture Device object, created before, in the Hardware tab in the objects tree (2). The settings panel for the selected object is displayed in the right part of the Hardware tab.
   
3. If it is necessary to increase the total frame rate up to the maximum allowed value, move the Rate slider to the Max position (3).
4. If it is necessary to reduce the total frame rate to the minimum allowed value, move the Rate slider to the Min position. The minimum total frame rate of video signals, digitized and processed by selected ADC, is 3 times lower than the maximum allowed one.
5. If it is necessary to return the default grooming decimation settings, move the Rate slider to the middle position. The default total frame rate is 2 times lower than the maximum allowed one.
6. Click the Apply button (4).
7. Close the System settings dialog box and restart Axxon PSIM.

Allocation of video capture card’s resources

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To increase the frame rate of the video signal from one or more cameras, do the following:

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For this move Camera objects to parent branches of other Video Capture Devicecapture device objects. The parent Video Capture Devicecapture device object for a Camera object is set by selecting the number of the parent object in the Video Capture Devicecapture device list of settings panel for the Camera object. As a result the Camera object moves to a subdirectory of the selected Video Capture Devicecapture device object.

Example 1. Configuring video signal digitization with the Real time frame rate.

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Initial data. The card has 4 ADCs. They are matched to 4 Video Capture Devicecapture device objects in the objects tree. The video capture card may have up to 16 cameras connected to it. 8 cameras are actually connected to the video capture card. The objects matched to the remaining 8 cameras are disabled. Each of two ADCs, matched to the Video Capture Device capture device 1 and Video Capture Device capture device 2 objects, is configured to digitize the signals from 4 cameras. The ADCs matched to the Video Capture Device capture device 3 and Video Capture Device capture device 4 objects are not configured to digitize signals from any cameras. An example of the objects tree is given in figure A:

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1. Select the Camera 1 object in the objects tree. The settings panel for the selected object is displayed.
2. Select Video Capture Device capture device 3 in the Video Capture Devicecapture device list.
3. Click the Apply button.
4. The Camera 1 object moves to the subdirectory of the Video Capture Device capture device 3 object (see B).
5. Repeat 1-4 steps for the Camera 3 and Camera 4 objects.
6. Select the Video Capture Device capture device 1 object in the objects tree.
7. Make sure that the Speed slider is in the max position.
   If the Speed slider is in the max position, then setup is completed.
   If the Speed slider is in another position, move it to the max position and do 8-10 steps.
8. Click the Apply button.
9. Close the System settings dialog box and restart Axxon PSIM.
10. The frame rate of the selected camera increases up to the Real time rate (for information on testing the frame rate change, see the Actual frame rate section).
11. If the number of connected cameras prevents the configuration of video signal digitization from one of the cameras with the Real time rate (for example, when 15 of 16 allowed cameras are connected), or if the frame rate on several cameras is to be increased simultaneously to the rate, lower than the Real time one, then the cameras, the frame rate of which is to be increased, are allocated between ADCs and they do not exceed the maximum allowable number. The frame rate is increased by as many times, as the number of cameras on ADC is reduced.

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Initial data. The card has 4 ADCs. They are matched to 4 Video Capture Devicescapture devices objects in the objects 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 4 cameras are disabled. Each of 3 ADCs, matched to the Video Capture Device capture device 1, Video Capture Device capture device 2 and Video Capture Device capture device 4 objects, is configured to digitize the signals from 4 cameras. The ADC, matched to the Video Capture Device capture device 3 object, is not configured to digitize the signals from any camera. An example of the objects tree is given in figure A.

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1. Select the Camera 1 object in the objects tree. The settings panel for the selected object is displayed.
2. Select Video Capture Device capture device 3 in the Video Capture Devicecapture device list.
3. Click the Apply button.
4. The Camera 1 object moves to a subdirectory of the Video Capture Device capture device 3 object (B).
5. Repeat 1-4 steps for the Camera 5 object.
6. The frame rate on Camera 1 and Camera 5 increases twofold (for information on testing the frame rate change see the Actual frame rate section).
7. Click the Apply button.

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Let us suppose that Camera 1 has 1/3 queue, and the rest of the cameras are in the common queue. Then the ADC digitizes video signals in the following sequence:  

Camera 1, Camera 2, Camera 3, Camera 1, Camera 4, Camera 2, Camera 1…

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