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Size of pre-record buffer for one camera, MB = Pre-record time, sec * Frame frequency in the pre-record mode, fps * Frame size, MB.
General memory consumption in the pre-record mode is defined by the sum of values for each camera.
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Example. The camera performs pre-recording for 15 seconds with a hot record speed of 25 fps. The size of the 500-frame fragment is 20 MB. It is required to define the size of the pre-record buffer for such a camera. First, it is necessary to define the average frame size: Frame size = Fragment size / 500 = 20 MB/500 frames = 0.04 MB. So, the size of the pre-record buffer is: The memory consumption in the pre-record mode for one camera, MB = Pre-record time, sec * Frame frequency in the pre-record mode, fps * Frame size, MB = 15 sec * 25 fps * 0.04 MB = 15 MB. |
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