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The video archive depth for each camera is calculated every 15 minutes by the Agent of Control.

An archive alarm is generated when the following two conditions are met simultaneously:

  • "Current video archive depth" < "Keep archive for (days)";
  • ("Current date" - "Camera connection date") > "Keep archive for (days)".
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An example of calculating the current video archive depth:

Suppose that the following parameters for "Camera 1" were set when the list of cameras was configured (see Configuring the camera list):

  • Keep archive for (days) = 7
  • Gaps in the archive (days) = 1
  • Camera connection date = 20.04.2020

Suppose that at the time of the current date 12.05.2020, the video was recorded to the archive on the following days: 20.04, 21.04, 22.04, 28.04, 30.04, 07.05, 08.05. That is, the total archive size = 7 days (the Total, days field).

The size of the current video archive depth (the Current, days field) is calculated as follows:

  • In the date range from "Current date - X" to "Current date", the search is performed for days on which the archive was recorded, where X is the number of days = Keep archive for (days) + Gaps in the archive (days) + 1. In the current example X = 7 + 1 + 1 = 9 (the Period, days field).
  • In the date range 04.05.2020 - 12.05.2020 (for the last 9 days), the archive is present only on 07.05.2020 and 08.05.2020.

Thus, the video archive depth for "Camera 1" = 2 days (the Current, days field).

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