People counting with Dahua cameras

Some Dahua cameras can count the audience in the frame. The player can connect to such a camera, receive the counting data and pass it to programmatic advertising as the audience measurement.

Camera setup

The player works only with the ManNumDetection rule. To set it up:

Open the camera admin panel, the Settings tab.
Go to Event > Smart Plan and enable the People Counting option.
Go to Event > People Counting and configure the zone inside which the camera counts the audience.

Player setup

First create 3 variables with the String type for the Frame entity, with the keys dahuaCameraIp, dahuaCameraLogin, dahuaCameraPass.
Open the player page, the Frames tab.
Set these three variables on the desired frame, filling in the login, the password and the IP address of the camera.

How it works

The camera pushes the data itself, so the player does not poll it.
The camera sends data whenever the picture in the frame changes, in the following format:

2026-03-16 16:26:28,937
Content-Length: 452
summary.AreaID=1
summary.Channel=0
summary.EnteredSubtotal.Hour=0
summary.EnteredSubtotal.Today=0
summary.EnteredSubtotal.Total=0
summary.EnteredSubtotal.TotalInTimeSection=0
summary.ExitedSubtotal.Hour=0
summary.ExitedSubtotal.Today=0
summary.ExitedSubtotal.Total=0
summary.ExitedSubtotal.TotalInTimeSection=0
summary.InsideSubtotal.Total=3
summary.PlanId=0
summary.PtzPresetId=0
summary.RuleName=ManNumDetection
summary.UTC=1773678387

The player records the timestamp and the summary.InsideSubtotal.Total parameter.
When programmatic requests the audience, the player takes the maximum value over the previous N seconds, where N is the duration of the programmatic slot. For a 10-second slot the player finds all records not older than 10 seconds, picks the maximum value and sends it.
The maximum value is used so that single zero readings do not lower the result.