E-mail delayed on analytics detection

Completed

Lorenz

January 06, 2025 08:45

Hi all,

We recently installed a Vivotek FD9387-FR-v2 camera with the analytics plugin on an existing  NX Witness 5.1.5.39242 setup.

When the analytics of the camera is recognizing a face in the camera, NX Witness is sending an e-mail.

But there seems to be some delay. The screenshot we receive is not the moment when the camera does the detection but 1 or 2 seconds later. Even if we play with the interval of the action, we can't get the right screenshot.

In the advanced tab of the camera, you see a small clip playing at each detection (for approx 2 seconds). Is there no possibility to send this clip by mail? Or to send a more accurate image?

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  Norman

  • Network Optix team

  January 06, 2025 13:23

  Hi Lorenz,

  I recommend checking the GOP (Group of Pictures) settings on the camera. The VMS selects the nearest key frame to generate snapshots. By adjusting the GOP to shorten the interval between key frames, you increase the likelihood of capturing the correct frame.

  In my test environment, I have a VIVOTEK device (FD9165-HT) configured with a key frame interval of 1 second—referred to as the "Intra Frame Period" in the VIVOTEK interface, and the correct frame is provided in case of an event.

  Please note that, by default, it isn't possible to retrieve the accompanying clip through email events.

  Let us know if you need further assistance!

  Best regards.

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  Vincent INEO

  January 06, 2025 14:50

  Hi Lorenz

  How did you set the time of your camera and server ? Do you use a NTP server ? Do you have the exact same time between the camera and server ?

  And I agree with Norman for the GOP settings, you have to reduce it for more "real" images.

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