Hikvision LPR Camera Integration time synchronisation problem
Answered
We have setup the Hikvision LPR camera integration and have been able to get it setup correctly apart from the problem of time synchronisation.
All the devices are showing the same time i.e. Camera, Server and client. When you look at the trigger time and the camera time there is a 6 second difference.
When the thumbnail is displayed there is no vehicle let alone a number plate. This is the same on the events, email and desktop notifications
Any ideas where we are going wrong?
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I've recently completed an install with the same. My resolve was to play with the pre-record time on motion of that camera, along with the bookmark/notification. I set it this way so when we clicked on the book mark, it showed the vehicle approaching the plate was captured. Client like dit due to being able see the vehicle, what direction it came from etc, prior to the plate capture. We found it worked really well this way. Not saying this is the answer to your problem- just what we experienced. Cheers from NZ.
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Hi Tony McLeish,
As Glynn Thomas mentioned, often it is a matter of fine-tuning with the pre- and post-record settings, since it might vary a bit depending on the network and the speed of the vehicle.
If you want to be sure, it would be interesting to track the communication between camera and server with Wireshark to see when the license plate is captured and when the action is made.
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Hi Tony McLeish,
The reason is that the license plate data doesn't necessarily align 100% with the footage due to the processing power of the cameras and/or the speed of the cars that are being captured.
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Hi Tony McLeish,
I do not know, but I assume their proprietary and not disclosed API?
I have created a task for our developers to investigate if there is a way to improve this integration.JIRA-VMS-20051
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HI Alexis Zenios,
I wish I had better news, other than "they are working on it".
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Hi Alexis Zenios,
Can you tell me if the issue is still relevant?
If so, can you please tell me which version of Nx you are using and which firmware for the Hikvision camera you are using?
Over time, there have been substantial modifications to the timestamp juggling we’re forced to do with Hikvision metadata and events. The latest version of Nx is 4.1.0.32405. You can upgrade to this latest version with:
Build Number: 32405
Password: h985lc -
Hi Alexis Zenios,
After the release of 4.2, there will be an improvement for the LPR accuracy in one of the first 4.2_patches.
Please keep an eye on the release notes.
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