Affected Roles: System Owner • System Administrator • Advanced Viewer • Viewer
Related Nx VMS Apps: Nx Server • Nx Desktop
Applicable Nx Witness Version: v3.2
What's the issue?
In Nx Witness 3.2, in July 2018, Network Optix introduced in-camera analytics support for the Hikvision DS-2CD4A26FWD-IZ/P LPR camera.
Using this feature operators can create rules in the Rules Engine using LPR events (Blacklist, Whitelist, other, etc.).
For example, operators can create a rule using the LPR events to create a Bookmark as an action and then later be able to search Bookmarks for identified license plates (see image below).
Since the original integration Hikvision has updated their firmware and have added additional information to the license plate that could not be passed to Nx Witness.
This additional information caused LPR events to become blocked and actions assigned to the LPR events were not longer executed.
How to resolve the issue:
Although the issue will be addressed in v4.0 of Nx Witness VMS, in v3.2 the only way to work around this issue is to downgrade the camera firmware to v5.4.5 170519. Follow the steps below.
- Download v5.4.5 170519 firmware.
- Follow the video below from Hikvision USA to downgrade the firmware on the camera.
- In some cases, it is required to downgrade in small steps and you can go downwards (or upwards) multiple versions. Please consult the supplier of your Hikvision LPR camera for the best practice.