ANPR questions & answers
Answers for the systems around number-plate recognition.
Practical, vendor-neutral guidance for cameras, NVRs, VMS platforms, access control and metadata integrations.
These are general industry answers, not product support. Setting up ANPR Edge? Read the camera connection guide.
4 answerin VMS
Why is my Milestone XProtect LPR server CPU usage hitting 100%?
High CPU usage on a Milestone XProtect LPR server is almost always caused by processing H.264 or H.265 compressed video streams. Milestone requires the LPR engine to decode these complex compression formats before analyzing the plates, which quickly overloads the server's processing capacity and causes dropped frames.
Milestone XProtect LPR Administrator Manual
Why is my Avigilon ACC/Unity LPR watch list CSV import failing?
Avigilon Unity and ACC require a very specific CSV formatting structure to successfully import a database of watch list plates. The most common cause of complete import failure is omitting the mandatory "Minimum Confidence" column, which tells the VMS how strict the OCR match must be before triggering a security rule.
Avigilon Unity Video Client User Guide - LPR Watch Lists
Why are Wisenet WAVE LPR bookmarks playing back at the wrong time?
If clicking an LPR event bookmark in the Wisenet WAVE client jumps the video playback to a timestamp completely devoid of a vehicle, you are experiencing a severe clock synchronization mismatch. The VMS server and the edge cameras are operating on different clocks.
Hanwha Vision: Synch issue between playback time and camera time
Why does the Wisenet WAVE AI Plugin freeze or drop streams?
When utilizing the WAVE AI Plugin, adjusting the "AI Tracking Speed" too high exponentially increases the computational burden on the server. Setting the tracking speed to "Very Fast" for vehicles can severely reduce the number of AI streams the server can handle, leading to dropped frames and system freezing.
WAVE: How to Setup the AI Plugin
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