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That's not a HikVision thing, you just can't rely on camera motion detection for external cameras for any brand.
Be interesting to see how AcuSense does, trying to workout if pixel changes represent a real security threat or not.
A more robust solution would be a separate PIR sending a signal to one of the alarm channels in the NVR. You'd still get occasional false positives, but they'd be much less often. |
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