Confirm Vivotek Night Vision Failure Symptom
Your Vivotek camera shows colour video during daylight but switches to monochrome or black-and-white in low light. This is typically caused by IR cut filter malfunction, SNV technology misconfiguration, or IR LED hardware failure. Verify the issue is not due to lens fog or poor video quality by checking the VMS dashboard for consistent stream health during both lighting conditions.
Quick Checks for Vivotek Night Vision Issues
Perform these 30-second checks first:
- Verify VMS dashboard status: Check if the camera shows 'offline' or 'stream error' in VAST Security Station
- Check PoE link light: Ensure the switch port shows a solid green light (802.3af Class 3)
- Ping the camera IP: Use
ping -c 4 [camera_ip]to confirm network connectivity - Inspect status LED: Look for rapid blinking or no light on the camera's front panel
- Cycle PoE power: Disable then re-enable the switch port for 10 seconds
Your Network Configuration Checks
Check VLAN Assignment
Ensure the camera is on the correct VLAN in VAST. Navigate to Network > VLAN Configuration and verify the VLAN ID matches the switch port's configuration. If using multiple VLANs, confirm the camera's VLAN Priority is set to 10 for video traffic.
Validate PoE Budget
Access the switch's management interface and check the power budget for the camera's port. For the FD9391-EHTV, ensure the port is allocated at least 15.4W (802.3af). If the switch shows Class 0, verify the cable is Cat6 or higher and the PoE injector is functioning.
Check DHCP Lease
In VAST, go to Network > DHCP Management and ensure the camera has a valid lease. If the lease is exhausted, renew it or expand the DHCP scope to include the camera's IP range. Use the DHCP Lease Report tool to identify conflicts.
Verify Multicast Settings
Navigate to Network > Multicast Configuration in VAST. Ensure IGMP Snooping is disabled for the camera's VLAN. If enabled, the camera may fail to receive multicast streams required for night vision analytics.
Resolve Vivotek-Specific Night Vision Issues
Check SNV Technology Settings
Access the camera's web interface and go to Configuration > Video > Night Vision. Ensure SNV Mode is enabled. Verify the IR Cut Filter is set to 'Auto' and the IR LED Brightness is at 100%. For the FE9391-EV, check that the Dewarping Mount Type matches the actual installation (ceiling/wall/floor).
Test Smart VCA Rules
In the camera's web interface, navigate to Configuration > VCA. Ensure Intrusion Detection and Loitering Analytics are enabled. Disable all rules temporarily to rule out conflicts with night vision processing. Re-enable one rule at a time to identify any interference.
Inspect IR LED Hardware
Use the Video Quality Diagnostics tool in VAST to capture a night vision test image. Look for missing IR LEDs or uneven illumination. If the camera shows IR Reflection from nearby surfaces, adjust the mounting position to avoid reflective materials like glass or metal.
Verify ONVIF/RTSP Settings
In VAST, go to Cameras > [device] > RTSP Settings. Ensure the Stream Profile is set to '4K' for the FD9391-EHTV. Test the RTSP URL directly using ffplay rtsp://[username]:[password]@[camera_ip]:554/Streaming/Channels/101 to confirm night vision streams are functional.
Advanced Troubleshooting for Vivotek
Perform Packet Capture
Use the Network Diagnostics tool in VAST to capture packets on the camera's switch port. Look for UDP packets on port 554 (RTSP) and port 9000 (ONVIF). If packets are missing during night vision mode, there may be a firewall blocking specific ports or a switch port misconfiguration.
Repair VMS Database
If the camera appears in VAST but shows no night vision data, navigate to System > Database > Health Check. Run the VMS Database Repair Tool to fix any inconsistencies. If the repair fails, export the camera's configuration and re-import it after a system reboot.
Escalate to Manufacturer Support
If all steps fail, submit a support ticket via https://vivotek.zendesk.com with: 1) VAST system health report 2) Packet capture 3) Firmware version 4) VMS logs. Include the Vivotek SNV diagnostic report from the camera's web interface under Configuration > Video > Night Vision.
Understand Root Causes
Enterprise Network Issues
PoE budget exhaustion on the switch port can disable night vision features. Verify the switch port is not over-subscribed. DHCP scope exhaustion may prevent the camera from acquiring an IP address. For UK-specific issues, ensure the camera is not behind Foil-backed insulation or Low-E coated windows which block IR signals.
VMS Licensing Conflicts
If the VMS shows a 'licensing error', check the VAST Subscription Manager for expired licenses. Re-apply the license key for the camera's model. For the ND9541P NVR, verify the Channel License includes night vision analytics.
Firmware Incompatibility
Ensure the camera is on the latest firmware version from the Vivotek Firmware Channel. If using beta firmware, rollback to stable version. For the SD9384-EHL PTZ, check if the firmware supports the camera's specific IR LED configuration.
Preventive Maintenance
Schedule Firmware Updates
In VAST, configure Firmware Update Schedules to automatically apply updates during off-peak hours. Use the Staged Deployment feature to test updates on a subset of cameras before full rollout.
Monitor Network Health
Set up SNMP Alarms in VAST for PoE budget thresholds and VLAN misconfigurations. Use the QoS Policy Manager to prioritise video traffic on the camera's VLAN. Regularly check for IR Reflection using the Video Quality Diagnostics tool.
Full disclosure: we built scOS to address exactly this the complexity of managing enterprise camera fleets across VLANs. scOS uses permanently powered cameras connected via ethernet.
Replacement Considerations
If troubleshooting exceeds 30 minutes without resolution, consider replacement. For the FD9391-EHTV, expect 5-8 years of lifespan with proper maintenance. Surveillance-rated HDDs in the ND9541P NVR last 3-5 years. UK consumers have up to 6 years to claim faulty goods under the Consumer Rights Act 2015 (5 years in Scotland).