Artificial lighting (fluorescent, LED, discharge lamps) can cause flicker, color shifts or rolling bars. To ensure a stable, flicker-free image on all outputs, synchronise the camera’s exposure to the mains frequency and, if needed, lock the shutter time manually.

1 – Set Anti-Flicker Frequency

Why: Matches camera exposure to room lighting frequency to eliminate most flicker.

• OSD menu: MENU ▶ CAMERA ▶ EXPOSURE ▶ Flicker
  
• Web GUI: VIDEO tab ▶ Camera Settings ▶ Exposure ▶ Flicker
  
• Select 50 Hz in 50 Hz regions (Europe).
• Select 60 Hz in 60 Hz regions (North America).

2 – Lock Shutter to Eliminate Residual Bands

Why: Some fixtures still flicker unless shutter time is an exact multiple of the mains cycle.

• After setting Flicker, switch to SAE or Manual exposure mode.
• Lock shutter speed to:
  • 1/100 s when Flicker = 50 Hz
  • 1/60 s when Flicker = 60 Hz

Advanced Flicker Mitigation

If faint bands remain under LED or fluorescent lighting, switch to a fixed shutter:

• Set Exposure Mode to Manual or SAE.
• For 50 Hz lighting → lock shutter to 1/100 s.
• For 60 Hz lighting → lock shutter to 1/60 s.

3 – Verify on All Outputs

Flicker may appear differently on HDMI, SDI, IP or USB. Check each output:

• HDMI/SDI: verify under VIDEO ▶ Output Format.
• IP: verify under VIDEO ▶ Video Encoder.
• USB: controlled via UVC settings in the host application.

USB Anti-Flicker (UVC-controlled)

Why: USB cameras expose flicker settings through the computer’s UVC driver, not the camera menus.

• In Teams or Zoom, the app selects 50 Hz/60 Hz via UVC.
• Some media players (e.g. PotPlayer) offer a “Flicker Reduction” or “Anti-Flicker” option in their video settings.

Quick Checklist

• Set Flicker to the correct mains frequency.
• Lock shutter to 1/100 s or 1/60 s if bands persist.
• Test HDMI, SDI, IP and USB outputs for any remaining flicker.