Problem
A 30 fps camera records under 60 Hz lighting with a shutter that should be compatible but a low-cost LED driver still produces rolling bands.
Solution
Root Cause / Diagnostic:
Low-cost LED drivers produce severe harmonic ripple and fluctuating voltage regulation under AC loads. Even when shooting at 30 fps with a 1/60s shutter, the driver's dirty DC output modulates at irregular frequencies that roll across rolling-shutter lines.
Actionable Fix:
1. Adjust the camera shutter speed to fine-fractional increments (e.g., 1/59.94s to 1/61.2s) using extended clear scan mode until bands stabilize.
2. Replace dirty AC power supplies with filtered DC battery power (V-Mount or NP-F battery plates) to feed pure DC current to LED lights.
3. Inspect flat wall surfaces on the camera monitor at high contrast to confirm zero moving bands.
Pro Tip:
Powering LED fixtures from high-quality DC batteries completely bypasses AC mains ripple, eliminating driver flicker instantly.
Low-cost LED drivers produce severe harmonic ripple and fluctuating voltage regulation under AC loads. Even when shooting at 30 fps with a 1/60s shutter, the driver's dirty DC output modulates at irregular frequencies that roll across rolling-shutter lines.
Actionable Fix:
1. Adjust the camera shutter speed to fine-fractional increments (e.g., 1/59.94s to 1/61.2s) using extended clear scan mode until bands stabilize.
2. Replace dirty AC power supplies with filtered DC battery power (V-Mount or NP-F battery plates) to feed pure DC current to LED lights.
3. Inspect flat wall surfaces on the camera monitor at high contrast to confirm zero moving bands.
Pro Tip:
Powering LED fixtures from high-quality DC batteries completely bypasses AC mains ripple, eliminating driver flicker instantly.