The Reolink cameras will automatically drop the frame rate to 12 fps during the nighttime to ensure enough exposure time. However, that might result in an overexposed image or "ghost image" sometimes. To solve this problem, you can set a fixed frame rate for your camera to make the image clearer at night.
Applies to: All Reolink cameras that support smart (person/vehicle) detection exclude battery-powered cameras.
Note: If you cannot find access to set a fixed frame rate for your smart camera, please upgrade the camera's firmware to the latest version.
On the Reolink App, go to Device Settings > Display > Stream > Frame Rate Mode.
If you don't want the frame rate to change, select Constant. Otherwise, select Gradual.