auto_brightness

• Type: Boolean
• Range / Valid values: on, off
• Default: off
• Group: Video Devices

Let motion regulate the brightness of a video device. Only recommended for cameras without auto brightness, Let motion regulate the brightness of a video device. Only recommended for cameras without auto brightness

Motion will try to adjust the brightness of the video device if the images captured are too dark or too light. This option will be most useful for video devices like web cams, which sometimes don't have such an option in hardware.

The auto_brightness feature will adjust the brightness of the device up or down until the value defined by the option brightness is reached (1 = dark, 255 = bright). If brightness is zero auto_brightness will try to adjust to the average brightness level 128.

You need to know if the camera supports auto brightness. Most cameras have auto everything. If your video device already does this for you this option might cause oscillations. If you do not know assume that it has and do not use the Motion auto brightness feature. At least not to start with.