Optionaladaptation'smooth' (default) or 'instant'; the first frame always snaps
OptionalcompensationEV offset on the metered exposure, -8..8 (default: 0; +1 = twice as bright)
OptionalenabledTurns auto exposure on (default: false)
OptionalmaxBrightest metered exposure in EV, -16..16, at least minEv (default: 4)
OptionalminDarkest metered exposure in EV, -16..16 (default: -4; EV 0 = average luminance 0.18)
OptionalspeedAdaptation speed toward a darker scene, 0..100 per second (default: 1)
OptionalspeedAdaptation speed toward a brighter scene, 0..100 per second (default: 3)
Auto exposure settings; omitted fields keep their current value.