<layers>
    <visual src="item" />
    <filter name="brightness_contrast" type="brightness_contrast">
        <param name="opacity">1.0</param>
        <param name="brightness" type="anim">
            <duration>0.4</duration>
            <style>inoutquad</style>
            <keyframe at="0.0">0</keyframe>
            <keyframe at="0.2">0.8</keyframe>
            <keyframe at="1.0">0</keyframe>
        </param>
        <param name="contrast">1.0</param>
    </filter>
</layers>