You can change the frame interval by changing the value of
ColorCameraSettings.FrameInterval
property.
You have to make sure the AutoExposure property is set to false while working with FrameInterval; otherwise there will have no effects on the frames.
Use this like :
this.sensor.ColorStream.CameraSettings.FrameInterval = 12
I did a post over here couple of months back,
How to control the frame interval of Kinect color data stream? [
^]
Hope this will help you !