I have a prototype board of imx6-dualite with ov5640 camera over MIPI and controlled by i2c. Once i start the stream, i want to change the additional features of ov5640 like, gain, exposure etc .. . Since the /dev/videoX node is opened by th gstreamer, how to do this? for resolution change i was thinking of stopping gstreamer and restarting the mfw_v4lsrc with different capture-mode. But for additional controls i can't find anything. How to change the camera features in runtime ?