I just contact OpenCV, don't understand, now can use OpenCV to open the camera and take photos, but in a CV_CAP_PROP_BRIGHTNESS, CV_CAP_PROP_EXPOSURE OpenCV bring function such as setting up the camera parameters, no reaction, want to use the CV_CAP_PROP_SETTINGS to try, but call CV_CAP_PROP_SETTINGS after open the properties, the camera picture is still no response, great god advice for all of you!!!!!!!!!!!!!!! Please everyone a great god give directions!!!!!!!!!!!!!!