struct v4l2_control ctrl; ctrl.id = V4L2_CID_BRIGHTNESS; ctrl.value = 150; // 0..255 ioctl(fd, VIDIOC_S_CTRL, &ctrl);
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class DynexProgram cv::VideoCapture cap; cv::Mat frame, processed; int brightness = 128, zoom = 100; public: bool init(int deviceId) cap.open(deviceId, cv::CAP_DSHOW); // or CAP_V4L2 cap.set(cv::CAP_PROP_FRAME_WIDTH, 1280); cap.set(cv::CAP_PROP_FRAME_HEIGHT, 720); cap.set(cv::CAP_PROP_FOURCC, cv::VideoWriter::fourcc('M','J','P','G')); cap.set(cv::CAP_PROP_BRIGHTNESS, brightness); return cap.isOpened(); struct v4l2_control ctrl; ctrl