question

@yhc-1262 please take a look at Kinect Hardware Specs: https://docs.microsoft.com/en-us/azure/Kinect-dk/hardware-specification#color-camera-supported-operating-modes

"and can be used without the Sensor SDK.", so i used opencv.
but frame-rates maybe fixed..then, 2048*1536 images can 30fps(4:3)... what different?

 cv::VideoCapture capture0(0);
 cv::VideoCapture capture1(1);
 capture0.set(cv::CAP_PROP_FRAME_WIDTH, 1920);
 capture0.set(cv::CAP_PROP_FRAME_HEIGHT, 1080);
 capture1.set(cv::CAP_PROP_FRAME_WIDTH, 1920);
 capture1.set(cv::CAP_PROP_FRAME_HEIGHT, 1080);
 cv::Mat frame0, frame1;
    
 unsigned int i = 120;
 unsigned int elapsed = 0;
 while(i--) {
   std::chrono::steady_clock::time_point begin = std::chrono::steady_clock::now();
   capture0 >> frame0;
   capture1 >> frame1;
   imshow("RGB camera0", frame0);
   imshow("RGB camera1", frame1);
   std::chrono::steady_clock::time_point end = std::chrono::steady_clock::now();
   elapsed = std::chrono::duration_cast<std::chrono::microseconds> (end - begin).count();
   std::cout << "Time difference = " << elapsed << "[us]" << std::endl;
 }