OpenCV application uneven frame times

Hi,
Please refer to steps in Jetson Nano FAQ and check if you can launch the camera in gstreamer command or 12_camera_v4l2_cuda. On Jetson platforms, we would suggest use either software frameworks to achieve better performance. However, not sure if your camera supports general formats such as YUV422.

There are VPI samples listed in
https://docs.nvidia.com/vpi/samples.html
Please also take a look.