MJPG Camera Pipeline is Super laggy although it reports it's opening at 30fps

[DaneLLL]

Hi,
Please execute sudo nvpmodel -m 0 and sudo jetson_clocks, and try the two pipelines:
Set camera decoder in OpenCV on Jetson Nano - #6 by DaneLLL
Set camera decoder in OpenCV on Jetson Nano - #8 by DaneLLL

Please modify width,height,format,framerate per your camera.