Jetson nano uses opencv to read camera(CSI/USB camera) frame rate is very low

I use jetson nano to read the image of the camera for each image processing, and when I use cv2.CAP_PROP_FPS, the result is 30 frame rate, but only 10 frames of data when processing. No matter I use the raspberry camera v2 (60 Frame rate) or high frame rate camera (330 frame rate) are all about ten frames of data. How to solve this?


Have you ever run jetson_clock?

I think it is a cache problem, using multithreading should be able to solve this.And is jetson_clock a Official example?

jetson_clock is an official tool to push up system performance.

Thank you