Excessive latency in camera frames if the fps are high

[fadsamo]

Hello, thank you for your support in launching this great application.
My problem is that when I use a camera, the fps is around 25, but the latency is very high, while after a few seconds from the start of the program, this latency value becomes more and more. I use your tutorial. I installed opencv 4.5.2 cuda enabled on your website, but the problem remains.

[Qengineering]

Dear @fadsamo,

It has to do with the image buffering in OpenCV. I've use the 'simple' way of grabbing a live video, the cap(0) method.
Better to use GStreamer. It has a latency of one frame.
You could look at the website how to stream with GStreamer. However, using the Jetson Nano, this site is your solution.