Jetson Nano-detectnet-camera with webcam(C920)

Robotics & Edge Computing Jetson & Embedded Systems Jetson Nano
1

I’m trying to get the “Running the Live Camera Detection Demo” running but this is my first time using these systems and the instructions for this demo are a little less defined than the previous ones.

Could someone walk me through the steps I need to take to get this working with a Logitech C920?

2

Hi RD4511,

Please change the DEFAULT_CAMERA define at the top of detectnet-camera.cpp to reflect the /dev/video V4L2 device of your USB camera and recompile.

See also: [url]https://devtalk.nvidia.com/default/topic/1030672/jetson-tx2/change-camera-on-jetson-tx2/post/5243917/#5243917[/url]

Thanks

3

Ok thank you, needed to recompile.

4

hello, I see that on one forum, some people are changing the DEFAULT_CAMERA to 0, some change it to 1, how do we know which on to change?

5

It depends on the index of the /dev/video node that you want to use:
(i.e. define DEFAULT_CAMERA 0 for /dev/video0 or define DEFAULT_CAMERA 1 for /dev/video1, ect.)

If you also have an onboard MIPI CSI camera plugged in, that will come up as /dev/video0. In that case, /dev/video1 would be your USB camera.

You can list the cameras you have connected in V4L2 with the v4l2-ctl utility:

$ sudo apt-get install v4l-utils
$ v4l2-ctl --info --list-devices