Usb webcam is not working on vim3 pro ubuntu

VIM3
1

Hi,

Now I am testing a usb web camera(UVC) to vim3 pro for our project.
The model is logitech C920 and the firmware installed version is VIM3_Ubuntu-xfce-bionic_Linux-4.9_arm64_EMMC_V20191231.

For my test the usb camera, I installed the qv4l2. (sudo apt install qv4l2)
and I tried to run the qv4l2 but the qv4l2 is not working with error message.(Segmentation fault)

Please help me to work our camera.

Thanks
sunwki

2

@sunkwi Could you show the full error log info. We don’t know what the problem is.

3

Hi Frank.

Below is log message. if you can test it, please check it.

khadas@Khadas:~$ qv4l2
Using mplane plugin for capture
Using mplane plugin for capture
Segmentation fault.

Now I tested with another uvc test utility “guvcview” then the quvcview works with a camera.
I will test more with it.

Regards
Sunkwi

4

For this error seems you use the wrong video node.You need to specify the correct node for UVC (/dev/video0 or /dev/video1)

qv4l2 -d /dev/videoX

But even specify the corrcet node it seems still can’t work, got Segmentation fault.
I’m not sure what’s going wrong, but it seems related to the OpenGL, VIM3 don’t have X11 GPU support. But quvcview should work.