Using visionworks for camera input

Autonomous Machines Jetson & Embedded Systems Jetson TK1
1

Hi,

All the examples of visionworks working fine. But i want camera as a input for my example and i am facing issues.Anyone please provide me any solutions for this.

2

Hi,

Thanks for your question.

For on-board camera, please use --source=“device:///nvcamera?index=0”
For usb camera, please use --source=“device:///v4l2?index=1”

Please find details in Visionworks’ document
Document is located at /usr/share/visionworks/docs on device
Or just download it at Vision Programming Interface (VPI) | NVIDIA Developer

3

Hi,

We are using Apalis TK1 board with jetpack install.I am trying visionworks sample player example with usb camera input but it is not working with --source=“device:///v4l2?index=1”.

4

Hi,

Please modify the index number with id of your camera and try it again.

Thanks.

5

Hi,

I am using this usb camera path --source=“/devices/platform/tegra-xhci/usb1/1-3/1-3.3/1-3.3:1.0/input/input1”

Thanks

6

Hi,

It is v4l2 index.

For example, I connect a Logitech usb camera and when I execute

cat /dev/v4l/by-id/*

I got:
cat: /dev/v4l/by-id/usb-046d_Logitech_Webcam_C930e_AD9E226E-video-index0

So I should open camera by

nvx_demo_feature_tracker --source="device:///v4l2?index=0"
7

Yes its working fine. But i am using this input for motion_measurement example for pedestrian detection but using camera it is showing arrow symbol everywhere but in video it is working with only pedestrians.

Thanks

8

Hi,

There are some tuning parameters.
Please read more in our document.

Thanks.

9

Does Vision works camera api supports GiGE or IP camera ?

10

Hi,

VisionWorks officially supports following input format:

    [*]Video [*]Image [*]Image sequence [*]V4L2 camera [*]NVIDIA camera

For GiGE or IP camera, you can give it a try but not in our support scope.
Thanks.