[JETPACK 4.2] Jetson TX2 with Logitec C920 Camera - ERROR

Hi everyone,

I have just recently installed jetpack 4.2 on my Jetson TX2 board however when I try out to read the the Logitec C920 Camera i was not able to read it.

#include <iostream>

#include <opencv2//opencv.hpp>
#include <opencv2/videoio/videoio.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>

int main()
{
 

    cv::VideoCapture cap(1);
    if(!cap.isOpened()) {
		std::cout<<"Failed to open camera."<<std::endl;
		return (-1);
    }
    
    unsigned int width  = cap.get(CV_CAP_PROP_FRAME_WIDTH); 
    unsigned int height = cap.get(CV_CAP_PROP_FRAME_HEIGHT); 
    unsigned int fps    = cap.get(CV_CAP_PROP_FPS);
    unsigned int pixels = width*height;
    unsigned int format = cap.get(CV_CAP_PROP_FORMAT);	
    std::cout <<"Frame size : "<<width<<" x "<<height<<", "<<pixels<<" Pixels "<<fps<<" FPS"<<std::endl;
    std::cout <<"Format : " << format <<std::endl;	

    cv::Mat frame_in;
    cap.read(frame_in);
    //imshow("image",frame_in);
    cap.release();
    return 0;

}

the result output is :

ian@jetsontx2:~/OpenCvExample/build$ ./cv_camera
Frame size : 176 x 144, 25344 Pixels 15 FPS
Format : 16
VIDIOC_STREAMON: Input/output error
ian@jetsontx2:~/OpenCvExample/build$ ./cv_camera
Frame size : 176 x 144, 25344 Pixels 15 FPS
Format : 16
VIDIOC_STREAMON: Protocol error
ian@jetsontx2:~/OpenCvExample/build$ ./cv_camera
VIDEOIO ERROR: V4L2: Pixel format of incoming image is unsupported by OpenCV
OpenCV Error: Unspecified error (GStreamer: unable to start pipeline
) in cvCaptureFromCAM_GStreamer, file /home/nvidia/build_opencv/opencv/modules/videoio/src/cap_gstreamer.cpp, line 887
VIDEOIO(cvCreateCapture_GStreamer(CV_CAP_GSTREAMER_V4L2, reinterpret_cast<char *>(index))): raised OpenCV exception:

/home/nvidia/build_opencv/opencv/modules/videoio/src/cap_gstreamer.cpp:887: error: (-2) GStreamer: unable to start pipeline
in function cvCaptureFromCAM_GStreamer

Failed to open camera.
ian@jetsontx2:~/OpenCvExample/build$

I really don’t understand the error as I can run this same code in the Jetson Nano.

ian@jetsontx2:~/OpenCvExample/build$ v4l2-ctl -d /dev/video1 --list-formats-ext
ioctl: VIDIOC_ENUM_FMT
Index : 0
Type : Video Capture
Pixel Format: ‘YUYV’
Name : YUYV 4:2:2
Size: Discrete 160x90
Interval: Discrete 0.050s (20.000 fps)
Interval: Discrete 0.067s (15.000 fps)
Interval: Discrete 0.100s (10.000 fps)
Interval: Discrete 0.133s (7.500 fps)
Interval: Discrete 0.200s (5.000 fps)
Size: Discrete 160x120
Interval: Discrete 0.067s (15.000 fps)
Interval: Discrete 0.100s (10.000 fps)
Interval: Discrete 0.133s (7.500 fps)
Interval: Discrete 0.200s (5.000 fps)
Size: Discrete 176x144
Interval: Discrete 0.067s (15.000 fps)
Interval: Discrete 0.100s (10.000 fps)
Interval: Discrete 0.133s (7.500 fps)
Interval: Discrete 0.200s (5.000 fps)

Index       : 1
Type        : Video Capture
Pixel Format: 'H264' (compressed)
Name        : H.264
	Size: Discrete 640x480
		Interval: Discrete 0.033s (30.000 fps)
		Interval: Discrete 0.042s (24.000 fps)
		Interval: Discrete 0.050s (20.000 fps)
		Interval: Discrete 0.067s (15.000 fps)
		Interval: Discrete 0.100s (10.000 fps)
		Interval: Discrete 0.133s (7.500 fps)
		Interval: Discrete 0.200s (5.000 fps)
	Size: Discrete 160x90
		Interval: Discrete 0.033s (30.000 fps)
		Interval: Discrete 0.042s (24.000 fps)
		Interval: Discrete 0.050s (20.000 fps)
		Interval: Discrete 0.067s (15.000 fps)
		Interval: Discrete 0.100s (10.000 fps)
		Interval: Discrete 0.133s (7.500 fps)
		Interval: Discrete 0.200s (5.000 fps)
	Size: Discrete 160x120
		Interval: Discrete 0.033s (30.000 fps)
		Interval: Discrete 0.042s (24.000 fps)
		Interval: Discrete 0.050s (20.000 fps)
		Interval: Discrete 0.067s (15.000 fps)
		Interval: Discrete 0.100s (10.000 fps)
		Interval: Discrete 0.133s (7.500 fps)
		Interval: Discrete 0.200s (5.000 fps)
	Size: Discrete 176x144
		Interval: Discrete 0.033s (30.000 fps)
		Interval: Discrete 0.042s (24.000 fps)
		Interval: Discrete 0.050s (20.000 fps)
		Interval: Discrete 0.067s (15.000 fps)
		Interval: Discrete 0.100s (10.000 fps)
		Interval: Discrete 0.133s (7.500 fps)
		Interval: Discrete 0.200s (5.000 fps)
	Size: Discrete 320x180
		Interval: Discrete 0.033s (30.000 fps)
		Interval: Discrete 0.042s (24.000 fps)
		Interval: Discrete 0.050s (20.000 fps)
		Interval: Discrete 0.067s (15.000 fps)
		Interval: Discrete 0.100s (10.000 fps)
		Interval: Discrete 0.133s (7.500 fps)
		Interval: Discrete 0.200s (5.000 fps)
	Size: Discrete 320x240
		Interval: Discrete 0.033s (30.000 fps)
		Interval: Discrete 0.042s (24.000 fps)
		Interval: Discrete 0.050s (20.000 fps)
		Interval: Discrete 0.067s (15.000 fps)
		Interval: Discrete 0.100s (10.000 fps)
		Interval: Discrete 0.133s (7.500 fps)
		Interval: Discrete 0.200s (5.000 fps)
	Size: Discrete 352x288
		Interval: Discrete 0.033s (30.000 fps)
		Interval: Discrete 0.042s (24.000 fps)
		Interval: Discrete 0.050s (20.000 fps)
		Interval: Discrete 0.067s (15.000 fps)
		Interval: Discrete 0.100s (10.000 fps)
		Interval: Discrete 0.133s (7.500 fps)
		Interval: Discrete 0.200s (5.000 fps)
	Size: Discrete 432x240
		Interval: Discrete 0.033s (30.000 fps)
		Interval: Discrete 0.042s (24.000 fps)
		Interval: Discrete 0.050s (20.000 fps)
		Interval: Discrete 0.067s (15.000 fps)
		Interval: Discrete 0.100s (10.000 fps)
		Interval: Discrete 0.133s (7.500 fps)
		Interval: Discrete 0.200s (5.000 fps)
	Size: Discrete 640x360
		Interval: Discrete 0.033s (30.000 fps)
		Interval: Discrete 0.042s (24.000 fps)
		Interval: Discrete 0.050s (20.000 fps)
		Interval: Discrete 0.067s (15.000 fps)
		Interval: Discrete 0.100s (10.000 fps)
		Interval: Discrete 0.133s (7.500 fps)
		Interval: Discrete 0.200s (5.000 fps)
	Size: Discrete 800x448
		Interval: Discrete 0.033s (30.000 fps)
		Interval: Discrete 0.042s (24.000 fps)
		Interval: Discrete 0.050s (20.000 fps)
		Interval: Discrete 0.067s (15.000 fps)
		Interval: Discrete 0.100s (10.000 fps)
		Interval: Discrete 0.133s (7.500 fps)
		Interval: Discrete 0.200s (5.000 fps)
	Size: Discrete 800x600
		Interval: Discrete 0.033s (30.000 fps)
		Interval: Discrete 0.042s (24.000 fps)
		Interval: Discrete 0.050s (20.000 fps)
		Interval: Discrete 0.067s (15.000 fps)
		Interval: Discrete 0.100s (10.000 fps)
		Interval: Discrete 0.133s (7.500 fps)
		Interval: Discrete 0.200s (5.000 fps)
	Size: Discrete 864x480
		Interval: Discrete 0.033s (30.000 fps)
		Interval: Discrete 0.042s (24.000 fps)
		Interval: Discrete 0.050s (20.000 fps)
		Interval: Discrete 0.067s (15.000 fps)
		Interval: Discrete 0.100s (10.000 fps)
		Interval: Discrete 0.133s (7.500 fps)
		Interval: Discrete 0.200s (5.000 fps)
	Size: Discrete 960x720
		Interval: Discrete 0.033s (30.000 fps)
		Interval: Discrete 0.042s (24.000 fps)
		Interval: Discrete 0.050s (20.000 fps)
		Interval: Discrete 0.067s (15.000 fps)
		Interval: Discrete 0.100s (10.000 fps)
		Interval: Discrete 0.133s (7.500 fps)
		Interval: Discrete 0.200s (5.000 fps)
	Size: Discrete 1024x576
		Interval: Discrete 0.033s (30.000 fps)
		Interval: Discrete 0.042s (24.000 fps)
		Interval: Discrete 0.050s (20.000 fps)
		Interval: Discrete 0.067s (15.000 fps)
		Interval: Discrete 0.100s (10.000 fps)
		Interval: Discrete 0.133s (7.500 fps)
		Interval: Discrete 0.200s (5.000 fps)
	Size: Discrete 1280x720
		Interval: Discrete 0.033s (30.000 fps)
		Interval: Discrete 0.042s (24.000 fps)
		Interval: Discrete 0.050s (20.000 fps)
		Interval: Discrete 0.067s (15.000 fps)
		Interval: Discrete 0.100s (10.000 fps)
		Interval: Discrete 0.133s (7.500 fps)
		Interval: Discrete 0.200s (5.000 fps)

Index       : 2
Type        : Video Capture
Pixel Format: 'MJPG' (compressed)
Name        : Motion-JPEG
	Size: Discrete 640x480
		Interval: Discrete 0.033s (30.000 fps)
		Interval: Discrete 0.042s (24.000 fps)
		Interval: Discrete 0.050s (20.000 fps)
		Interval: Discrete 0.067s (15.000 fps)
		Interval: Discrete 0.100s (10.000 fps)
		Interval: Discrete 0.133s (7.500 fps)
		Interval: Discrete 0.200s (5.000 fps)
	Size: Discrete 160x90
		Interval: Discrete 0.033s (30.000 fps)
		Interval: Discrete 0.042s (24.000 fps)
		Interval: Discrete 0.050s (20.000 fps)
		Interval: Discrete 0.067s (15.000 fps)
		Interval: Discrete 0.100s (10.000 fps)
		Interval: Discrete 0.133s (7.500 fps)
		Interval: Discrete 0.200s (5.000 fps)
	Size: Discrete 160x120
		Interval: Discrete 0.033s (30.000 fps)
		Interval: Discrete 0.042s (24.000 fps)
		Interval: Discrete 0.050s (20.000 fps)
		Interval: Discrete 0.067s (15.000 fps)
		Interval: Discrete 0.100s (10.000 fps)
		Interval: Discrete 0.133s (7.500 fps)
		Interval: Discrete 0.200s (5.000 fps)
	Size: Discrete 176x144
		Interval: Discrete 0.033s (30.000 fps)
		Interval: Discrete 0.042s (24.000 fps)
		Interval: Discrete 0.050s (20.000 fps)
		Interval: Discrete 0.067s (15.000 fps)
		Interval: Discrete 0.100s (10.000 fps)
		Interval: Discrete 0.133s (7.500 fps)
		Interval: Discrete 0.200s (5.000 fps)
	Size: Discrete 320x180
		Interval: Discrete 0.033s (30.000 fps)
		Interval: Discrete 0.042s (24.000 fps)
		Interval: Discrete 0.050s (20.000 fps)
		Interval: Discrete 0.067s (15.000 fps)
		Interval: Discrete 0.100s (10.000 fps)
		Interval: Discrete 0.133s (7.500 fps)
		Interval: Discrete 0.200s (5.000 fps)
	Size: Discrete 320x240
		Interval: Discrete 0.033s (30.000 fps)
		Interval: Discrete 0.042s (24.000 fps)
		Interval: Discrete 0.050s (20.000 fps)
		Interval: Discrete 0.067s (15.000 fps)
		Interval: Discrete 0.100s (10.000 fps)
		Interval: Discrete 0.133s (7.500 fps)
		Interval: Discrete 0.200s (5.000 fps)
	Size: Discrete 352x288
		Interval: Discrete 0.033s (30.000 fps)
		Interval: Discrete 0.042s (24.000 fps)
		Interval: Discrete 0.050s (20.000 fps)
		Interval: Discrete 0.067s (15.000 fps)
		Interval: Discrete 0.100s (10.000 fps)
		Interval: Discrete 0.133s (7.500 fps)
		Interval: Discrete 0.200s (5.000 fps)
	Size: Discrete 432x240
		Interval: Discrete 0.033s (30.000 fps)
		Interval: Discrete 0.042s (24.000 fps)
		Interval: Discrete 0.050s (20.000 fps)
		Interval: Discrete 0.067s (15.000 fps)
		Interval: Discrete 0.100s (10.000 fps)
		Interval: Discrete 0.133s (7.500 fps)
		Interval: Discrete 0.200s (5.000 fps)
	Size: Discrete 640x360
		Interval: Discrete 0.033s (30.000 fps)
		Interval: Discrete 0.042s (24.000 fps)
		Interval: Discrete 0.050s (20.000 fps)
		Interval: Discrete 0.067s (15.000 fps)
		Interval: Discrete 0.100s (10.000 fps)
		Interval: Discrete 0.133s (7.500 fps)
		Interval: Discrete 0.200s (5.000 fps)

Hi,
OpenCV installed through Jetpack4.2 does not enable gstreamer. You may re-install OpenCV with scripts in

This is an issue on openCV.

Please refer to this thread from openCV forum.
https://answers.opencv.org/question/74017/how-to-set-camera-format-in-opencv/

Got it working!

I am not sure what fixed the error,

  1. Rebuild the OpenCV with Gstreamer On
  2. Replace the USB 2.0 hub to a USB 3.0 hub