Trying to run the embedded code example from Matlab on the Jetson TX2

Autonomous Machines Jetson & Embedded Systems Jetson TX2
1

Hello,

I am trying to run the example from this link:
https://www.mathworks.com/help/gpucoder/examples/running-an-embedded-application-on-the-nvidia-r-jetson-tx2-developer-kit.html

On my TX2 board. When I finally do go to run it I get these errors:

nvidia@tegra-ubuntu:~/Desktop/codegen/lib/alexnet_predict$ ./alexnet_exe /dev/video1
VIDEOIO ERROR: libv4l unable convert to requested pixfmt
VIDEOIO ERROR: libv4l unable to ioctl VIDIOCSPICT

OpenCV(3.4.1-dev) Error: Unspecified error (GStreamer: unable to start pipeline
) in cvCaptureFromCAM_GStreamer, file /home/nvidia/opencv/modules/videoio/src/cap_gstreamer.cpp, line 890
VIDEOIO(cvCreateCapture_GStreamer(CV_CAP_GSTREAMER_V4L2, reinterpret_cast<char *>(index))): raised OpenCV exception:

OpenCV(3.4.1-dev) /home/nvidia/opencv/modules/videoio/src/cap_gstreamer.cpp:890: error: (-2) GStreamer: unable to start pipeline
in function cvCaptureFromCAM_GStreamer

Could not open the video capture device.

I have not been able to find anything helpful with troubleshooting this problem. I was wondering if anyone else has run into this issue?

2

It sounds like their GStreamer pipeline is misconfigured for the camera. Are you using JetPack 3.2? Have you contacted Mathworks support about it?

3

Yes I am using JetPack 3.2, and I installed opencv as per the instructions I found on another thread to have GStreamer on and configured.

The thread is here: https://devtalk.nvidia.com/default/topic/1020915/opencv-and-webcam-problem-pixel-format-of-incoming-image-is-unsupported-by-opencv/

4

Do you have a USB camera with /dev/video1 appearing a few seconds after you plug it in ?

5

Yes, I am using the logitech C920 webcam.

Also, I tried running this command as per the Mathworks tutorial and this is the error I got with it:

nvidia@tegra-ubuntu:~/Desktop/codegen/lib/alexnet_predict$ ./alexnet_exe 1

CUDNN_STATUS_BAD_PARAM, line: 168, file: MWCNNLayerImpl.cu

6

Hi,

There are different error shared in comment #1 and comment #5.
Have you fixed the openCV error already?

For the CUDNN_STATUS_BAD_PARAM, it is usually casued by incompatible driver and libraries.

Suppose you are following this tutorial from mathworks:
https://nl.mathworks.com/help/gpucoder/examples/running-an-embedded-application-on-the-nvidia-r-jetson-tx2-developer-kit.html

It is set up with cuDNN 5.0 and the nearest JetPack version should be 3.0 which includes cuDNN 5.1:
https://developer.nvidia.com/embedded/jetpack-3_0

Thanks.