jetson-inference in TX2 segmentation failt(core dump) when call opencv imshow()

[symao]

I try to use jetson-inference and opencv, it dumps once i call imshow(). But if i call other opencv functions like cv::Mat, it's ok. I found it dumps before entering the main(), and i use gdb to debug, it says:

qmetaobject::className segmentation fault from libqt5core.so.5

I think jetson-inference use qt4, Does opencv imshow() use qt5? I assume it may be the conflict between qt4 and qt5, but how can i solve it? Anybody run successfully with jetson-inference and opencv? Is there any sample code to do that?

[alexlow-bh]

am actually having this issue as well, there are issues from qt4 as well. The gdb debug gives a different error as below:

QBasicAtomicInt::ref (this=\<optimized out>) at ../../include/QtCore/../../src/corelib/arch/qatomic_aarch64.h:116 116 ../../include/QtCore/../../src/corelib/arch/qatomic_aarch64.h: No such file or directory.

The error is seen with opencv namedWindow function as well.

[dusty-nv]

Can you try calling cudaThreadSynchronize() before you do OpenCV stuff? Are you sure you are passing CPU pointer to OpenCV?

[alexlow-bh]

Below is a code snippet of how the error is produced; the segmentation fault is thrown even before any code is run.

Thanks for taking the time to reply.

detectNet* net = detectNet::Create(argc, argv);

cv::VideoCapture cap(videosource);

if(!cap.isOpened())
{
    printf("Error opening video\n");
    return -1;
}

while(1)
{
    cv::Mat frame;
    cap >> frame;
    if (frame.empty())
        return 0;
    cv::imshow("Detections", frame);
    cv::waitKey(1);
}