Question

我从几台摄像机获得不同的视频流，我希望使用OpenCV imshow并行查看。 imageCapture功能非常简单，单独运行时不会造成任何麻烦。但是，当我运行多个线程时，我会收到Gtk错误。

线程完成如下：

std::thread capture1 (captureImages,hCams.at(0),cSettingsVector.at(0));
std::thread capture2 (captureImages,hCams.at(1),cSettingsVector.at(1));
capture1.join();
capture2.join();

捕捉图像功能：

std::cout << std::endl<< std::endl << "Entering capture function " << std::endl;
int nRet;
char* imgMem;
int memId;
void *pMem;

int bitsPerPixel;
if (cSettings.color == true)
{
    bitsPerPixel = 24;
}
else
{
    bitsPerPixel = 8;
}
char buffer[256];
sprintf(buffer,"Calling AllocImageMem with handler %i on %s", hCam, cSettings.SN.c_str());
std::cout << buffer << std::endl;
nRet = is_AllocImageMem(hCam, cSettings.AOI.s32Width, cSettings.AOI.s32Height, bitsPerPixel, &imgMem, &memId);
nRet = is_SetImageMem (hCam, imgMem, memId);
nRet = is_CaptureVideo(hCam,IS_DONT_WAIT);

unsigned int iframe(0);
for(;;)
{

    nRet = is_GetImageMem(hCam, &pMem);
    cv::Mat frame;
    if (cSettings.color == true)
    {
        cv::Mat colorFrame(cv::Size(cSettings.AOI.s32Width, cSettings.AOI.s32Height),CV_8UC3,pMem);
        frame = colorFrame;
    }
    else
    {
        cv::Mat grayFrame(cv::Size(cSettings.AOI.s32Width, cSettings.AOI.s32Height),CV_8UC1,pMem);
        frame = grayFrame;
    }

    cv::namedWindow(cSettings.SN,cv::WINDOW_OPENGL);
    cv::imshow(cSettings.SN,frame);
    cv::waitKey(1);

    char buffer[128];

    sprintf(buffer,"/home/scanner3d/videoCapture/%i-%s.png",iframe,cSettings.SN.c_str());
    cv::imwrite(buffer,frame);
    std::cout << buffer << std::endl;
    iframe ++;
}
sprintf(buffer,"Process with handle %i on %s is done.", hCam, cSettings.SN.c_str());
std::cout << buffer << std::endl;

要将其包装起来，以下是错误：

(4103086391:781): Gtk-WARNING **: gtk_disable_setlocale() must be called before gtk_init()

(4103086391:781): GLib-GObject-WARNING **: cannot register existing type 'GTypeModule'

(4103086391:781): GLib-GObject-CRITICAL **: g_type_add_interface_static: assertion 'G_TYPE_IS_INSTANTIATABLE (instance_type)' failed

(4103086391:781): GLib-GObject-CRITICAL **: g_type_register_static: assertion 'parent_type > 0' failed

(4103086391:781): GLib-GObject-CRITICAL **: g_object_new: assertion 'G_TYPE_IS_OBJECT (object_type)' failed

(4103086391:781): GLib-GObject-WARNING **: cannot register existing type 'GTypeModule'

(4103086391:781): GLib-GObject-CRITICAL **: g_type_add_interface_static: assertion 'G_TYPE_IS_INSTANTIATABLE (instance_type)' failed

(4103086391:781): GLib-GObject-CRITICAL **: g_type_module_set_name: assertion 'G_IS_TYPE_MODULE (module)' failed
Segmentation fault (core dumped)

4103086391是摄像机的唯一标识符，我将其用作窗口名称，因此它出现在错误日志中。

如果我不使用imshow，代码会运行（尽管有其他错误），因为我可以使用imwrite从两个线程编写帧。

在不同的线程上使用cv :: imshow（“name”，Mat）

0 个答案: