trying to capture video from my web cam only shows gray.
Using Visual Studio 2012 - C++/Qt.
this is what i get when i try to capture the frames: i.imgur.com/x7zYVAX.jpg
some code:
qDebug() << "button 0 clicked." << endl;
//Opens the video device #0.
cap = new VideoCapture(0);
if (!cap->isOpened())
{
qDebug() << "Cannot open the video file" << endl;
return;
}
cv::Mat srcFrame;
//read a new frame from video.
bool bSuccess = cap->read(srcFrame);
if (!bSuccess)
{
qDebug() << "Cannot read a frame from video device." << endl;
return;
}
scene->addPixmap(QPixmap::fromImage(Mat2QImage(srcFrame), Qt::AutoColor));
QImage MainWindow::Mat2QImage(cv::Mat const& src)
{
cv::Mat temp; // make the same cv::Mat
cvtColor(src, temp,CV_BGR2RGB); // cvtColor Makes a copt, that what i need
QImage dest((uchar*) temp.data, temp.cols, temp.rows, temp.step, QImage::Format_RGB888);
QImage dest2(dest);
dest2.detach(); // enforce deep copy
return dest2;
}
my .pro file:
win32 {
INCLUDEPATH += C:/opencv/build/include
LIBS += -LC:/opencv/build/x86/vc11/lib
CONFIG(debug, debug|release) {
LIBS += -lopencv_calib3d246d \
-lopencv_contrib246d \
-lopencv_core246d \
-lopencv_features2d246d \
#-lopencv_ffmpeg246d \
-lopencv_flann246d \
-lopencv_gpu246d \
-lopencv_highgui246d \
-lopencv_imgproc246d \
-lopencv_legacy246d \
-lopencv_ml246d \
-lopencv_nonfree246d \
-lopencv_objdetect246d \
-lopencv_ocl246d \
-lopencv_photo246d \
-lopencv_stitching246d \
-lopencv_superres246d \
-lopencv_ts246d \
-lopencv_video246d \
-lopencv_videostab246d
}
CONFIG(release, debug|release) {
LIBS += -lopencv_calib3d246 \
-lopencv_contrib246 \
-lopencv_core246 \
-lopencv_features2d246 \
#-lopencv_ffmpeg246 \
-lopencv_flann246 \
-lopencv_gpu246 \
-lopencv_highgui246 \
-lopencv_imgproc246 \
-lopencv_legacy246 \
-lopencv_ml246 \
-lopencv_nonfree246 \
-lopencv_objdetect246 \
-lopencv_ocl246 \
-lopencv_photo246 \
-lopencv_stitching246 \
-lopencv_superres246 \
-lopencv_ts246 \
-lopencv_video246 \
-lopencv_videostab246
}
}
