After following some answers in the stackoverflow, I understood how to use timer to display videos in qt. But Still my program doesn't even get to the function that will be called repeatedly. I am not understanding what I am doing wrong.
Here's my code -
VideoCapture cap(0);
QTimer *imageTimer;
Mat frame;
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
{
ui.setupUi(this);
const int imagePeriod = 1000 / 25; // ms
imageTimer = new QTimer(this);
imageTimer->setInterval(imagePeriod);
connect(imageTimer, SIGNAL(timeout()), this, SLOT(showVideo()));
}
MainWindow::~MainWindow()
{
}
QImage MainWindow::getQImage(cv::Mat &timage){
static QVector colorTable;
if (colorTable.isEmpty()){
for (int i = 0; i < 256; i++){
colorTable.push_back(qRgb(i, i, i));
}
}
if (timage.type() == CV_8UC3){
QImage temp = QImage((const unsigned char*)(timage.data), timage.cols, timage.rows, timage.step, QImage::Format_RGB888);
return temp.rgbSwapped();
}
else if (timage.type() == CV_8UC1){
QImage temp = QImage((const unsigned char*)(timage.data), timage.cols, timage.rows, timage.step, QImage::Format_Indexed8);
temp.setColorTable(colorTable);
return temp;
}
}
void MainWindow::on_startButton_pressed(){
imageTimer->start(10);
}
void MainWindow::showVideo(){
cap.read(frame);
ui.videoFeed->setScaledContents(true);
ui.videoFeed->setPixmap(QPixmap::fromImage(getQImage(frame)));
ui.videoFeed->resize(ui.videoFeed->pixmap()->size());
this->update();
}
void MainWindow::on_stopButton_pressed(){
imageTimer->stop();
}> This is the Header FIle
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
MainWindow(QWidget *parent = 0);
~MainWindow();
QImage MainWindow::getQImage(cv::Mat &timage);
private:
Ui::MainWindowClass ui;
private slots:
void on_startButton_pressed();
void on_stopButton_pressed();
public slots:
void MainWindow::showVideo();
};
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