pixmap saving image with random size

killown

I am using the following code to take a pic from a webcam but the pixmap is saving the image with random size, and I would like to save it with 354, 472, does anyone know what's going on with pixamap.scaled?

I am following this example https://doc.qt.io/qt-5/qtmultimedia-multimediawidgets-camera-example.html

void Camera::processCapturedImage(int requestId, const QImage& img)
{
Q_UNUSED(requestId);
QImage scaledImage = img.scaled(ui->viewfinder->size(),
                                Qt::KeepAspectRatio,
                                Qt::SmoothTransformation);

ui->lastImagePreviewLabel->setPixmap(QPixmap::fromImage(scaledImage));
 QPixmap pixmap(QPixmap::fromImage(scaledImage));
 qDebug() << QCoreApplication::applicationDirPath();

 //create /image folder
 QString folder = QCoreApplication::applicationDirPath() + "/images";
 QString image = folder + "/new.jpg";

 qDebug() << QDir(folder).exists();
 if(!QDir(folder).exists())
 {
     QDir().mkdir(folder);
 }
 //

 //scale 3x4 pic
 pixmap.scaled(QSize(354, 472),  Qt::KeepAspectRatio);
 pixmap.save(image);
 emit enteredText(QString("Imagem Salva!"));
 this->close();


// Display captured image for 4 seconds.
displayCapturedImage();
QTimer::singleShot(4000, this, SLOT(displayViewfinder()));
}

tham

I guess Qt::KeepAspectRatio is the reason, change it to Qt::IgnoreAspectRatio may solve this problem

//according to document, IgnoreAspectRatio is default value
//you do not need to specify it if you like
pixmap.scaled(QSize(354, 472),  Qt::IgnoreAspectRatio);

By the way, why create another pixmap?Why not just use the QImage(scaledImage) to save your picture?Thanks

killown

@tham solved, thank you