QCameraImageCapture save image to file

[lelel]

Hi
I use QCameraImageCapture

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ...
    cameraImageCapture = new QCameraImageCapture(camera);
    cameraImageCapture->setCaptureDestination(QCameraImageCapture::CaptureToBuffer);
    connect(cameraImageCapture,SIGNAL(imageCaptured(int,QImage)),this,SLOT(imageCapture(int,QImage)));
}

void MainWindow::on_buttonTakePhoto_clicked()
{
    camera->start();
    camera->searchAndLock();
    cameraImageCapture->capture();
    camera->unlock();
    camera->stop();
}

This code save image to file, even though it is set differently.

Where is problem?

[SGaist]

Hi and welcome to devnet,

What is your problem in the first place ? The code looks it's working.

[lelel]

@SGaist Image is save on disk, even though I set capture destination to buffer.

[SGaist]

What version of Qt ? On what OS ? How did you diagnose that ?

[lelel]

Qt version is 5.6.0. Os is Xubuntu 16.04 lts.

[Ratzz]

@lelel
May be because doc says this?

The CaptureDestinations type is a typedef for QFlags<CaptureDestination>. It stores an OR combination of CaptureDestination values.

[lelel]

@Ratzz
I set only CaptureToBuffer

cameraImageCapture->setCaptureDestination(QCameraImageCapture::CaptureToBuffer);
qDebug() << cameraImageCapture->captureDestination();

Output is :

QFlags(0x2)

In doc 0x2 is a value of QCameraImageCapture::CaptureToBuffer.

[SGaist]

Did you check that the capture destination was supported ? You can do that using isCaptureDestinationSupported.

[lelel]

@SGaist

qDebug() << cameraImageCapture->isCaptureDestinationSupported(QCameraImageCapture::CaptureToFile);
qDebug() << cameraImageCapture->isCaptureDestinationSupported(QCameraImageCapture::CaptureToBuffer);

Output:

true
true

[feng_wi]

I had the same problem. Qt version is 5.12.3. Os is ubuntu 18.04 lts. Files can only be deleted periodically...