Save Image in XML file

[neda]

Hi,
I want to get image from camera and save to XML file.
I pass "photoPreview.source (== image://camera/preview_1)" as URL of captured image to c++ class.
I have this error:
"Open error"

I use this code for save image in XML file:

QFile fileImg(url_image); // == > photoPreview.source (== image://camera/preview_1)
        fileImg.open(QIODevice::ReadOnly);
        QByteArray imageData = fileImg.readAll();
        QByteArray imageData_Base64 = imageData.toBase64();
        xmlWriter.writeAttribute("image",imageData_Base64);

QFile fileImg(url_image); // == > photoPreview.source (== image://camera/preview_1)
        fileImg.open(QIODevice::ReadOnly);
        QByteArray imageData = fileImg.readAll();
        QByteArray imageData_Base64 = imageData.toBase64();
        xmlWriter.writeAttribute("image",imageData_Base64);

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