diff --git a/src/QrCodeScannerFilter.cpp b/src/QrCodeScannerFilter.cpp
index b20255e..5a9bd7f 100644
--- a/src/QrCodeScannerFilter.cpp
+++ b/src/QrCodeScannerFilter.cpp
@@ -1,139 +1,141 @@
 /*
  *  Kaidan - A user-friendly XMPP client for every device!
  *
  *  Copyright (C) 2016-2019 Kaidan developers and contributors
  *  (see the LICENSE file for a full list of copyright authors)
  *
  *  Kaidan is free software: you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation, either version 3 of the License, or
  *  (at your option) any later version.
  *
  *  In addition, as a special exception, the author of Kaidan gives
  *  permission to link the code of its release with the OpenSSL
  *  project's "OpenSSL" library (or with modified versions of it that
  *  use the same license as the "OpenSSL" library), and distribute the
  *  linked executables. You must obey the GNU General Public License in
  *  all respects for all of the code used other than "OpenSSL". If you
  *  modify this file, you may extend this exception to your version of
  *  the file, but you are not obligated to do so.  If you do not wish to
  *  do so, delete this exception statement from your version.
  *
  *  Kaidan is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License
  *  along with Kaidan.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 #include "QrCodeScannerFilter.h"
 
 #include <QDebug>
+#include <QCamera>
+#include <QCameraViewfinderSettings>
 #include <QtConcurrent/QtConcurrent>
 
 QrCodeScannerFilter::QrCodeScannerFilter(QObject *parent)
 	: QAbstractVideoFilter(parent),
 	  m_decoder(new QrCodeDecoder(this))
 {
 	connect(m_decoder, &QrCodeDecoder::decodingFailed,
 			this, &QrCodeScannerFilter::scanningFailed);
 	connect(m_decoder, &QrCodeDecoder::decodingSucceeded,
 			this, &QrCodeScannerFilter::scanningSucceeded);
 }
 
 QrCodeScannerFilter::~QrCodeScannerFilter()
 {
 	if (!m_processThread.isFinished()) {
 		m_processThread.cancel();
 		m_processThread.waitForFinished();
 	}
 }
 
 QrCodeDecoder *QrCodeScannerFilter::decoder()
 {
 	return m_decoder;
 }
 
 QVideoFilterRunnable *QrCodeScannerFilter::createFilterRunnable()
 {
 	return new QrCodeScannerFilterRunnable(this);
 }
 
 void QrCodeScannerFilter::setCameraDefaultVideoFormat(QObject *qmlCamera)
 {
 	QCamera *camera = qvariant_cast<QCamera*>(qmlCamera->property("mediaObject"));
 	if (camera) {
 		QCameraViewfinderSettings settings = camera->viewfinderSettings();
 		settings.setPixelFormat(QVideoFrame::Format_RGB24);
 		camera->setViewfinderSettings(settings);
 	} else {
 		qWarning() << "Could not set pixel format of QML camera";
 	}
 }
 
 QrCodeScannerFilterRunnable::QrCodeScannerFilterRunnable(QrCodeScannerFilter *filter)
 	: QObject(nullptr),
 	m_filter(filter)
 {
 }
 
 QVideoFrame QrCodeScannerFilterRunnable::run(
 		QVideoFrame *input,
 		const QVideoSurfaceFormat &,
 		RunFlags
 ) {
 	// Only one frame is processed at a time.
 	if (input == nullptr
 			|| !input->isValid()
 			|| !m_filter->m_processThread.isFinished()) {
 		return *input;
 	}
 
 	// Copy the data to be filtered.
 	m_filter->m_frame.setData(*input);
 
 	// Run a separate thread for processing the data.
 	m_filter->m_processThread = QtConcurrent::run(
 			this,
 			&QrCodeScannerFilterRunnable::processVideoFrameProbed,
 			m_filter->m_frame,
 			m_filter
 	);
 	return *input;
 }
 
 void QrCodeScannerFilterRunnable::processVideoFrameProbed(
 		QrCodeVideoFrame videoFrame,
 		QrCodeScannerFilter *filter
 ) {
 	// Return if the frame is empty.
 	if (videoFrame.data().isEmpty())
 		return;
 
 	// Create an image from the frame.
 	const QImage *image = videoFrame.toGrayscaleImage();
 
 	// Return if conversion from the frame to the image failed.
 	if (image->isNull()) {
 		// dirty hack: write QVideoFrame::PixelFormat as string to format using QDebug
 		//             QMetaEnum::valueToKey() did not work
 		QString format;
 		QDebug(&format).nospace() << videoFrame.pixelFormat();
 
 		qDebug() << "QrCodeScannerFilterRunnable error: Cannot create image file to process.";
 		qDebug() << "Maybe it was a format conversion problem.";
 		qDebug() << "VideoFrame format:" << format;
 		qDebug() << "Image corresponding format:"
 		         << QVideoFrame::imageFormatFromPixelFormat(videoFrame.pixelFormat());
 
 		emit filter->unsupportedFormatReceived(format);
 		return;
 	}
 
 	// Decode the image.
 	m_filter->decoder()->decodeImage(*image);
 
 	delete image;
 }