engine.load(QUrl(QStringLiteral("qrc:/MediaPlayer.qml")));
QObject *root = engine.rootObjects().first();
QQuickWindow *window = qobject_cast<QQuickWindow *>(root);
engine.load(QUrl(QStringLiteral("qrc:/MediaPlayer.qml")));
QObject *root = engine.rootObjects().first();
QQuickWindow *window = qobject_cast<QQuickWindow *>(root);