clean up

src/gstreamerextras/playback/qgstreamermediaplayer.cpp

@@ -192,15 +192,15 @@ void QGstreamerMediaPlayer::setMediaObject(QMediaObject *src)
     connect(d->session, &QGstreamerPlayerSession::streamsChanged,
         this, &QGstreamerMediaPlayer::streamsChanged);
 
-    d->mediaObject = src;
-    emit mediaObjectChanged();
-
     // In case if these values've been applied
     // before mediaObject is available.
     setVideoSink(d->videoSink);
     setShowText(d->showText);
     setTextUri(d->textUri);
     setTextFont(d->textFont);
+
+    d->mediaObject = src;
+    emit mediaObjectChanged();    
 }
 
 QString QGstreamerMediaPlayer::videoSink() const