--- a/QTfrontend/util/libav_iteraction.h	Sun Sep 09 11:50:34 2012 +0400
+++ b/QTfrontend/util/libav_iteraction.h	Sun Sep 09 13:40:02 2012 +0400
@@ -26,8 +26,10 @@
  *
  * @see <a href="http://en.wikipedia.org/wiki/Singleton_pattern">singleton pattern</a>
  */
-class LibavIteraction
+class LibavIteraction : public QObject
 {
+    Q_OBJECT;
+
     LibavIteraction();
 
 public: