Hi, this is because of your installed libstdc++ lib in MinGW directory. Hope this library version is different from your Qt4/5 installed libstdc++ lib. Regards, Heman P -- View this message in context: http://gstreamer-devel.966125.n4.nabble.com/QtGstreamer-tp4160229p4672007.html Sent from the GStreamer-devel mailing list archive at Nabble.com.