gst_element_change_state 2680 gst/gstbin.c     gst_element_change_state (GST_ELEMENT_CAST (bin), transition);
gst_element_change_state 2220 gst/gstelement.c   ret = gst_element_change_state (element, transition);
gst_element_change_state 2502 gst/gstelement.c   ret = gst_element_change_state (element, transition);