when it works :
0:00:20.228332000  7814 0x13050 DEBUG           GST_STATES gstelement.c:1800:gst_element_get_state_func:<rtpsinkelement> getting state, timeout 0:00:00.000000000
0:00:20.230407000  7814 0x13050 DEBUG           GST_STATES gstelement.c:1805:gst_element_get_state_func:<rtpsinkelement> RETURN is SUCCESS
0:00:20.234771000  7814 0x13050 DEBUG           GST_STATES gstelement.c:1878:gst_element_get_state_func:<rtpsinkelement> state current: PAUSED, pending: VOID_PENDING, result: SUCCESS



when it bugs :
0:00:38.108581000  7814 0x13050 DEBUG           GST_STATES gstelement.c:1800:gst_element_get_state_func:<rtpsinkelement> getting state, timeout 0:00:00.000000000
0:00:38.110168000  7814 0x13050 DEBUG           GST_STATES gstelement.c:1805:gst_element_get_state_func:<rtpsinkelement> RETURN is ASYNC
0:00:38.111694000  7814 0x13050 DEBUG           GST_STATES gstelement.c:1878:gst_element_get_state_func:<rtpsinkelement> state current: PLAYING, pending: PAUSED, result: ASYNC