And i capture the packages by wireshak,I find that 'timestamps' is all the same. <http://gstreamer-devel.966125.n4.nabble.com/file/n4665591/1.png> -- View this message in context: http://gstreamer-devel.966125.n4.nabble.com/rtph264pay-udpsink-tp4665589p4665591.html Sent from the GStreamer-devel mailing list archive at Nabble.com.