I have tried ,but it still can't work . In fact, before I send help to here, I have added "queue".I just made a mistake and lost to write it. -- View this message in context: http://gstreamer-devel.966125.n4.nabble.com/Does-it-have-mistake-tp2280644p2281692.html Sent from the GStreamer-devel mailing list archive at Nabble.com.