The rtsp server is a ip camera.The gstreamer version is v1.8.3. Here is the wireshark pcapng,the rtsp server ip is 44.120.46.193,my device ip is 44.120.46.78. rtspovertcp.pcapng <http://gstreamer-devel.966125.n4.nabble.com/file/t378764/rtspovertcp.pcapng> Thanks a lot！ -- Sent from: http://gstreamer-devel.966125.n4.nabble.com/