I do use RTP If I understand you, you mean that using RTP changes the header of the NALU ? How would I know where a frame begins? -- View this message in context: http://gstreamer-devel.966125.n4.nabble.com/Gstreamer-with-h264-annex-b-tp4670991p4671006.html Sent from the GStreamer-devel mailing list archive at Nabble.com.