Please share your pipe sample make one http://sscce.org/ SSCCE . See here for examples: http://gstreamer-devel.966125.n4.nabble.com/VideoConcat-td971089.html -- View this message in context: http://gstreamer-devel.966125.n4.nabble.com/GnlSource-race-condition-tp4205422p4594338.html Sent from the GStreamer-devel mailing list archive at Nabble.com.