Ideally a new file ( /media/test.mp4 ) will be created by filesink in write mode. So there would be no renaming. ~ HJ -- View this message in context: http://gstreamer-devel.966125.n4.nabble.com/mp4mux-faststart-file-question-tp4666825p4666826.html Sent from the GStreamer-devel mailing list archive at Nabble.com.