Does using qtmux work? I currently can't test this. Based on the details of mp4mux (gst-inspect-1.0 mp4mux), it doesn't look like mjpeg is supported. I'm not sure if that's just because GStreamer never implemented this, or if it's a limitation of the actual MP4 container. -- Sent from: http://gstreamer-devel.966125.n4.nabble.com/