According to your request, the pipeline should be something like: gst-launch-1.0 filesrc location=pre.mp4 ! qtdemux name=dec ! queue ! h264parse ! avdec_h264 ! autovideosink dec. ! queue ! aacparse ! avdec_aac ! autoaudiosink Hope it will help -- Sent from: http://gstreamer-devel.966125.n4.nabble.com/