thanks <div class="gmail_quote">2009/9/29 Tim-Philipp Müller <<a href="mailto:t.i.m@zen.co.uk">t.i.m@zen.co.uk</a>> <blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid"> <div class="im">On Tue, 2009-09-29 at 11:36 +0800, dxssx wrote: > Pipeline "filesrc location=xxx.mp4 ! qtdemux name=demux > demux.audio_00 ! queue ! filesink location=a.aac demux.video_00 ! > queue ! filesink location=a.h264" works well, but "filesrc > location=xxx.mp4 ! qtdemux name=demux demux.audio_00 ! filesink > location=a.aac demux.video_00 ! filesink location=a.h264" does not > work. > > > It seems to be a dead lock in basesink which is waiting for a play > event. > > > Does it necessary to add a queue in pipeline when demuxing? </div>Yes, you need to add queues, otherwise the pipeline can't preroll because the first sink to get data will block and control won't be given back to qtdemux to push data to the other sink (which will then wait for data forever and never preroll). Cheers -Tim > ------------------------------------------------------------------------------ Come build with us! The BlackBerry&reg; Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9&#45;12, 2009. Register now&#33; <a href="http://p.sf.net/sfu/devconf" target="_blank">http://p.sf.net/sfu/devconf</a> _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.sourceforge.net">gstreamer-devel@lists.sourceforge.net</a> <a href="https://lists.sourceforge.net/lists/listinfo/gstreamer-devel" target="_blank">https://lists.sourceforge.net/lists/listinfo/gstreamer-devel</a> </blockquote></div>