Thanks Tim. Putting queues still does not help. I am attaching the log with the queues in place. I do not see the pipeline reaching PLAYING state. The pipeline hangs and I need to kill it using Ctrl-C. As soon as I kill it, I see "ERROR: pipeline doesn't want to preroll". See line number 44930 of the attached logs. My suspicion is that mpgdemux does not send no-more-pads and hence decodebin does not change state to PLAYING which means filesink does not preroll. Has anyone used mpgdemux with decodebin and filesink? thanks and regards Mohit <div class="gmail_quote">On Thu, Feb 28, 2008 at 6:03 PM, Tim Müller <<a href="mailto:t.i.m@zen.co.uk">t.i.m@zen.co.uk</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div class="Ih2E3d">On Thu, 2008-02-28 at 17:44 +0530, Mohit Garg wrote: > I am using gstreamer to work with MPEG-1 streams. However, I am unable > to get it working. The pipeline hangs and does not go to a PLAYING > state. I suspect the issues to be mpegdemux not sending no_more_pads() > and hence decodebin not being able to change stage to PLAYING which > causes filesink to be stuck in PAUSED and hence, not coming out of > preroll-ing. > > e.g. try this pipeline: > gst-launch -v gnomevfssrc > location="<a href="http://samples.mplayerhq.hu/MPEG1/mpeg_demuxer_crash.mpg" target="_blank">http://samples.mplayerhq.hu/MPEG1/mpeg_demuxer_crash.mpg</a>" ! > decodebin name=d ! filesink location=aud d. ! filesink location=vid </div>You need queues here, ie.  decodebin name=d  \    d. ! queue ! filesink location=audio.dump  \    d. ! queue ! filesink location=video.dump (you can't really assume that the first one will be an audio stream and the second a video stream though; you can use mpegdemux/dvddemux and specify that pad names directly, however, but then you also need to know which streams exist to get the right pad names; alternatively, if you know the format of the audio, you can add filter caps before the queue and make it pick the right pad that way). Cheers  -Tim <div><div></div><div class="Wj3C7c"> > Questions: >         Is this a known bug? If yes, is there a known/recommended workaround? >         mpegdemux has a RANK of secondary and I was expecting that it would work straightaway while ffdemux_mpeg has a rank of NONE and hence decodebin does not pick it up. How is the RANK of elements decided? > (I am using gst-plugins-ugly-0.10.6) </div></div></blockquote></div> -- "We know we have a duty to hope" -- Sunita Narain, Environmentalist regards Mohit Garg Personal Homepage: <a href="http://www.mohrahit.in">http://www.mohrahit.in</a> Social Work: <a href="http://www.noragging.com">http://www.noragging.com</a>