Hi, <div class="gmail_quote">On Thu, Apr 29, 2010 at 10:25 PM, Dr. Peter G. Baum <<a href="mailto:peter@dr-baum.net" target="_blank">peter@dr-baum.net</a>> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> Hi, I want to play video and audio from dvbbasebin with the help of decodebin. When I construct the pipeline for the first time it works perfectly, but when I disconnect decodebin from dvbbasebin and then reconnect, the audio is sometimes OK and sometimes jerky, the video is always jerky. </blockquote><div> sorry, it's not clear to me whether you're reusing the same pipeline or not. </div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> The details follow below. Many thanks for the help, Peter My pipeline looks if I'm connected like this: dvbbasebin0 (PLAYING): -> program_16418 queue7 (PLAYING): -> src tee4 (PLAYING): -> src0 fakesink5 (PLAYING): -> program_16407 queue6 (PLAYING): -> src tee3 (PLAYING): -> src0 fakesink4 (PLAYING): -> program_16406 queue5 (PLAYING): -> src tee2 (PLAYING): -> src0 fakesink3 (PLAYING): -> program_16405 queue4 (PLAYING): -> src tee1 (PLAYING): -> src1 decodebin0 (PLAYING): -> src1 audioSink (PLAYING): -> src0 videoSink (PLAYING): -> src0 fakesink2 (PLAYING): -> program_0 queue3 (PLAYING): -> src tee0 (PLAYING): -> src0 fakesink1 (PLAYING): </blockquote><div> looks like you have many sources connected to a tee, only one branch of the latter is connected to a sink which is a fakesink. Either you can simplify the pipeline or it's not completely reported here. Can you generate a dotfile out of it? You can do ti by calling GST_DEBUG_BIN_TO_DOT_FILE_<div id=":7g" class="ii gt">WITH_TS(bin, details, file_name). Run your app using GST_DEBUG_DUMP_DOT_DIR=$PWD, convert the generated dot file to svg or png and look at it / attach it here.</div> </div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> Video and audio sinks are bins: # make bin for audio sink self._audioSink = gst.Bin( "audioSink" ) # not quite sure whether queue is necessary queue = gst.element_factory_make( "queue" ) queue.set_property( "max-size-buffers", 0 ) queue.set_property( "max-size-time", 0 ) </blockquote><div> What if you do not set the max-size properties? Regards </div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> sink = gst.element_factory_make( "pulsesink" ) self._audioSink.add( queue, sink ) gst.element_link_many( queue, sink ) ghostpad = gst.GhostPad( "sink", queue.get_pad( 'sink' ) ) self._audioSink.add_pad( ghostpad ) # make bin for video sink self._videoSink = gst.Bin( "videoSink" ) # not quite sure whether queue is necessary queue = gst.element_factory_make( "queue" ) queue.set_property( "max-size-buffers", 0 ) queue.set_property( "max-size-time", 0 ) color = gst.element_factory_make( "ffmpegcolorspace" ) # this takes a lot of CPU, but improves quality tremendously deinterlace = gst.element_factory_make( "deinterlace" ) sink = gst.element_factory_make( "xvimagesink" ) self._videoSink.add( queue, color, deinterlace, sink ) gst.element_link_many( queue, color, deinterlace, sink ) ghostpad = gst.GhostPad( "sink", queue.get_pad( 'sink' ) ) self._videoSink.add_pad( ghostpad ) To disconnect I do: teePad = chanInf.pad peer = teePad.get_peer() teePad.set_blocked( True ) teePad.unlink( peer ) teePad.set_blocked( False ) tee = teePad.get_parent_element( ) tee.release_request_pad( teePad ) self._decodebin.unlink( self._audioSink ) self._decodebin.unlink( self._videoSink ) self._decodebin.set_state( gst.STATE_READY ) self._audioSink.set_state( gst.STATE_READY ) self._videoSink.set_state( gst.STATE_READY ) To reconnect I do: def __onProgPadAdded( self, id, pad, new ): pad.link( self._decodebin.get_pad( 'sink' ) ) self._decodebin.set_state( gst.STATE_PLAYING ) And: def __onMuxPadAdded( self, obj, pad ): if pad.can_link( self._audioSink.get_pad( 'sink' ) ): print "linking audio" pad.link( self._audioSink.get_pad( 'sink' ) ) self._audioSink.set_state( gst.STATE_PLAYING ) elif pad.can_link( self._videoSink.get_pad( 'sink' ) ): print "linking video" pad.link( self._videoSink.get_pad( 'sink' ) ) self._videoSink.set_state( gst.STATE_PLAYING ) ------------------------------------------------------------------------------ _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.sourceforge.net" target="_blank">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>