<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><style></style></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1>Thanks Stirling,<o:p></o:p><o:p> </o:p>When gst_element_get_state call returns GST_STATE_CHANGE_ASYNC, I believe, we can wait and check again the state of pipeline using gst_element_get_state.<o:p></o:p>However, when it returns GST_STATE_CHANGE_FAILURE, what action do you normally take?<o:p></o:p><o:p> </o:p>Also, what does the function bus_message_handler(app, msg) do?<o:p></o:p><a name="_MailEndCompose"><o:p> </o:p></a>From: gstreamer-devel-bounces+al.mohamed.salim=gmail.com@lists.freedesktop.org [mailto:gstreamer-devel-bounces+al.mohamed.salim=gmail.com@lists.freedesktop.org] On Behalf Of Stirling Westrup Sent: Tuesday, May 07, 2013 11:37 PM To: Discussion of the development of and with GStreamer Subject: Re: gst_element_get_state hangs<o:p></o:p><o:p> </o:p><div><div>Most likely the pipeline is getting stuck trying to change state. You want to ensure that you put in a reasonable timeout for the gst_element_get_state call. If the call does time out (returns GST_STATE_CHANGE_FAILURE or GST_STATE_CHANGE_ASYNC) then you should check the message bus for errors. I use this little function for that:<o:p></o:p></div>// Returns true is any messages were found on the bus.<o:p></o:p><div>static gboolean message_check ( App * app ) { gboolean ret = FALSE; GstBus * bus = gst_pipeline_get_bus(app->pipeline); GstMessage * msg = gst_bus_pop(bus); while(msg) { ret |= bus_message_handler(app,msg); gst_message_unref(msg); msg = gst_bus_pop(bus); } gst_object_unref(bus); return ret; }<o:p></o:p></div></div><div><o:p> </o:p><div>On Tue, May 7, 2013 at 9:30 AM, Mohammad-AL.Gmail <<a href="mailto:al.mohamed.salim@gmail.com" target="_blank">al.mohamed.salim@gmail.com</a>> wrote:<o:p></o:p><div><div>In my GStreamer (0.10.32) based player, I switch pipeline to PAUSE and then switch state to NULL instead of READY after playback of a file is finished and then unref the pipeline.<o:p></o:p>However, I face a problem, when I play media files in a folder one after another:<o:p></o:p> <o:p></o:p>The playback of files goes OK one after another. <o:p></o:p>However once a while the GStreamer hangs when I turn the status of the pipeline to GST_STATE_PLAY.<o:p></o:p>Creation of playbin2, setting uri, and getting message bus goes OK. It hangs only when state is switch to READY.<o:p></o:p> <o:p></o:p>I am not able to make out which part / element blocks the pipeline. <o:p></o:p>Once this happen, the pipeline becomes non-responsive.<o:p></o:p> <o:p></o:p>Regards,<o:p></o:p>Salim<o:p></o:p></div></div> _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a><o:p></o:p></div> -- Stirling Westrup Programmer, Entrepreneur. <a href="https://www.linkedin.com/e/fpf/77228" target="_blank">https://www.linkedin.com/e/fpf/77228</a> <a href="http://www.linkedin.com/in/swestrup" target="_blank">http://www.linkedin.com/in/swestrup</a> <a href="http://technaut.livejournal.com" target="_blank">http://technaut.livejournal.com</a> <a href="http://sourceforge.net/users/stirlingwestrup" target="_blank">http://sourceforge.net/users/stirlingwestrup</a> <o:p></o:p></div></div></body></html>