<div dir="ltr"><div><div>My experience with JACK is that when the JACK daemon deadlocks due to failure of any client (or one of JACK internal bugs) the result in GStreamer may be also a deadlock as it waits indefinitely for processing. </div>In practice I found JACK not suitable for anything serious. </div>Marcin </div><div class="gmail_extra"> <div class="gmail_quote">2016-06-06 16:45 GMT+02:00 Thomas Scheuermann <<a href="mailto:scheuermann@barco.com" target="_blank">scheuermann@barco.com</a>>: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <div bgcolor="#FFFFFF" text="#000000"> Hi, <div>Am 03.06.2016 um 12:59 schrieb Nicolas Dufresne: </div> <blockquote type="cite"> Le 3 juin 2016 5:06 AM, "Thomas Scheuermann" <<a href="mailto:scheuermann@barco.com" target="_blank"></a><a href="mailto:scheuermann@barco.com" target="_blank">scheuermann@barco.com</a>> a écrit : > > Hello, > > is there a way to force the stopping of a gstreamer pipeline? > We have here a process running with several pipelines which are started > and stopped dynamically. Sometimes it happens that when I set the state > of the pipeline to GST_STATE_NULL (gst_element_set_state(_pipeline, > GST_STATE_NULL);) this call never comes back. > What can I do in this situation? > I use gstreamer 1.8.1 > This is a deadlock. It should not happen unless you are doing something wrong in your application, or if you have hit a big in GStreamer. You may want to share a full backtrace. Nicolas </blockquote> Here is a sample code of a deadlock. I think, it is in jackaudiosink. If you restart the jack daemon while the pipeline is playing, the pipeline can't be stopped anymore. /* * reproducer for deadlock * * gcc -o deadlock deadlock.c -g `pkg-config --libs --cflags gstreamer-1.0` -Wall */ #include <stdio.h> #include <gst/gst.h> int main(int argc, char **argv) { GstElement *pipeline; GstElement *audiosrc; GstElement *audiofilter; GstElement *audiosink; GstCaps *caps; gst_init(&argc, &argv); pipeline = gst_pipeline_new("pipeline"); g_assert(pipeline); audiosrc = gst_element_factory_make("audiotestsrc", "audiotestsrc"); g_assert(audiosrc); audiofilter = gst_element_factory_make("capsfilter", "capsfilter"); g_assert(audiofilter); caps = gst_caps_new_simple("audio/x-raw", "channels", G_TYPE_INT, 2, NULL); g_object_set(G_OBJECT(audiofilter), "caps",caps, NULL); gst_caps_unref(caps); audiosink = gst_element_factory_make("jackaudiosink", "jackaudiosink"); g_assert(audiosink); g_object_set(G_OBJECT(audiosink), "client-name", "test", NULL); g_print("Adding elements\n"); gst_bin_add_many(GST_BIN(pipeline), audiosrc, audiofilter, audiosink, NULL); gst_element_link_many(audiosrc, audiofilter, audiosink, NULL); g_print("Set pipeline state to playing\n"); gst_element_set_state(pipeline, GST_STATE_PLAYING); g_print("Restart jack daemon and press enter\n"); getchar(); g_print("Set pipeline state to null\n"); gst_element_set_state(pipeline, GST_STATE_NULL); g_print("Unref pipeline\n"); gst_object_unref(pipeline); return 0; } This message is subject to the following terms and conditions: <a href="http://www.barco.com/en/maildisclaimer" target="_blank"> MAIL DISCLAIMER</a> </div> _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a> <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> </blockquote></div> </div>