[Bug 765615] New: Setting avdec_h264's (which is in a uridecodebin) parameter max-threads sometime been ignored

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=765615

            Bug ID: 765615
           Summary: Setting avdec_h264's (which is in a uridecodebin)
                    parameter max-threads sometime been ignored
    Classification: Platform
           Product: GStreamer
           Version: 1.6.2
                OS: Linux
            Status: NEW
          Severity: major
          Priority: Normal
         Component: gst-plugins-base
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: alexbolotsin at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Hello.

I'm using urideocdebin and trying to set max-threads variable on avdec_h264.
But sometimes after a bunch of restarts it spawns threads ignoring max-threads
value. Especially it happens when a server has serious load - around 80%.

What should I do about it?

My pipeline looks like that:
        uridecodebin name=uridecodebin0
        souphttpsrc name=source
        typefind name=typefindelement0
        decodebin name=decodebin0
        typefind name=typefind
        hlsdemux name=hlsdemux0
        multiqueue name=multiqueue0
        tsdemux name=tsdemux0
        multiqueue name=multiqueue1
        h264parse name=h264parse0
        capsfilter name=capsfilter0
        aacparse name=aacparse0
        avdec_h264 name=avdec_h264-0
        avdec_aac name=avdec_aac0
   here uridecodebin ends
        videoconvert name=videoconvert0
        x264enc name=x264enc0
        audioconvert name=audioconvert0
        faac name=faac0
        flvmux name=flvmux0
        rtmpsink name=rtmpsink0

I'm setting max-threads in bus-watch-callback like this:

    static bool avdec_settings = false;
    if (!avdec_settings && args_has_argument(job->args,
"avdec_h264.max-threads")) {
        GstElement* element = (GstElement*)GST_MESSAGE_SRC(message);
        if (element && GST_IS_ELEMENT(element)) {
            std::string factoryType =
gst_plugin_feature_get_name(GST_PLUGIN_FEATURE
                (gst_element_get_factory(element)));
            if (factoryType == "avdec_h264") {
                avdec_settings = true;
                GstObject* avdec = GST_MESSAGE_SRC(message);
                int threads = args_to_int(args_get_value(job->args,
"avdec_h264.max-threads"));
                g_object_set(avdec, "max-threads", threads, NULL);
            }
        }
    }

So what it does - waits for a avdec_h264 to appear in pipeline and sets it with
value from arguments.

I have gst 1.6.2 running under ubuntu 14.04.3 lts.

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