MediaRenderer on a headless system

(process:824): GStreamer-WARNING **: The GStreamer function gst_init_get_option_group() was
	called, but the GLib threading system has not been initialised
	yet, something that must happen before any other GLib function
	is called. The application needs to be fixed so that it calls
	   if (!g_thread_get_initialized ()) g_thread_init(NULL);
	as very first thing in its main() function. Please file a bug
	against this application.

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