[Telepathy] gst.LinkError in Telepathy Farsight

[Olivier Crête]

You want to do it in this order:

def __stream_created_cb(self, channel, stream):
  print "Start of stream created!"
  stream.connect("src-pad-added", self.__src_pad_added_cb)
  srcpad = stream.get_property ("sink-pad")
  from gst import element_factory_make, STATE_PLAYING
  src = element_factory_make("audiotestsrc")
  src.set_property("is-live", True)
  self.__pipeline.add(src)
  src.get_pad("src").link(srcpad)
  src.set_state(STATE_PLAYING)

On Fri, 2011-06-17 at 18:35 -0400, Mystilleef wrote:
> 2011/6/17 Olivier Crête <olivier.crete at collabora.com>:
> > Hi,
> >
> > On Fri, 2011-06-17 at 18:04 -0400, Mystilleef wrote:
> >> On Fri, Jun 17, 2011 at 5:51 PM, Tiago Katcipis <katcipis at inf.ufsc.br> wrote:
> >> >> ========================================================================
> >> >>        def __stream_created_cb(self, channel, stream):
> >> >>                print "Start of stream created!"
> >> >>                stream.connect("src-pad-added", self.__src_pad_added_cb)
> >> >>                srcpad = stream.get_property ("sink-pad")
> >> >>                from gst import element_factory_make, STATE_PLAYING
> >> >>                src = element_factory_make("audiotestsrc")
> >> >>                src.get_pad("src").link(srcpad)
> >> >>                src.set_property("is-live", True)
> >> >>                src.set_state(STATE_PLAYING)
> >> >>                self.__pipeline.add(src)
> >> >
> >> > here it seems to be the problem, self.__pipeline.add(src) and
> >> > src.set_state(STATE_PLAYING) should be called before you call
> >> > src.get_pad("src").link(srcpad). You can link pads of elements that belong
> >> > to the same pipeline (bin) and are on the same state.
> >>
> >> I think you're right. I also had to set "STATE_PLAYING" in an idle handler.
> >
> > You don't have to change the state in a idle handler, it should matter.
> >
> 
> It crashes with the following error if I don't put it in an idle handler
> 
> ===================================================================================================
> (run:14061): GStreamer-CRITICAL **:
> Trying to dispose element autoaudiosrc0, but it is in PLAYING instead
> of the NULL state.
> You need to explicitly set elements to the NULL state before
> dropping the final reference, to allow them to clean up.
> This problem may also be caused by a refcounting bug in the
> application or some element.
> 
> (run:14061): tp-fs-DEBUG: stream 0 0xa25b020 (audio)
> _tf_stream_bus_message: Codecs changed
> (run:14061): tp-fs-DEBUG: stream 0 0xa25b020 (audio)
> _tf_stream_try_sending_codecs: called (send_local:0 send_supported:0)
> (run:14061): tp-fs-DEBUG: stream 0 0xa25b020 (audio)
> _tf_stream_try_sending_codecs: 0: audio PCMU clock:8000 channels:0
> (run:14061): tp-fs-DEBUG: stream 0 0xa25b020 (audio)
> _tf_stream_try_sending_codecs: 101: audio telephone-event clock:8000
> channels:0 events=0-15
> (run:14061): tp-fs-DEBUG: stream 0 0xa25b020 (audio)
> _tf_stream_bus_message: Send codec changed: 0: audio PCMU clock:8000
> channels:0 params:(nil)
> fish: Job 1, “./run ” terminated by signal SIGSEGV (Address boundary error)
> ==========================================================================================

-- 
Olivier Crête
olivier.crete at collabora.com
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