[Bug 796172] New: audiolatency cannot be used with rtpbin because this creates loop in pipeline

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=796172

            Bug ID: 796172
           Summary: audiolatency cannot be used with rtpbin because this
                    creates loop in pipeline
    Classification: Platform
           Product: GStreamer
           Version: 1.14.0
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: bugzilla at poradnik-webmastera.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

I have app which uses rtpbin to both send and receive RTP streams. I wanted to
use new audiolatency element to measure delay of external VoIP server. However
it turned out that I cannot use it together with rtpbin, because this creates
loop in pipeline. Here are errors reported by my app:

1526484976.964529 1003: Pipeline error: Internal data stream error.
(gstbasesrc.c(3055): gst_base_src_loop ():
/GstPipeline:pipeline0/GstAudioLatency:audiolatency0/GstAudioTestSrc:audiotestsrc0:
streaming stopped, reason not-linked (-1))
1526484976.964638 1003: Pipeline error: Internal data stream error.
(gstqueue.c(988): gst_queue_handle_sink_event ():
/GstPipeline:pipeline0/GstQueue:queue2:
streaming stopped, reason not-linked (-1))

Please add new elements audiolatencysrc and audiolatencysink, which would
communicate together "behind the scenes" and appear to GStreamer as a two
separate elements. This will allow to use audiolatency together with rtpbin.

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