[Bug 777915] adder, audiomixer: negotiation sometimes fails

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=777915

John Sauter <John_Sauter at systemeyescomputerstore.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|FIXED                       |---
            Summary|adder: negotiation          |adder, audiomixer:
                   |sometimes fails             |negotiation sometimes fails

--- Comment #22 from John Sauter <John_Sauter at systemeyescomputerstore.com> ---
Thank you for the pointer to the updated documetation.  It recommends using
audiomixer from gst-plugins-bad.  I found audiomixer in gst-plugins-base and
changed my test case to this, replacing adder with audiomixer:

export GST_DEBUG_FILE=gstreamer_debug.txt
gst-launch-1.0 --gst-debug=*:5 \
    fakesrc num-buffers=5 format=GST_FORMAT_TIME ! \
    audio/x-raw,rate=96000,format=S16LE,channels=1,layout=interleaved ! \
    audioresample ! \
    audiomixer name=mix ! fakesink \
    fakesrc num-buffers=5 format=GST_FORMAT_TIME ! \
    audio/x-raw,rate=48000,format=S16LE,channels=1,layout=interleaved ! \
    audioresample  ! mix.

Running on Fedora 28, which includes Gstreamer 1.14.0, negotiation still fails
about half the time.  I will compress and attach the level 5 log.

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