[Bug 793081] New: GStreamer crashes when volume is set to 0 for raw PCM audio data with sink timestamp sync turned off

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=793081

            Bug ID: 793081
           Summary: GStreamer crashes when volume is set to 0 for raw PCM
                    audio data with sink timestamp sync turned off
    Classification: Platform
           Product: GStreamer
           Version: 1.x
                OS: Mac OS
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-base
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: mikheev at amazon.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Our raw PCM data does not have timestamps for the pipeline and it causes volume
plugin to crash with messages complaining about a timestamp expected when we
set the volume to 0 or mute. Note that we use autoaudiosink with "sync=false"
option.

How to reproduce:

gst-launch-1.0 -v filesrc location=rawpcm.wav ! decodebin ! queue !
audioconvert ! volume volume=0 ! autoaudiosink sync=false

The version of this with volume set to non-zero value actually works:
gst-launch-1.0 -v filesrc location=rawpcm.wav ! decodebin ! queue !
audioconvert ! volume volume=1 ! autoaudiosink sync=false

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