[Bug 709871] New: 'level' element returns NULL values for rms, peak, and decay

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=709871
  GStreamer | gst-plugins-good | git

           Summary: 'level' element returns NULL values for rms, peak, and
                    decay
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: gschriss at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


The 'level' element returns NULL values for rms, peak, and decay when called
from gst-launch and/or Gst.parse_launch().  Built against glib-2.38.0,
adversely affects audio waveform generation in PiTiVi.



Works:
GST_DEBUG=GST_BUS:5 gst-launch-0.10 audiotestsrc ! audioconvert ! level
name=wavelevel interval=10000000 ! fakesink qos=false name=faked 2>&1
>/dev/null |grep peak |grep dispatch | sed 's/^.*rms/rms/g'
-->
rms=(double){ -4.9581484531276319 }, peak=(double){ -1.9382024715915944 },
decay=(double){ -1.9382024715915944 };
rms=(double){ -4.9132681242674376 }, peak=(double){ -1.9382024715915944 },
decay=(double){ -1.9382024715915944 };
...


./gst-plugins-good_1.x-git/tests/examples/level/level-example
-->
endtime: 0:00:00.100000000, channels: 2
channel 0
    RMS: -4.948984 dB, peak: -1.938333 dB, decay: -1.938333 dB
    normalized rms value: 0.565654
channel 1
    RMS: -4.948985 dB, peak: -1.938333 dB, decay: -1.938333 dB
    normalized rms value: 0.565654
...


Doesn't work as expected:
GST_DEBUG=GST_BUS:5 gst-launch-1.0 audiotestsrc ! audioconvert ! level !
fakesink 2>&1 >/dev/null | grep peak | grep dispatch | sed 's/^.*rms/rms/g'
-->
rms=(GValueArray)NULL, peak=(GValueArray)NULL, decay=(GValueArray)NULL;
rms=(GValueArray)NULL, peak=(GValueArray)NULL, decay=(GValueArray)NULL;
...

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