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;
...