Audio dB overlay on video

[Baby Octopus]

Hi,

I'm looking to overlay the audio's dB over video, something like the
following pipeline

gst-launch-1.0 v4l2src ! videoconvert ! audiooverlay ! autovideosink alsasrc
! level ! fakesink

Here the level element will post messages in bus which the audiooverlay
element needs to read this msg and overlay the graphics(something like
http://www.djfrankieb.net/AudioStereoLoudnessVUMeter.gif)

Any suggestion is highly appreciated :)

~BO



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