title: Render GUI above omxplayer on Raspberry Pi 3
body: <p>currently I am trying to show my own UI and a third party virtual keyboard above the video which is displayed by omxplayer.
  I am using a Raspberry Pi 3 (which is the reason for using omxplayer).</p>
  
  <p>I am starting omxplayer from command line. I found the <code>--layer n</code> option but however it does not seem to change anything.</p>
  
  <p>Did anyone ever come across something similar?</p>
  
  <p>Thanks in advance</p>