title: mkvtoolnix bulk remove audio tracks
body: <p>i want to save some space on my NAS and remove unnecessary Tracks.
  i found <a href="http://forum.videohelp.com/threads/343271-BULK-remove-non-English-tracks-from-MKV-container?p=2201831&amp;viewfull=1#post2201831" rel="nofollow">this Script</a>
  but my debian (nas os) doesnt support mkvtoolnix 6.6.0 and higher</p>
  
  <p>my output is descriped <a href="https://www.doom9.org/showthread.php?p=1573620" rel="nofollow">here at "old output"</a>.
  and the script uses the new output</p>
  
  <p>i think in the script "AUDIO_RE" has to be redefined to fit my needs.</p>
  
  <pre><code>AUDIO_RE    = re.compile(r"Track ID (\d+): audio \([A-Z0-9_/]+\) [language:[a-z]{3}?")
  </code></pre>
  
  <p>thats what i got so far... but the script doesnt work</p>
  
  <p>what can i do ?</p>