title: Best he-aac encoder on linux?
body: <p>I need an encoder that can convert mp3 files to he-aac (aka aac+).
  So far the best one I have found is <a href="http://www.nero.com/eng/down-ndaudio.php" rel="nofollow noreferrer">nero aac encoder</a> . 
  I have two problemes with it :
    - Only one input format : wav . It is a little bit slow to transform mp3 files to wav and then to he-aac.
    - a free license for <strong>non commercial</strong> use.</p>
  
  <p>Too bad ffmpeg does not support he-aac ...
  There is a commercial solution, <a href="https://flix.on2.com/" rel="nofollow noreferrer">on2 flix</a>, but it seems to be a golden hammer for the simple task I need to do.</p>