title: No audio when streaming ac3 with Android MediaPlayer
body: <p>I've written a very simple application that loops through a list of videos and streams them from a nodejs server.</p>
  
  <p>I'm just doing your basic video streaming set up with the Android MediaPlayer API, and everything works great, except for surround sound.</p>
  
  <p>With Dolby Digital (ac3), I don't get any audio at all. I tried aac 5.1 and got audio, but it was downconverter to stereo.</p>
  
  <pre><code>public void setupVideoView(Uri videoAddress) {
      emVideoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
          @Override
          public void onPrepared(MediaPlayer mediaPlayer) {
              // Prepared Listener
          }
      });
      emVideoView.setOnErrorListener(new MediaPlayer.OnErrorListener() {
          @Override
          public boolean onError(MediaPlayer mp, int what, int extra) {
              // Error Listener
          }
      });
      emVideoView.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
          @Override
          public void onCompletion(MediaPlayer mediaPlayer) {
              setupVideoView(Uri.parse(video_url));
          }
      });
      emVideoView.setVideoURI(videoAddress);
  }
  </code></pre>
  
  <p>I've searched for hours and haven't been able to find a solution. I would expect that Android, if the audio codec isn't supported, would simply pass it through so that something else down the chain could decode it. Maybe I don't fully understand how it works? Any help is greatly appreciated.</p>