title: Python bindings for libVLC - cannot change audio output device
body: <p>VLC 2.2.3, python-vlc 1.1.2.</p>
  
  <p>I have a virtual audio output and am trying to get libVLC to output on it. So far, I can see the virtual output appearing in libVLC, but selecting it makes audio play on the default output (i.e. the speakers).</p>
  
  <p>This is the relevant part of what I have:</p>
  
  <pre><code>self.Instance = vlc.Instance()
  self.player = self.Instance.media_player_new()
  
  devices = []
  mods = self.player.audio_output_device_enum()
  
  if mods:
      mod = mods
      while mod:
          mod = mod.contents
          devices.append(mod.device)
          mod = mod.next
  
  vlc.libvlc_audio_output_device_list_release(mods)
  
  # this is the part I change on each run of the code.
  self.player.audio_output_device_set(None, devices[0]) 
  </code></pre>
  
  <p>I've run the code multiple times, changing the device ID as per the code comment. However, the output device doesn't actually change. This is a headache for two reasons:</p>
  
  <p>1) audio_output_device_set() doesn't return anything. I can't tell if I'm actually accomplishing anything when I run this function.
  2) I can't even run audio_output_device_get() to check if the set function is doing anything as this is only for libvlc 3. I would prefer for my program to work with 2.2.3.</p>
  
  <p>So, what I did next was install VLC 3.0 and run the above code with it. Now, audio_output_device_get() works and I can see that the set function is actually changing the output device to the virtual output. But sound STILL plays on the speakers.</p>
  
  <p>What's going on? How do I fix this?</p>
  
  <p>I asked at the VLC forums and got a singularly unhelpful reply telling me to 'check logs and documentation'. That's it. I've been superglued to the rather lacking documentation to get this far. Even though I doubt it can help, I've decided to try logging. I thought it would be as simple as calling <code>libvlc_log_set_file</code> but it needs a libVLC file pointer, and I don't know how to create one with a name and mode as in Python.</p>
  
  <p>tl;dr:</p>
  
  <p>1) How do I successfully change the audio output device?
  2) How do I set up maximum verbosity logging?</p>