title: Exoplayer doesnt play any video
body: <p>Have a problem getting Exoplayer to work. I managed to load the video from a url. But it only plays the audio. So i am doing something wrong.</p>
  
  <pre><code>    BandwidthMeter bandwidthMeter = new DefaultBandwidthMeter();
      TrackSelection.Factory videoTrackSelectionFactory = new AdaptiveVideoTrackSelection.Factory(bandwidthMeter);
      TrackSelector trackSelector = new DefaultTrackSelector(videoTrackSelectionFactory);
      LoadControl loadControl = new DefaultLoadControl();
      SimpleExoPlayer exoPlayer = ExoPlayerFactory.newSimpleInstance(simpleExoPlayerView.getContext(), trackSelector, loadControl);
  
      Uri mp4VideoUri = Uri.parse(videoUri);
      DefaultHttpDataSourceFactory dataSourceFactory = new DefaultHttpDataSourceFactory("ExoPlayerDemo");
      ExtractorsFactory extractor = new DefaultExtractorsFactory();
  
      MediaSource videoSource = new ExtractorMediaSource(mp4VideoUri, dataSourceFactory, extractor, null, null);
      exoPlayer.prepare(videoSource);
  
      exoPlayer.setPlayWhenReady(true);
  </code></pre>
  
  <p>This is how i where able to only play the audio. Not sure what i should change.</p>