title: Wpf mediaelement playing video withouth sound
body: <p>I want to create my own video player application using a MediaElement control in WPF using MVVM. But whenever I try to open a media (.mkv) as source, the video starts playing without any sound.</p>
  
  <p>When I put an .mp3 as source, I can hear the music playing so that's why it is strange.
  Also, the video has sound in an other player (Kodi).</p>
  
  <p>The XAML code for the control:</p>
  
  <pre><code>&lt;MediaElement LoadedBehavior="Play" UnloadedBehavior="Manual"
                Source="{Binding Media}" Volume="1"/&gt;
  </code></pre>
  
  <p>The code for the binding:</p>
  
  <pre><code>public System.Uri Media =&gt; new System.Uri(@"d:\video.mkv");
  </code></pre>
  
  <p>What shall be a way to hear the sound of the video?</p>