title: html5 video tag codecs attribute
body: <p>I am trying to specify a specific video/audio codec in the video tag using</p>
  
  <pre><code>&lt;video poster="movie.jpg" controls&gt;
      &lt;source src="movie.mp4" type='video/mp4; codecs="avc1.4D401E, mp4a.40.2"'/&gt;
      &lt;p&gt;This is fallback content&lt;/p&gt;
  &lt;/video&gt;
  </code></pre>
  
  <p>but can't find the right codecs statement to play the video , i have downloaded a video analyser and can see that its an avc1 and can see that the audio map.40.2 but can work out the rest of the codec, what does the 4d401e mean in the above ?</p>
  
  <p>Cheers
  Toby </p>