title: How obtain codec info of an HTML5 video from JavaScript?
body: <p>I want to know the video codec and, mainly, the audio codec used to encode an HTML5 video because, for example, Firefox supports MP4 video but, in its Windows version, if the audio is encoded with "sowt" the sound will not work. In this cases I can provide a WEBM source, but I have to know if there is a problem with the MP4 source first.</p>
  
  <p>I found <a href="http://www.w3schools.com/tags/av_prop_audiotracks.asp" rel="noreferrer">this</a> but it is an IE11 property not implemented yet in other browsers.</p>
  
  <p>What do you think? Is this possible?</p>
  
  <p>Thank you in advance.</p>