mediaelement.js - Show Duration Before Pressing Play

How do I show the du开发者_StackOverflow社区ration of an MP3 file in the player when the page loads (before clicking the Play button)? Right now it shows 00:00 until I click play.

My code:

<audio id="player2" src="/mp3/myfile.mp3" type="audio/mp3" controls="controls"></audio> 
<script>$('audio').mediaelementplayer();</script> 

---

<audio id="player2" src="/mp3/myfile.mp3" type="audio/mp3" controls="controls"></audio> 
<script>$('audio').mediaelementplayer({duration:120});</script>