title: dash.js not playing mpd file generated by MP4Box
body: <p>I have transcoded and stripped the audio of an mp4 file as follows:</p>
  
  <p>$ ffmpeg -codec:a libvo_aacenc -ar 44100 -ac 1 -codec:v libx264 -profile:v baseline -level 13 -b:v 2000k dir/out.mp4 -i dir/original.mp4</p>
  
  <p>$ ffmpeg -i dir/out.mp4 -an dir/out_an.mp4</p>
  
  <p>I've used the following MP4Box command to generate a mpd:</p>
  
  <p>$ MP4Box -dash 30000 -dash-profile on-demand -segment-name out-seg -out dir/out_dash dir/out.mp4</p>
  
  <p>This results in the following mpd file:</p>
  
  <pre><code>&lt;?xml version="1.0"?&gt;
  &lt;!-- MPD file Generated with GPAC version 0.5.1-DEV-rev4065 --&gt;
  &lt;MPD xmlns="urn:mpeg:dash:schema:mpd:2011" minBufferTime="PT1.500000S"    type="static" mediaPresentationDuration="PT0H2M11.77S" profiles="urn:mpeg:dash:profile:full:2011"&gt;
   &lt;ProgramInformation moreInformationURL="http://gpac.sourceforge.net"&gt;
    &lt;Title&gt;dashtest/output_dash.mpd generated by GPAC&lt;/Title&gt;
   &lt;/ProgramInformation&gt;
  
   &lt;Period id="" duration="PT0H2M11.77S"&gt;
    &lt;AdaptationSet segmentAlignment="true" maxWidth="640" maxHeight="360" maxFrameRate="30000/1001" par="16:9"&gt;
     &lt;ContentComponent id="1" contentType="video"  lang="und"/&gt;
     &lt;ContentComponent id="2" contentType="audio"  lang="und"/&gt;
     &lt;Representation id="1" mimeType="video/mp4" codecs="avc1.42c00d,mp4a.40.02" width="640" height="360" frameRate="30000/1001" sar="1:1" audioSamplingRate="44100" startWithSAP="0" bandwidth="2097272"&gt;
      &lt;AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/&gt;
      &lt;SegmentList timescale="1000" duration="30046"&gt;
       &lt;Initialization sourceURL="out-seginit.mp4"/&gt;
       &lt;SegmentURL media="out-seg1.m4s"/&gt;
       &lt;SegmentURL media="out-seg2.m4s"/&gt;
       &lt;SegmentURL media="out-seg3.m4s"/&gt;
       &lt;SegmentURL media="out-seg4.m4s"/&gt;
       &lt;SegmentURL media="out-seg5.m4s"/&gt;
      &lt;/SegmentList&gt;
     &lt;/Representation&gt;
    &lt;/AdaptationSet&gt;
   &lt;/Period&gt;
  &lt;/MPD&gt;
  </code></pre>