div>
        <script>
          // Audio / Video files supported by the user agent under test
          var subType = MediaSourceUtil.getSubType(MediaSourceUtil.AUDIO_ONLY_TYPE);
          var manifestFilenameAudio = subType + "/test-a-128k-44100Hz-1ch-manifest.json";
          var manifestFilenameVideo = subType + "/test-v-128k-320x240-30fps-10kfr-manifest.json";
          var manifestFilenameAV = subType + "/test-av-384k-44100Hz-1ch-320x240-30fps-10kfr-manifest.json";

          mediasource_test(function(