festFilenameAudio, function (typeAudio, dataAudio)
              {
                  MediaSourceUtil.fetchManifestAndData(test, manifestFilenameVideo, function (typeVideo, dataVideo)
                  {
                      var sourceBufferAudio = mediaSource.addSourceBuffer(typeAudio);
                      var sourceBufferVideo = mediaSource.addSourceBuffer(typeVideo);

                      test.expectEvent(sourceBufferAudio.audioTracks, "addtrack");
                      test.expectEvent(sourceBufferVi