Copyright: Copyright 1998-2005  W3C (MIT, ERCIM, Keio), All Rights Reserved.
See http://www.w3.org/Consortium/Legal/.
Author: Kenichi Kubota, Panasonic
           Version: Jan. 31, 2000, v1
            Module: SMIL Timing & Sync Module
           Feature: computing active duration attribute
         File Name: begin-marker.smil
  Media Components: 1 video
 Expected Behavior: play video for full 11.3s and one more of 8.6s
<smil xmlns="http://www.w3.org/2005/SMIL21/Language">
           <video src="../videos/nasa.qt" repeatDur="20s"/>