代码示例:(标识:eg_html5_av_event_loadeddata)
<!DOCTYPE html> 
<html> 
<body> 

<video id="video1" controls="controls">
  <source src="/static/demo/video/mov_bbb.mp4" type="video/mp4">
  <source src="/static/demo/video/mov_bbb.ogg" type="video/ogg">
  Your browser does not support HTML5 video.
</video>

<script>
myVid=document.getElementById("video1");
myVid.onloadeddata=alert("Browser has loaded the current frame");
</script> 

</body> 
</html>
运行结果: