jwplayer - 如何在播放前获得视频时长？

Question

我想在jwplayer开始播放之前获取视频的持续时间.我尝试在onReady事件回调中调用getDuration(),但它返回-1.当我在onPlay事件回调中调用getDuration()时,我得到正确的值.有任何想法吗？

这是我的代码:

<video src="movie.mp4" id="video" width="800" height="600"></video>
<script type="text/javascript">
jwplayer ('video').setup ({
    flashplayer: '/js/mediaplayer-5.10/player.swf',
    width: 600,
    height: 400,
    events: {
        onReady: function () {
            var duration = this.getDuration();
            alert ('ready, duration: ' + duration);
        },
        onPlay: function (state) {
            alert ('play, duration: ' + this.getDuration());
        }
    }
});
</script>

Answer 1

这大约是我处理这个问题的方式:

var duration = 0;
jwplayer().onReady(function() {
  if (duration == 0) {
    // we don't have a duration yet, so start playing
    jwplayer().play();
  }
});

jwPlayer().onTime(function() {
  if (duration == 0) {
    // we don't have a duration, so it's playing so we can discover it...
    duration = jwplayer().getDuration();
    jwplayer().stop();
    // do something with duration here
  } else {
    ...
  }
}