jwplayer-如何获得播放前的视频时长? [英] jwplayer - how do I get video duration before playback?

问题描述

我正在尝试在jwplayer开始播放之前获取视频的时长.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，我得到了正确的值.有什么想法吗?

I'm trying to get the duration of a video before the jwplayer starts playing. I tried calling getDuration () in the onReady event callback, but it returns -1. When I call getDuration () in the onPlay event callback, I get the correct value. Any ideas?

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>

推荐答案

这大约是我处理此问题的方式:

This is approximately how I have handled this problem:

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 {
    ...
  }
}

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