目录

现象

观察

 解决

---

现象

  页面有时候要切换，要最小化；短时间或者几个小时内切换回来，视频可以正常续上；而放置较长时间，几个小时或者一晚上，切换回来后，视频可能卡死

观察

切换页面：

几个小时内都比较正常，不会卡死 

 放置一个晚上后，页面卡死，使用wireshark观察，流量依旧在，而视频流也在传

根据打印发现有几个缓冲组(解决后的代码打印）

 

 解决

document.addEventListener('visibilitychange', function(){
        var bufferedTimeRanges = _SELF.video_object.buffered;

        for (var i = 0; i < bufferedTimeRanges.length; i++) {
            var start = bufferedTimeRanges.start(i);
            var end = bufferedTimeRanges.end(i);
            console.log("已缓冲时间段：" + start + " - " + end);
        }
        if (_SELF.videoBeginTime) {
          _SELF.IntervelNum = parseInt((new Date().getTime() - _SELF.videoBeginTime) / 40)
          _SELF.delayData = []
        }
        if (_SELF.pagePaused) {
          var videoBuffered = _SELF.video_object.buffered;
          console.log("videoBuffered.length",videoBuffered.length)
          if (videoBuffered.length > 0) {
            let videoEnd = videoBuffered.end(videoBuffered.length-1);
            console.log("videoEnd - _SELF.video_object.currentTime",videoEnd ,_SELF.video_object.currentTime)
            if (videoEnd - _SELF.video_object.currentTime > 0.15) {
              _SELF.video_object.currentTime = videoEnd - 0.1;
            }
          }
          var audioBuffered = _SELF.audio_object.buffered;
          if (audioBuffered.length > 0) {
            let audioEnd = audioBuffered.end(audioBuffered.length-1);
            if (audioEnd - _SELF.audio_object.currentTime > 0.15) {
              _SELF.audio_object.currentTime = audioEnd - 0.1;
            }
          }
          _SELF.pagePaused = false;
        }
      });