Table of contents
Phenomenon
Sometimes the page needs to be switched and minimized; after switching back within a short period of time or within a few hours, the video can continue normally; if left for a long time, several hours or overnight, after switching back, the video may freeze
observe
Switch page:
It is relatively normal within a few hours and will not be stuck
After leaving it for one night, the page freezes. Using wireshark to observe, the traffic is still there, and the video stream is also being transmitted.
According to the printing, it is found that there are several buffer groups (printing of the code after solving)
solve
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;
}
});