HTML5 - 播放视频时每隔几秒发生一次火灾事件

Question

我希望通过跟踪在不同时间间隔内丢弃的用户数来跟踪视频的用户参与度.

为此,我需要在播放视频时每15秒触发一次跟踪事件.

该playing事件被触发一次.我需要一些我可以在视频的整个生命周期中使用的东西.

var _video = $('video')[0],
        timeoutID;
    $(_video).on('playing', function(event){
        timeoutID = window.setTimeout(function() {
            console.log("video is playing");
        }, 15000);
    }).on('ended', function(event){
        console.log("video eneded");
        window.clearTimeout(timeoutID);
    });

Answer 1

您可以使用该timeupdate事件,它会在视频currentTime发生变化时更新,或者换句话说,在视频播放时更新,并为您提供用户实际看到的视频量

var _video = $('video')[0];

$(_video).on('timeupdate', function() {
    var hasPlayedTime = _video.currentTime;
});

var _video = $('video')[0];

$(_video).on('timeupdate', function(event){
  var hasPlayedTime = _video.currentTime;
    
  $('#result').html('<strong>Elapsed : </strong>' + hasPlayedTime);
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<video controls="" style="width:240px;height:180px;">
    <source src="http://www.html5rocks.com/en/tutorials/video/basics/devstories.webm" type="video/webm;codecs=&quot;vp8, vorbis&quot;" />
    <source src="http://www.html5rocks.com/en/tutorials/video/basics/devstories.mp4" type="video/mp4;codecs=&quot;avc1.42E01E, mp4a.40.2&quot;" />
</video>
<span id="result" style="position:relative; top: -100px; left: 20px"></span>

要在这样的事件上每15秒执行一次,我们需要添加一些数学和逻辑

var _video   = $('video')[0],
    debounce = true,
    seconds  = 5; // set to 15 instead

$(_video).on('timeupdate', function(event){
    var hasPlayedTime = _video.currentTime;
    var intPlayedTime = parseInt(hasPlayedTime, 10);
    var isFifteen     = intPlayedTime % seconds === 0 && intPlayedTime !== 0;
    
    if (isFifteen && debounce) {
        debounce = false;
        $('#result span').html(intPlayedTime);	
    } else {
        setTimeout(function() {
            debounce = true;
        }, 1000);
    }
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js" controls="controls"></script>
<video controls="" style="width:240px;height:180px; position: relative; top: -20px; float:left">
    <source src="http://www.html5rocks.com/en/tutorials/video/basics/devstories.webm" type="video/webm;codecs=&quot;vp8, vorbis&quot;" />
    <source src="http://www.html5rocks.com/en/tutorials/video/basics/devstories.mp4" type="video/mp4;codecs=&quot;avc1.42E01E, mp4a.40.2&quot;" />
</video>
<span id="result" style="position:relative; top: 70px; left: 20px">
    <p><u>Updates every five seconds</u></p>
    <strong>Elapsed : </strong>
    <span>0</span>
</span>