如何检查用户是否在 html5 视频播放器中观看了完整视频

Question

有谁知道如何检查视频是否已完全观看？我正在使用 html5 视频播放器：

 <video width="480" height="400" controls="true" poster="">
    <source type="video/mp4" src="video.mp4"></source>
</video>

原文由 mrana 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

基本检查很简单，等待 ended 事件。这很简单，你可以用谷歌搜索它。

现在要检查用户是否 播放了完整的视频， 需要进行广泛的分析来检查他是否播放了视频的每一秒。然而，这不是必需的，用户应该足够了：

• 视频播放多少秒
• 播放到视频结尾

这个片段恰好证明了这一点。如果您只是跳到最后，视频将不会被标记为已播放完毕。一遍又一遍地播放开头也不会标记为完全播放：

 var video = document.getElementById("video");

var timeStarted = -1;
var timePlayed = 0;
var duration = 0;
// If video metadata is laoded get duration
if(video.readyState > 0)
  getDuration.call(video);
//If metadata not loaded, use event to get it
else
{
  video.addEventListener('loadedmetadata', getDuration);
}
// remember time user started the video
function videoStartedPlaying() {
  timeStarted = new Date().getTime()/1000;
}
function videoStoppedPlaying(event) {
  // Start time less then zero means stop event was fired vidout start event
  if(timeStarted>0) {
    var playedFor = new Date().getTime()/1000 - timeStarted;
    timeStarted = -1;
    // add the new number of seconds played
    timePlayed+=playedFor;
  }
  document.getElementById("played").innerHTML = Math.round(timePlayed)+"";
  // Count as complete only if end of video was reached
  if(timePlayed>=duration && event.type=="ended") {
    document.getElementById("status").className="complete";
  }
}

function getDuration() {
  duration = video.duration;
  document.getElementById("duration").appendChild(new Text(Math.round(duration)+""));
  console.log("Duration: ", duration);
}

video.addEventListener("play", videoStartedPlaying);
video.addEventListener("playing", videoStartedPlaying);

video.addEventListener("ended", videoStoppedPlaying);
video.addEventListener("pause", videoStoppedPlaying);

 #status span.status {
  display: none;
  font-weight: bold;
}
span.status.complete {
  color: green;
}
span.status.incomplete {
  color: red;
}
#status.complete span.status.complete {
  display: inline;
}
#status.incomplete span.status.incomplete {
  display: inline;
}

 <video width="200" controls="true" poster="" id="video">
    <source type="video/mp4" src="http://www.w3schools.com/html/mov_bbb.mp4"></source>
</video>

<div id="status" class="incomplete">
<span>Play status: </span>
<span class="status complete">COMPLETE</span>
<span class="status incomplete">INCOMPLETE</span>
<br />
</div>
<div>
<span id="played">0</span> seconds out of
<span id="duration"></span> seconds. (only updates when the video pauses)
</div>

同样在 jsFiddle 上： https://jsfiddle.net/p56a1r45/2/

然后，您可以将其连接到谷歌分析，以查看有多少视频用户播放过。来自 谷歌分析网站的 简单代码：

 ga('send', 'event', 'Videos', 'play', 'Video name');

原文由 Tomáš Zato 发布，翻译遵循 CC BY-SA 4.0 许可协议