html5：在画布内显示视频

  • Z时代
  • 2024-01-10
  • 分类：问答

是否可以将html5-视频显示为画布的一部分？

基本上与您在画布上绘制图像的方式相同。

context.drawVideo(vid, 0, 0);

谢谢！

回答：

var canvas = document.getElementById(‘canvas’);

var ctx = canvas.getContext(‘2d’);

var video = document.getElementById(‘video’);

video.addEventListener('play', function () {
    var $this = this; //cache
    (function loop() {
        if (!$this.paused && !$this.ended) {
            ctx.drawImage($this, 0, 0);
            setTimeout(loop, 1000 / 30); // drawing at 30fps
        }
    })();
}, 0);

我猜上面的代码是自我解释，如果下面不加注释，我将尝试解释上面的几行代码

： 

var canvas = document.getElementById('canvas');
var ctx = canvas.getContext('2d');
var video = document.getElementById('video');
// set canvas size = video size when known
video.addEventListener('loadedmetadata', function() {
  canvas.width = video.videoWidth;
  canvas.height = video.videoHeight;
});
video.addEventListener('play', function() {
  var $this = this; //cache
  (function loop() {
    if (!$this.paused && !$this.ended) {
      ctx.drawImage($this, 0, 0);
      setTimeout(loop, 1000 / 30); // drawing at 30fps
    }
  })();
}, 0);
<div id="theater">
  <video id="video" src="http://upload.wikimedia.org/wikipedia/commons/7/79/Big_Buck_Bunny_small.ogv" controls="false"></video>
  <canvas id="canvas"></canvas>
  <label>
    <br />Try to play me :)</label>
  <br />
</div>

以上是 html5：在画布内显示视频 的全部内容， 来源链接： utcz.com/qa/405476.html

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