是否可以使用不适用于视频的 PIP 模式? [英] Is it possible to use PIP mode which is not for videos?

问题描述

我想将 div 类显示为 PiP(画中画).我用谷歌搜索了很多，但只知道如何在视频中启用，而不是自定义 div.

I want to show a div class as PiP(Picture in Picture). I have googled a lot, but only how to enable in videos, not a custom div.

在我的环境中，js、CSS和HTML都可以使用.我想使用 PiP 的 div 逐秒变化.

At my environment, js, CSS and HTML can be used. A div that I want to use PiP changes second by second.

推荐答案

不，画中画仅适用于

Nope PiP is available for <video> only.

您可以做的是在

const target = document.getElementById('target');
const source = document.createElement('canvas');
const ctx = source.getContext('2d');
ctx.font = "50px Arial";
ctx.textAlign = "center";
ctx.textBaseline = "middle";
anim();

const stream = source.captureStream();
target.srcObject = stream;

const btn = document.getElementById('btn');
if( target.requestPictureInPicture ) {
  btn.onclick = e => target.requestPictureInPicture();
}
else {
  btn.disabled = true;
}

function anim() {
  ctx.fillStyle = "white";
  ctx.fillRect( 0, 0, source.width, source.height );
  ctx.fillStyle = "black";
  ctx.fillText( new Date().toTimeString().split(' ')[0], source.width / 2, source.height / 2 );
  requestAnimationFrame( anim );
}

<video id="target" controls muted autoplay></video>
<button id="btn">request PiP</button>

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