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multiCam.html
:<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> </head> <video id="video" width="400" height="400" style="background-color: coral;"></video> <video id="video1" width="400" height="400" style="background-color: chartreuse;"></video> <p> <canvas id="canvas1" width="400" height="400" style="background-color: blueviolet;"></canvas> <canvas id="canvas1" width="400" height="400" style="background-color: brown;"></canvas> </p> <body> <script src="./multiCam.js"></script> </body> </html>
multiCam.js
:// 获取页面视频元素
var video = document.getElementById('video');
var video1 = document.getElementById('video1');
navigator.mediaDevices.enumerateDevices().then(getMyDevices).catch(handleError);
// 遍历所有的设备,包括视频和音频设备,找出 RGB相机设备。
function getMyDevices(deviceInfos) {
let constraints = new Array(
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