JavaScripts调用摄像头【MediaDevices.getUserMedia()】
h5调用摄像头(允许自定义界面)【MediaDevices.getUserMedia()】
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> <style> .video-wrapper{ position: relative; } .mask{ position: absolute; top: 0; bottom: 0; left: 0; right: 0; background-color: rgba(0, 0, 0, .6); } .content{ position: absolute; top: 30px; bottom: 30px; left: 30px; right: 30px; z-index: 9; } </style> </head> <body> <div class="video-wrapper"> <div class="mask"></div> <div class="content"> <video id="video" width="480" height="320" controls> </video> </div> </div> <div> <button id="capture">拍照</button> </div> <canvas id="canvas" width="480" height="320"></canvas> <script> //访问用户媒体设备的兼容方法 function getUserMedia(constraints, success, error) { if (navigator.mediaDevices.getUserMedia) { //最新的标准API navigator.mediaDevices.getUserMedia(constraints).then(success).catch(error); } else if (navigator.webkitGetUserMedia) { //webkit核心浏览器 navigator.webkitGetUserMedia(constraints,success, error) } else if (navigator.mozGetUserMedia) { //firfox浏览器 navigator.mozGetUserMedia(constraints, success, error); } else if (navigator.getUserMedia) { //旧版API navigator.getUserMedia(constraints, success, error); } } let video = document.getElementById('video'); let canvas = document.getElementById('canvas'); let context = canvas.getContext('2d'); function success(stream) { //兼容webkit核心浏览器 let CompatibleURL = window.URL || window.webkitURL; //将视频流设置为video元素的源 console.log(stream); //video.src = CompatibleURL.createObjectURL(stream); video.srcObject = stream; video.play(); } function error(error) { console.log(`访问用户媒体设备失败${error.name}, ${error.message}`); } if (navigator.mediaDevices.getUserMedia || navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia) { //调用用户媒体设备, 访问摄像头 getUserMedia({video : {width: 480, height: 320}}, success, error); } else { alert('不支持访问用户媒体'); } document.getElementById('capture').addEventListener('click', function () { context.drawImage(video, 0, 0, 480, 320); }) </script> </body> </html>