谷歌瀏覽器呼叫攝像頭並拍照
阿新 • • 發佈：2018-11-28
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>攝像頭拍照</title> </head> <body> <video id="video" width="480" height="320" controls> </video> <div> <button id="capture">拍照</button> </div> <canvas id="canvas" width="480" height="320"></canvas> <script> //訪問使用者媒體裝置的相容方法 function getUserMedia(constraints, success, error) { if (navigator.mediaDevices.getUserMedia) { //最新的標準API navigator.mediaDevices.getUserMedia(constraints).then(success).catch(error); } else if (navigator.webkitGetUserMedia) { //webkit核心瀏覽器 navigator.webkitGetUserMedia(constraints,success, error) } else if (navigator.mozGetUserMedia) { //firfox瀏覽器 navigator.mozGetUserMedia(constraints, success, error); } else if (navigator.getUserMedia) { //舊版API navigator.getUserMedia(constraints, success, error); } } let video = document.getElementById('video'); let canvas = document.getElementById('canvas'); let context = canvas.getContext('2d'); function success(stream) { //相容webkit核心瀏覽器 let CompatibleURL = window.URL || window.webkitURL; //將視訊流設定為video元素的源 console.log(stream); //video.src = CompatibleURL.createObjectURL(stream); video.srcObject = stream; video.play(); } function error(error) { console.log(`訪問使用者媒體裝置失敗${error.name}, ${error.message}`); } if (navigator.mediaDevices.getUserMedia || navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia) { //呼叫使用者媒體裝置, 訪問攝像頭 getUserMedia({video : {width: 480, height: 320}}, success, error); } else { alert('不支援訪問使用者媒體'); } document.getElementById('capture').addEventListener('click', function () { context.drawImage(video, 0, 0, 480, 320); }) </script> </body> </html>