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效果图: 整体效果: 视频加载:
拍照: 第一步:创建HTML元素 首先,我们要创建一个HTML5的文档。 <!doctype html> <html> <head> <meta charset="utf-8"> <title>无标题文档</title> </head> <body> </body> </html> 然后在 <video id="video" width="640" height="480" autoplay></video> <button id="snap">截图</button> <canvas id="canvas" width="640" height="480"></canvas> 第二步:创建JavaScript 首先,要在 <script language="javascript"> // Grab elements, create settings, etc. var video = document.getElementById('video'); // Get access to the camera! if(navigator.mediaDevices && navigator.mediaDevices.getUserMedia) { // Not adding `{ audio: true }` since we only want video now navigator.mediaDevices.getUserMedia({ video: true }).then(function(stream) { //video.src = window.URL.createObjectURL(stream); video.srcObject = stream; video.play(); }); } /* Legacy code below: getUserMedia else if(navigator.getUserMedia) { // Standard navigator.getUserMedia({ video: true }, function(stream) { video.src = stream; video.play(); }, errBack); } else if(navigator.webkitGetUserMedia) { // WebKit-prefixed navigator.webkitGetUserMedia({ video: true }, function(stream){ video.src = window.webkitURL.createObjectURL(stream); video.play(); }, errBack); } else if(navigator.mozGetUserMedia) { // Mozilla-prefixed navigator.mozGetUserMedia({ video: true }, function(stream){ video.srcObject = stream; video.play(); }, errBack); } */ </script> 随后,要在刚才创建的HTML元素的后面插入以下代码: <script language="javascript"> // Elements for taking the snapshot var canvas = document.getElementById('canvas'); var context = canvas.getContext('2d'); var video = document.getElementById('video'); // Trigger photo take document.getElementById("snap").addEventListener("click", function() { context.drawImage(video, 0, 0, 640, 480); }); </script> 现在,这个HTML就可以完成打开摄像头,和拍照的功能了! 到此这篇关于如何在HTML里加载摄像头的方法的文章就介绍到这了,更多相关html加载摄像头内容请搜索极客世界以前的文章或继续浏览下面的相关文章,希望大家以后多多支持极客世界! |
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