<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style>
#canvas,
#video {
float: left;
margin-right: 10px;
background: #fff;
}
.box {
overflow: hidden;
margin-bottom: 10px;
}
</style>
</head>
<body>
<div class="box">
<video id="video" width="400" height="400"></video>
<canvas id="canvas"></canvas>
</div>
<button id="live">直播</button>
<button id="snap">截图</button>
<script>
var video = document.getElementById('video');
var canvas = document.getElementById('canvas');
var ctx = canvas.getContext('2d');
var width = video.width;
var height = video.height;
canvas.width = width;
canvas.height = height;
function liveVideo() {
var URL = window.URL || window.webkitURL; // 获取到window.URL对象
navigator.getUserMedia({
video: true
}, function(stream) {
video.src = URL.createObjectURL(stream); // 将获取到的视频流对象转换为地址
video.play(); // 播放
//点击截图
document.getElementById("snap").addEventListener('click', function() {
ctx.drawImage(video, 0, 0, width, height);
var url = canvas.toDataURL('image/png');
document.getElementById('download').href = url;
});
}, function(error) {
console.log(error.name || error);
});
}
document.getElementById("live").addEventListener('click', function() {
liveVideo();
});
</script>
</body>
</html>
