答案 0 :(得分:0)
HTML
<video id="video" width="300" height="220" autoplay></video>
<button id="snap">Take Photo</button>
<canvas id="canvas" width="300" height="220"></canvas>
JS:
<Script>
// Put event listeners into place
window.addEventListener("DOMContentLoaded", function() {
// Grab elements, create settings, etc.
var canvas = document.getElementById("canvas"),
context = canvas.getContext("2d"),
video = document.getElementById("video"),
videoObj = {
"video": true
},
errBack = function(error) {
console.log("Video capture error: ", error.code);
};
// Put video listeners into place
if (navigator.getUserMedia) { // Standard
navigator.getUserMedia(videoObj, function(stream) {
video.src = stream;
video.play();
}, errBack);
} else if (navigator.webkitGetUserMedia) { // WebKit-prefixed
navigator.webkitGetUserMedia(videoObj, function(stream) {
video.src = window.webkitURL.createObjectURL(stream);
video.play();
}, errBack);
} else if (navigator.mozGetUserMedia) { // Firefox-prefixed
navigator.mozGetUserMedia(videoObj, function(stream) {
video.src = window.URL.createObjectURL(stream);
video.play();
}, errBack);
}
document.getElementById("snap").addEventListener("click", function() {
context.drawImage(video, 0, 0, 300, 220);
});
}, false);
</Script>
适用于chrome和firefox:)
答案 1 :(得分:-1)
Look at this link。本文档不完整。它受到重大变化的影响,虽然鼓励早期试验,但它并不打算实施。
这就是为什么浏览器不能完全支持它的原因。