本文实例讲述了js+HTML5实现视频截图的方法。分享给大家供大家参考。具体如下：
1. HTML部分：
<video id="video" controls="controls"> <source src=".mp4" /> </video> <button id="capture">Capture</button> <div id="output"></div>
2. 点击按钮时触发如下代码：
(function() {
"use strict";
var video, $output;
var scale = 0.25;
var initialize = function() {
$output = $("#output");
video = $("#video").get(0);
$("#capture").click(captureImage);
};
var captureImage = function() {
var canvas = document.createElement("canvas");
canvas.width = video.videoWidth * scale;
canvas.height = video.videoHeight * scale;
canvas.getContext('2d')
.drawImage(video, 0, 0, canvas.width, canvas.height);
var img = document.createElement("img");
img.src = canvas.toDataURL();
$output.prepend(img);
};
$(initialize);
}());
希望本文所述对大家的javascript程序设计有所帮助。
