<video id="video" controls="controls"> <source src=".mp4" /> </video> <button id="capture">Capture</button> <div id="output"></div>
上述代码实现加载html,video标签是html5的标签可以在浏览器上直接加载视频并播放
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);
上述代码实现从video加载一附图片并画出实现转换img
原文：http://www.cnblogs.com/yang95/p/4842141.html