我希望从视频文件中提取海报图像,并希望在网页上使用这个图像。
我的技术栈包括spring mvc、hibernate、jpa、jQuery、jsp、html5和css3。
有人可以指导我如何做吗?
我希望从视频文件中提取海报图像,并希望在网页上使用这个图像。
我的技术栈包括spring mvc、hibernate、jpa、jQuery、jsp、html5和css3。
有人可以指导我如何做吗?
根据@sjm的建议,我尝试使用Popcorn.capture,并尝试以下代码,它可以解决问题。
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<title>Popcorn.capture.js Functional Examples</title>
<script src="http://cdn.popcornjs.org/code/dist/popcorn.min.js"></script>
<script src="../src/popcorn.capture.js"></script>
</head>
<body onload="myFunction()">
<div id="unmoved-fixture">
<video height="180" width="300" id="video-target" controls>
<source src="assets/popcorntest.mp4"></source>
<source src="assets/popcorntest.ogv"></source>
<source src="assets/popcorntest.webm"></source>
</video>
</div>
<pre>
</pre>
<script>
function myFunction() {
var $pop = Popcorn( "#video-target" ),
poster;
$pop.capture({
at: 10
});
}
</script>
</body>
</html>
以上代码从视频的第10秒捕获图像并为视频创建海报图像。
您可以从https://github.com/rwaldron/popcorn.capture/tree/master/src获取popcorn.capture.js。
可以使用HTML5和Canvas实现
Github 这里
在这里查看演示这里
更多详情请看 - 使用Canvas从HTML5视频创建屏幕截图
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Taking screengrabs from video in Canvas</title>
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<style>
*{margin:0;padding:0;font-size:15px;font-family:calibri,arial,sans-serif}
footer,section,header{display:block;}
body{padding:2em;background:#666;color:#fff;}
h1{font-size:24px;margin:10px 0;}
h2{font-size:18px;margin:10px 0;color:lime;}
canvas{display:block;border:2px solid #000;}
#video,#canvas{float:left;padding-right:10px;}
#video{width:640px;}
#save li{list-style:none;margin:0;padding:0}
#save{clear:both;padding:10px 0;overflow:auto;}
#save img{float:left;padding-right:5px;padding-bottom:5px;}
footer a{color:lime;}
footer p{margin:5em 0 1em 0;padding:1em 0;border-top:1px solid #999}
</style>
</head>
<body>
<header><h1>Taking screengrabs from video in Canvas (Chrome, Mozilla, Opera, Safari - maybe IE (got no windows))</h1></header>
<section>
<p>Simply play the video. Every time you pause, you can see the screenshot on the right. Click the screenshot to store it in your collection below.</p>
<div id="video">
<h2>The Video:</h2>
<video controls>
<source src="meetthecubs.mp4" type="video/mp4"></source>
<source src="meetthecubs.webm" type="video/webm"></source>
</video>
</div>
<div id="canvas">
<h2>Preview (click to store images below):</h2>
<canvas></canvas>
</div>
<div id="save">
<h2>Your saved images:</h2>
<ul></ul>
</div>
</section>
<footer>
<p>Written by
<a href="http://wait-till-i.com/">Chris Heilmann</a> -
<a href="http://twitter.com/codepo8">@codepo8</a>
</p>
</footer>
<script>
(function(){
var v = document.querySelector('video'),
n = document.querySelector('source').src.replace(/.*\/|\..*$/g,''),
c = document.querySelector('canvas'),
save = document.querySelector('#save ul'),
ctx = c.getContext('2d');
v.addEventListener('loadedmetadata',function(ev){
var ratio = v.videoWidth/v.videoHeight,
w = 400,
h = parseInt(w / ratio, 10),
time = 0,
img = null,
li = null;
c.width = w;
c.height = h + 40;
v.addEventListener('timeupdate',function(ev){
if(v.paused){
ctx.fillStyle = 'rgb(0, 0, 0)';
ctx.fillRect(0, 0, w, h);
ctx.drawImage(v, 0, 40, w, h);
ctx.font = '20px Calibri';
ctx.fillStyle = 'lime';
ctx.fillText(n, 5, 20);
time = format(v.currentTime);
ctx.fillStyle = 'white';
ctx.fillText(time, 395 - ctx.measureText(time).width, 20);
}
},false);
c.addEventListener('click',function(ev){
li = document.createElement('li');
img = document.createElement('img');
li.appendChild(img);
save.appendChild(li);
img.src = ctx.canvas.toDataURL('image/png');
},false);
},false);
function format(time){
var hours = parseInt((time / 60 / 60) % 60, 10),
mins = parseInt((time / 60) % 60, 10),
secs = parseInt(time, 10) % 60,
hourss = (hours < 10 ? '0' : '') + parseInt(hours, 10) + ':',
minss = (mins < 10 ? '0' : '') + parseInt(mins, 10) + ':',
secss = (secs < 10 ? '0' : '') +(secs % 60),
timestring = ( hourss !== '00:' ? hourss : '' ) + minss + secss;
return timestring;
};
})();
</script>
</body>
</html>
确保您的视频源正确。
v.setAttribute('crossOrigin','anonymous');
- Akshay Hazari