js+HTML5实现视频截图的方法
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:
<videoid="video"controls="controls"> <sourcesrc=".mp4"/> </video> <buttonid="capture">Capture</button> <divid="output"></div>
2.点击按钮时触发如下代码:
(function(){ "usestrict"; varvideo,$output; varscale=0.25; varinitialize=function(){ $output=$("#output"); video=$("#video").get(0); $("#capture").click(captureImage); }; varcaptureImage=function(){ varcanvas=document.createElement("canvas"); canvas.width=video.videoWidth*scale; canvas.height=video.videoHeight*scale; canvas.getContext('2d') .drawImage(video,0,0,canvas.width,canvas.height); varimg=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。