<!doctype html> <html> <head> <meta charset="utf-8"> <title>Video视频截图</title> <style> body, h1, h2, p { margin:0; padding:0; } html { font-family:"微软雅黑"; background-color:#e9e9e9; } h1 { font-size:24px; font-weight:normal; padding:20px 0; text-align:center; color:#858585; background:-webkit-linear-gradient(rgba(0, 186, 255, .8), rgba(0, 130, 255, .8)); border-bottom:1px solid #009cff; color:#FFF; margin-bottom:50px; } video { display:block; margin:0 auto 30px auto; } canvas { display:none; } button { display:block; width:480px; height:50px; font-size:24px; margin:0 auto; border:1px solid #0085ff; color:#FFF; background:-webkit-linear-gradient(rgba(80, 170, 255, .8), rgba(0, 132, 255, .8)); cursor:pointer; border-radius:5px; margin-bottom:30px; } button:hover { background:-webkit-linear-gradient(rgba(0, 132, 255, .8), rgba(80, 170, 255, .8)); border-color:#1988ff; } h2, p { width:480px; margin:0 auto; color:#858585; } h2 { margin-bottom:1em; font-size:18px; } p { font-size:14px; line-height:24px; } </style> <script> window.onload = function () { var button = document.querySelectorAll('.screen')[0]; var video = document.querySelectorAll('video')[0]; var canvas = document.querySelectorAll('canvas')[0]; var ctx = canvas.getContext('2d'); var width = 480; var height = 270; canvas.width = width; canvas.height = height; video.src = 'video/temp.mp4?t=' + new Date().getTime(); video.width = width; video.height = height; video.controls = true; video.autoplay = true; video.loop = true; button.onclick = function () { ctx.drawImage(video, 0, 0, width, height); // 将video中的数据绘制到canvas里 saveImage(canvas, 'screen_' + new Date().getTime() + '.png'); // 存储图片到本地 }; }; function saveImage (canvas, filename) { var image = canvas.toDataURL('image/png').replace('image/png', 'image/octet-stream'); saveFile(image, filename || 'file_' + new Date().getTime() + '.png'); } function saveFile(data, filename) { var save_link = document.createElementNS('http://www.w3.org/1999/xhtml', 'a'); save_link.href = data; save_link.download = filename; var event = document.createEvent('MouseEvents'); event.initMouseEvent('click', true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null); save_link.dispatchEvent(event); } </script> </head> <body> <h1>Video视频截图</h1> <video>仅支持H264格式MP4</video> <canvas></canvas> <button class="screen">截图</button> <h2>当前，video 元素支持三种视频格式：</h2> <p>Ogg = 带有 Theora 视频编码和 Vorbis 音频编码的 Ogg 文件</p> <p>MPEG4 = 带有 H.264 视频编码和 AAC 音频编码的 MPEG 4 文件</p> <p>WebM = 带有 VP8 视频编码和 Vorbis 音频编码的 WebM 文件</p> </body> </html>