多了不说，少了不唠
截取效果取消：
代码：video/index.html
<!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>视频帧截取</title> </head> <body> <!-- <input type="file" id="upload-ipt" @change="chooseVideo" accept="video/*" /> <div id="box" style="display:none"></div> --> <input type="file" id="upload-ipt" onchange="chooseVideo()" accept="video/*" /> <p id="handle-wrap"></p> <div> <h3>原视频</h3> <div id="in-box" style="display:none"></div> </div> <div> <h3>视频截图</h3> <div id="img-wrap"></div> </div> <script> function chooseVideo(){ var oHandle = document.getElementById(‘handle-wrap‘); oHandle.innerHTML = "<button onclick=‘showVideo()‘>显示视频</button>"; console.log(‘选择文件‘); var obj_file = document.getElementById("upload-ipt"); var file = obj_file.files[0]; var blob = new Blob([file]), // 文件转化成二进制文件 url = URL.createObjectURL(blob); //转化成url console.log(blob, url); var oVideo = document.createElement(‘video‘); oVideo.setAttribute(‘src‘, url); oVideo.setAttribute(‘controls‘, ‘controls‘); oVideo.currentTime = 1; // 设置当前视频为 第1s var oInBox = document.getElementById(‘in-box‘); oInBox.appendChild(oVideo); console.dir(oVideo); /* oVideo.addEventListener(‘canplay‘, function (event){ var oCanvas = document.createElement(‘canvas‘); setTimeout( ()=>{ oCanvas.width = oVideo.videoWidth; oCanvas.height = oVideo.videoHeight; oCanvas.getContext("2d").drawImage(oVideo, 0, 0, oCanvas.width, oCanvas.height * 2); console.log(oCanvas.toDataURL("image/png")); //第一帧图片url }, 1000 ) }); */ oVideo.addEventListener(‘canplay‘, function (event){ var oCanvas = document.createElement(‘canvas‘); oCanvas.width = oVideo.videoWidth; oCanvas.height = oVideo.videoHeight; oCanvas.getContext("2d").drawImage(oVideo, 0, 0, oCanvas.width, oCanvas.height); console.log(oCanvas.toDataURL("image/png")); //第一帧图片url var base64 = oCanvas.toDataURL("image/png"); var oImg = document.createElement("img"); var oImgWrap = document.getElementById(‘img-wrap‘); oImg.setAttribute(‘src‘, base64); oImgWrap.appendChild(oImg); }); } function showVideo(){ // var oVideo = document.createElement(‘video‘); // oVideo.setAttribute(‘controls‘, ‘controls‘); var oInBox = document.getElementById(‘in-box‘); oInBox.style.display = ‘block‘; } </script> </body> </html>
github地址：
https://github.com/Kayakyx/video-frame-capture