如何使用 Canvas 导出高清晰度视频，将 Echarts 动态图表转化为视频？

let recordrtc = recordrtc($canvas, {    type: 'canvas'});// 开始录制：recordrtc.startrecording();// 停止录制（单位：毫秒）：recordrtc.stoprecording(function(videourl) {    console.log(videourl);});

var gif = new GIF({    quality: 10,    workerScript: './js/gif.worker.js'});gif.on('finished', function(blob) {    saveAs(blob, "test.gif");});// 一帧一帧录制：function loop() {    requestAnimationFrame(function() {        gif.addFrame($canvas, {delay: 100});        if (Date.now() - start >= time) {            gif.render();        } else {            loop();        }    });}