Javascript创建包含图片和歌曲的视频

// 创建画布
var canvas = document.createElement('canvas');
canvas.width = 640;
canvas.height = 480;
document.body.appendChild(canvas);

// 加载图片
var image = new Image();
image.src = '图片的URL';

// 加载歌曲
var audio = new Audio();
audio.src = '歌曲的URL';

// 图片和歌曲加载完成后执行
Promise.all([
  new Promise((resolve) => { image.onload = resolve; }),
  new Promise((resolve) => { audio.oncanplaythrough = resolve; })
]).then(() => {
  // 图片加载完成后绘制到画布上
  var context = canvas.getContext('2d');
  context.drawImage(image, 0, 0);

  // 歌曲加载完成后播放
  var audioContext = new AudioContext();
  var source = audioContext.createBufferSource();
  audioContext.decodeAudioData(audio.response, function(buffer) {
    source.buffer = buffer;
    source.connect(audioContext.destination);
    source.start(0);
  });
});