Page({
  data: {},
  onLoad() {
    const cameraContext = wx.createCameraContext();
    const fs = wx.getFileSystemManager();
    const listener = cameraContext.onCameraFrame((frame) => {
      console.log(frame.data instanceof ArrayBuffer, frame.width, frame.height);
      const filePath = `${wx.env.USER_DATA_PATH}/hello.jpg`;
      fs.writeFile({
        filePath,
        encoding: "binary",
        data: frame.data,
        success: (res) => {
          wx.saveImageToPhotosAlbum({
            filePath,
          });
        },
      });
    });
    listener.start();
    setTimeout(() => listener.stop(), 2000);
  },
});

保存后的图片显示已损坏且无法打开。

复现步骤:

1. 真机调试 -> 二维码真机调试/自动真机调试
2. 运行小程序2秒后查看真机相册