如何将使用multer上传的视频文件转换为字符串，以便在前端显示

npm install multer

const multer = require('multer');

const storage = multer.diskStorage({
  destination: function (req, file, cb) {
    cb(null, 'uploads/'); // 设置上传文件的目标文件夹
  },
  filename: function (req, file, cb) {
    cb(null, file.originalname); // 设置上传文件的文件名
  }
});

const upload = multer({ storage: storage });

app.post('/upload', upload.single('video'), function(req, res) {
  res.send('File uploaded successfully');
});

const fs = require('fs');

app.post('/upload', upload.single('video'), function(req, res) {
  const videoPath = req.file.path;
  const videoData = fs.readFileSync(videoPath, 'base64');
  const videoString = `data:${req.file.mimetype};base64,${videoData}`;
  
  res.send(videoString);
});

<video controls>
  <source src="data:video/mp4;base64,视频字符串" type="video/mp4">
</video>