busyboy not piping file to specified folder in node js (windows) - node.js

Question

I am trying to upload mp4 files using typescript, node js and mongodb but it is not working.
I am using busboy library for the file upload
I am using postman to test my api
when I send the file I receive the file on busboy
I can display the file info like the filename
but the file does not move to the new location
video.controller.ts
const MIME_TYPES = ["video/mp4"];
function getPath({
videoId,
extension,
}: {
videoId: Video["videoId"];
extension: Video["extension"];
}) {
return `${process.cwd()}/videos/${videoId}.${extension}`;
}
export async function uploadVideoHandler(req: Request, res: Response) {
const bb = busboy({ headers: req.headers });
const user = res.locals.user;
const video = await createVideo({ owner: user._id });
console.log(video);
bb.on("file", async (_, file, info) => {
const extension = info.mimeType.split("/")[1];
const filePath = getPath({
videoId: video.videoId,
extension,
});
video.extension = extension;
const { filename } = info;
console.log("filename ", filename);
await video.save();
console.log(filePath);
const stream = fs.createWriteStream(filePath);
file.pipe(stream);
});
bb.on("close", () => {
res.writeHead(StatusCodes.CREATED, {
Connection: "close",
"Content-Type": "application/json",
});
res.write(JSON.stringify(video));
res.end();
});
return req.pipe(bb);
}
Api route
const router = express.Router();
router.post("/", requireUser, uploadVideoHandler);
export default router;