Use in Google Cloud function

I'm trying to use ffprobe in a Google Cloud Function. But all I get is an empty Promise no matter what my input is:

**Input:**
`https://ucarecdn.com/1ba97d0a-e709-4915-bb35-5ad9e1b42975/test2.mp3`

**Output**
`{"domain":{"domain":null,"_events":{},"_eventsCount":3,"members":[]}}`

What I'm I missing?

```
exports.helloWorld = (req, res) => {
const ffprobe = require('ffprobe'),
ffprobeStatic = require('ffprobe-static');
let message = req.query.message || req.body.message || 'Error';
let result = ffprobe(message, { path: ffprobeStatic.path }) || 'Error ffprobe';
res.status(200).send(result);
};
```