No ffmpeg signal
**Manufacturer/Model:**
Weewooday/IR-Cut Webcam

**Homebridge Config:**

```json
{
            "platform": "Camera-ffmpeg",
       
            "cameras": [
                {
                    "name": "Telecamera Sala",
                    "uploader": false,
                    "videoConfig": {
                        "source": "-re -f video4linux2 -i /dev/video0",
                        "stillImageSource": "-re -f video4linux2 -ss 0.9 -i /dev/video0 -vframes 1",
                        "vcodec": "h264",
                        "audio": false,
                        "debug": false
                    }
                }
            ]
        }
```


This is the log errors when I try to open live stream, however if i do `ffmepg -re -f video4linux2 -i /dev/video0 test.mp4` I can see video.


![image](https://user-images.githubusercontent.com/41821623/153954027-1b863929-e628-4aba-8157-24562cfff424.jpeg)
