Camera stops stream after about 3 minutes.
**Describe The Problem:**
When watching live feed from the cameras, they will work fine for a few minutes, but then will suddenly stop streaming and just show "no response" message. This happens when watching it as PIP or with the whole app open.

**To Reproduce:**
Simply wait for a few minutes and the stream will freeze



```
[05/03/2021, 11:11:23] [Camera FFmpeg] [Câmera da Sala 3] Starting video stream: native x native, native fps, ??? kbps (AAC-eld)
[05/03/2021, 11:14:47] [Camera FFmpeg] [Câmera da Sala 3] Stopped video stream.
```

**Homebridge Config:**

 {
            "name": "Camera FFmpeg",
            "cameras": [
                {
                    "name": "Câmera da Lara",
                    "unbridge": true,
                    "videoConfig": {
                        "source": "-i rtsp://...",
                        "maxStreams": 3,
                        "vcodec": "copy",
                        "audio": true
                    }
                },
                {
                    "name": "Câmera da Sala 3",
                    "unbridge": true,
                    "videoConfig": {
                        "source": "-i rtsp:/...",
                        "maxStreams": 4,
                        "vcodec": "copy",
                        "audio": true
                    }
                }
            ],
            "platform": "Camera-ffmpeg"
        },



**Environment:**

* **Node.js Version**: 14.16.0
* **NPM Version**: 6.14.11
* **Homebridge Version**: 1.3.2
* **Homebridge Camera FFmpeg Version**: 3.1.1
* **Homebridge Config UI X Plugin Version**: 4.39.1
* **Operating System**: Raspabian



