`FFmpeg exited with code: 1 and signal: null (Error)` upon opening stream after converting to Unbridged config
**Describe The Problem:**
I recently converted my cameras to unbridged. The config as-written was working while bridged - albeit slow - but now fails with FFmpeg error 1. I've confirmed I can open the rtsp streams in VLC as written. 

Snapshots seem to work fine. 

I'm running Hombridge in a Docker container on rPi4 and have been for several years. 

**To Reproduce:**
Convert Amcrest camera from bridged to unbridged with this config. 

**Logs:**
```
[3/1/2023, 10:40:38 AM] Loaded 0 cached accessories from cachedAccessories.0E94D166B993.
[3/1/2023, 10:40:38 AM] Homebridge v1.4.0 (HAP v0.10.0) (Garage) is running on port 41737.
[3/1/2023, 10:40:39 AM] [Garage] Getting current state asynchronously...
[3/1/2023, 10:40:39 AM] [Garage] Status vehicle: not present
[3/1/2023, 10:40:40 AM] [Garage] Status garage: closed
[3/1/2023, 10:40:53 AM] [Camera FFmpeg] [Front Porch] Starting video stream: native x native, native fps, 299 kbps (AAC-eld)
[3/1/2023, 10:40:54 AM] [Camera FFmpeg] [Front Porch] Stopped video stream.
[3/1/2023, 10:40:56 AM] [Camera FFmpeg] [Front Porch] FFmpeg exited with code: 1 and signal: null (Error)
[3/1/2023, 10:40:56 AM] [Camera FFmpeg] [Front Porch] Stopped video stream.
[3/1/2023, 10:40:56 AM] [Camera FFmpeg] [Front Porch] Starting video stream: native x native, native fps, 299 kbps (AAC-eld)
[3/1/2023, 10:40:59 AM] [Camera FFmpeg] [Front Porch] FFmpeg exited with code: 1 and signal: null (Error)
[3/1/2023, 10:40:59 AM] [Camera FFmpeg] [Front Porch] Stopped video stream.
[3/1/2023, 10:41:01 AM] [Camera FFmpeg] [Garage Door] Starting video stream: native x native, native fps, 299 kbps (AAC-eld)
[3/1/2023, 10:41:01 AM] [Camera FFmpeg] [Garage Door] FFmpeg exited with code: 1 and signal: null (Error)
[3/1/2023, 10:41:01 AM] [Camera FFmpeg] [Garage Door] Stopped video stream.
[3/1/2023, 10:41:03 AM] [Camera FFmpeg] [Front Porch] Starting video stream: native x native, native fps, 299 kbps (AAC-eld)
[3/1/2023, 10:41:06 AM] [Camera FFmpeg] [Front Porch] FFmpeg exited with code: 1 and signal: null (Error)
[3/1/2023, 10:41:06 AM] [Camera FFmpeg] [Front Porch] Stopped video stream.
[3/1/2023, 10:41:09 AM] [Camera FFmpeg] [Front Porch] Starting video stream: native x native, native fps, 299 kbps (AAC-eld)
[3/1/2023, 10:41:10 AM] [Camera FFmpeg] [Front Porch] Stopped video stream.
[3/1/2023, 10:41:12 AM] [Camera FFmpeg] [Front Porch] FFmpeg exited with code: 1 and signal: null (Error)
[3/1/2023, 10:41:12 AM] [Camera FFmpeg] [Front Porch] Stopped video stream.
[3/1/2023, 10:42:04 AM] [Camera FFmpeg] [Backyard] Starting video stream: native x native, native fps, 299 kbps
```


**Homebridge Config:**
```
    "platforms": [
        {
            "name": "Camera FFmpeg",
            "cameras": [
                {
                    "name": "Front Porch",
                    "unbridge": true,
                    "videoConfig": {
                        "source": "-i rtsp://stream:9JaTgtednxpPZgt@10.0.1.163:554/cam/realmonitor?channel=1&subtype=0",
                        "stillImageSource": "-i http://stream:9JaTgtednxpPZgt@10.0.1.163/cgi-bin/snapshot.cgi?1",
                        "maxWidth": 0,
                        "maxHeight": 0,
                        "maxFPS": 0,
                        "audio": true,
                        "debug": false
                    }
                },
                {
                    "name": "Garage Door",
                    "unbridge": true,
                    "videoConfig": {
                        "source": "-i rtsp://stream:9JaTgtednxpPZgt@10.0.1.164:554/cam/realmonitor?channel=1&subtype=0",
                        "stillImageSource": "-i http://stream:9JaTgtednxpPZgt@10.0.1.164/cgi-bin/snapshot.cgi?1",
                        "maxWidth": 0,
                        "maxHeight": 0,
                        "maxFPS": 0,
                        "audio": true
                    }
                },
                {
                    "name": "Backyard",
                    "unbridge": true,
                    "videoConfig": {
                        "source": "-i rtsp://stream:9JaTgtednxpPZgt@10.0.1.157:554/cam/realmonitor?channel=1&subtype=0",
                        "stillImageSource": "-i http://stream:9JaTgtednxpPZgt@10.0.1.157/cgi-bin/snapshot.cgi?1",
                        "maxWidth": 0,
                        "maxHeight": 0,
                        "maxFPS": 0,
                        "audio": false
                    }
                }
            ],
            "_bridge": {
                "username": "[[redacted]]",
                "port": 40525
            },
            "platform": "Camera-ffmpeg"
        },
```

**Screenshots:**
![Screen Shot 2023-03-01 at 10 48 26 AM](https://user-images.githubusercontent.com/2472689/222236064-ff0f0fc1-00d8-4ef8-834e-d36930b81925.png)

![Screen Shot 2023-03-01 at 10 48 30 AM](https://user-images.githubusercontent.com/2472689/222236109-dfe24fb8-62ce-4313-be7d-1533cf7f26c6.png)
Spinning et eternal ;-)

**Environment:**

* **Node.js Version**: 16.13.2
* **NPM Version**: 8.1.2
* **Homebridge Version**: 1.4.0
* **Homebridge Camera FFmpeg Version**: 3.1.4
* **Homebridge Config UI X Plugin Version**: 4.50.1
* **Operating System**: Raspbian / Docker (Alpine, via Linuxserver.io) 


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