Add more than one camera to config
<!-- You must use the issue template below -->

**Describe The Problem:**
Since updating to newest plug in, my previous configuration of 7 working cameras will not run.   I've removed the plug in, deleted all reference to it in config, re-added the plug in and can get 1 camera working again.  I then tried to re-add the other six cameras via copy and paste from old back up but it will not work.

This is running on a dedicated Raspberry PI, nothing else running on it.

Basically I just need to know how to properly add in more than one camera

**To Reproduce:**
Any time another camera added, it crashes

**Logs:**
<!-- Bug reports that do not contain logs may be closed without warning. -->

```
Show the Homebridge logs here.
Remove any sensitive information.
```

**Homebridge Config:**

ONE CAMERA WORKING
{
    "server": {
        "port": 8080,
        "origin": "*",
        "autostart": 0,
        "home_setup_id": "X-HM://0023ISYWYIL6H",
        "polling_seconds": 5
    },
    "client": {
        "default_route": "status",
        "inactive_logoff": 30,
        "theme": "throwback-blue",
        "locale": "en",
        "temp_units": "celsius",
        "country_code": "CA",
        "postal_code": "XXXX",
        "latitude": "XXXX",
        "longitude": "XXXX"
    },
    "bridge": {
        "name": "HOOBS",
        "port": 51826,
        "pin": "031-45-154",
        "username": "61:B2:43:66:87:B0"
    },
    "description": "HOOBS for homekit",
    "ports": {},
    "plugins": [
        "homebridge-nest",
        "homebridge-smartthings-v2",
        "homebridge-camera-ffmpeg"
    ],
    "accessories": [],
    "platforms": [
        {
            "platform": "SmartThings-v2",
            "plugin_map": {
                "plugin_name": "homebridge-smartthings-v2"
            },
            "name": "SmartThings-v2",
            "direct_port": 8000,
            "temperature_unit": "C",
            "validateTokenId": false,
            "disableErrorReporting": false,
            "logConfig": {
                "debug": false,
                "showChanges": true,
                "hideTimestamp": true,
                "hideNamePrefix": true,
                "file": {
                    "enabled": true,
                    "level": "Good"
                }
            },
            "app_url": "XXXX",
            "app_id": "XXXXX",
            "access_token": "XXXXX"
        },
        {
            "platform": "Nest",
            "plugin_map": {
                "plugin_name": "homebridge-nest"
            },
            "name": "Nest",
            "googleAuth": {
                "cookies": "XXXXX",
                "issueToken": "XXXXX",
                "apiKey": "XXXX"
            }
        },
        {
            "platform": "Camera-ffmpeg",
            "plugin_map": {
                "plugin_name": "homebridge-camera-ffmpeg"
            },
            "name": "Camera FFmpeg",
            "cameras": [
                {
                    "name": "Camera Driveway",
                    "manufacturer": "Reolink",
                    "model": "RLC-410W",
                    "videoConfig": {
                        "source": "-rtsp_transport tcp -re -i rtsp://xxxxxx@192.168.1.241:554/h264Preview_01_main",
                        "stillImageSource": "-i http://192.168.1.241/cgi-bin/api.cgi?cmd=Snap&channel=0&rs=wuuPhkmUCeI9WG7C&user=admin&password=xxxxx",
                        "maxStreams": 2,
                        "maxWidth": 1280,
                        "maxHeight": 720,
                        "maxFPS": 15,
                        "maxBitrate": 300,
                        "vcodec": "h264_omx -preset ultrafast",
                        "packetSize": 1316,
                        "audio": false,
                        "debug": true
                    }
                }
            ]
        }
    ],
    "package_manager": "npm",
    "system": "hoobs"
}

USED TO WORK
{
    "server": {
        "port": 8080,
        "origin": "*",
        "autostart": 0,
        "home_setup_id": "X-HM://0023ISYWYIL6H",
        "polling_seconds": 5
    },
    "client": {
        "default_route": "status",
        "inactive_logoff": 30,
        "theme": "throwback-blue",
        "locale": "en",
        "temp_units": "celsius",
        "country_code": "CA",
        "postal_code": "",
        "latitude": "",
        "longitude": ""
    },
    "bridge": {
        "name": "HOOBS",
        "port": 51826,
        "pin": "031-45-154",
        "username": "61:B2:43:66:87:B0"
    },
    "description": "HOOBS for homekit",
    "ports": {},
    "plugins": [
        "homebridge-camera-ffmpeg",
        "homebridge-nest",
        "homebridge-smartthings-v2"
    ],
    "accessories": [],
    "platforms": [
        {
            "platform": "Camera-ffmpeg",
            "cameras": [
                {
                    "name": "Camera Front Door",
                    "manufacturer": "Reolink",
                    "model": "RLC-410W",
                    "videoConfig": {
                        "source": "-rtsp_transport tcp -re -i rtsp://xxxxx@192.168.1.240:554/h264Preview_01_main",
                        "stillImageSource": "-i http://192.168.1.240/cgi-bin/api.cgi?cmd=Snap&channel=0&rs=wuuPhkmUCeI9WG7C&user=admin&password=xxxxx",
                        "maxStreams": 2,
                        "maxWidth": 1280,
                        "maxHeight": 720,
                        "maxFPS": 15,
                        "maxBitrate": 300,
                        "vcodec": "libx264 -preset ultrafast",
                        "packetSize": 1316,
                        "audio": false,
                        "debug": true
                    }
                }
            ]
        },
        {
            "platform": "Camera-ffmpeg",
            "cameras": [
                {
                    "name": "Camera Driveway",
                    "manufacturer": "Reolink",
                    "model": "RLC-410W",
                    "videoConfig": {
                        "source": "-rtsp_transport tcp -re -i rtsp://xxxxx@192.168.1.241:554/h264Preview_01_main",
                        "stillImageSource": "-i http://192.168.1.241/cgi-bin/api.cgi?cmd=Snap&channel=0&rs=wuuPhkmUCeI9WG7C&user=admin&password=xxxxx",
                        "maxStreams": 2,
                        "maxWidth": 1280,
                        "maxHeight": 720,
                        "maxFPS": 15,
                        "maxBitrate": 300,
                        "vcodec": "h264_omx -preset ultrafast",
                        "packetSize": 1316,
                        "audio": false,
                        "debug": true
                    }
                }
            ]
        },
        {
            "platform": "Camera-ffmpeg",
            "cameras": [
                {
                    "name": "Camera Patio",
                    "manufacturer": "Reolink",
                    "model": "RLC-410W",
                    "videoConfig": {
                        "source": "-rtsp_transport tcp -re -i rtsp://xxxxx@192.168.1.243:554/h264Preview_01_main",
                        "stillImageSource": "-i http://192.168.1.243/cgi-bin/api.cgi?cmd=Snap&channel=0&rs=wuuPhkmUCeI9WG7C&user=admin&password=xxxxx",
                        "maxStreams": 2,
                        "maxWidth": 1280,
                        "maxHeight": 720,
                        "maxFPS": 15,
                        "maxBitrate": 300,
                        "vcodec": "h264_omx -preset ultrafast",
                        "packetSize": 1316,
                        "audio": false,
                        "debug": true
                    }
                }
            ]
        },
        {
            "platform": "Camera-ffmpeg",
            "cameras": [
                {
                    "name": "Camera Living Room",
                    "manufacturer": "Amcrest",
                    "model": "IP3M-HX2W",
                    "videoConfig": {
                        "source": "-rtsp_transport tcp -re -i rtsp://xxxxx@192.168.1.221/cam/realmonitor?channel=1&subtype=00&authbasic=YWRtaW46bG9sYTk2OTg=",
                        "stillImageSource": "-i http://xxxxx@192.168.1.221/cgi-bin/snapshot.cgi?1",
                        "maxStreams": 2,
                        "maxWidth": 1280,
                        "maxHeight": 720,
                        "maxFPS": 15,
                        "maxBitrate": 300,
                        "vcodec": "copy",
                        "packetSize": 1316,
                        "audio": false,
                        "debug": true
                    }
                }
            ]
        },
        {
            "platform": "Camera-ffmpeg",
            "cameras": [
                {
                    "name": "Camera Garage",
                    "manufacturer": "Amcrest",
                    "model": "IP3M-HX2W",
                    "videoConfig": {
                        "source": "-rtsp_transport tcp -re -i rtsp://xxxx@192.168.1.222/cam/realmonitor?channel=1&subtype=00&authbasic=YWRtaW46bG9sYTk2OTg=",
                        "stillImageSource": "-i http://xxxxx@192.168.1.222/cgi-bin/snapshot.cgi?1",
                        "maxStreams": 2,
                        "maxWidth": 1280,
                        "maxHeight": 720,
                        "maxFPS": 15,
                        "maxBitrate": 300,
                        "vcodec": "copy",
                        "packetSize": 1316,
                        "audio": false,
                        "debug": true
                    }
                }
            ]
        },
        {
            "platform": "Camera-ffmpeg",
            "cameras": [
                {
                    "name": "Camera Kitchen",
                    "manufacturer": "Amcrest",
                    "model": "IP3M-HX2W",
                    "videoConfig": {
                        "source": "-rtsp_transport tcp -re -i rtsp://xxxxx@192.168.1.220/cam/realmonitor?channel=1&subtype=00&authbasic=YWRtaW46bG9sYTk2OTg=",
                        "stillImageSource": "-i http://xxxxx@192.168.1.220/cgi-bin/snapshot.cgi?1",
                        "maxStreams": 2,
                        "maxWidth": 1280,
                        "maxHeight": 720,
                        "maxFPS": 15,
                        "maxBitrate": 300,
                        "vcodec": "copy",
                        "packetSize": 1316,
                        "audio": false,
                        "debug": true
                    }
                }
            ]
        },
        {
            "platform": "Camera-ffmpeg",
            "cameras": [
                {
                    "name": "Camera Basement",
                    "manufacturer": "Amcrest",
                    "model": "IP3M-HX2W",
                    "videoConfig": {
                        "source": "-rtsp_transport tcp -re -i rtsp://xxxx@192.168.1.235/cam/realmonitor?channel=1&subtype=00&authbasic=YWRtaW46bG9sYTk2OTg=",
                        "stillImageSource": "-i http://xxxxx@192.168.1.235/cgi-bin/snapshot.cgi?1",
                        "maxStreams": 2,
                        "maxWidth": 1280,
                        "maxHeight": 720,
                        "maxFPS": 15,
                        "maxBitrate": 300,
                        "vcodec": "copy",
                        "packetSize": 1316,
                        "audio": false,
                        "debug": true
                    }
                }
            ]
        },
        {
            "platform": "SmartThings-v2",
            "plugin_map": {
                "plugin_name": "homebridge-smartthings-v2"
            },
            "name": "SmartThings-v2",
            "direct_port": 8000,
            "temperature_unit": "C",
            "validateTokenId": false,
            "disableErrorReporting": false,
            "logConfig": {
                "debug": false,
                "showChanges": true,
                "hideTimestamp": true,
                "hideNamePrefix": true,
                "file": {
                    "enabled": true,
                    "level": "Good"
                }
            },
            "app_url": "xxxxx",
            "app_id": "xxxxx",
            "access_token": "xxxxx"
        },
        {
            "platform": "Nest",
            "plugin_map": {
                "plugin_name": "homebridge-nest"
            },
            "name": "Nest",
            "googleAuth": {
                "cookies": "xxxxx",
                "issueToken": "xxxxx",
                "apiKey": "xxxx"
            }
        }
    ],
    "package_manager": "npm",
    "system": "hoobs"
}

```

**Screenshots:**
<!-- If applicable, add screenshots to help explain your problem. -->

**Environment:**

* **Node.js Version**: <!-- node -v -->  12.16.2
* **NPM Version**: <!-- npm -v -->  
* **Homebridge Version**: <!-- homebridge -V -->  HOOBS 3.2.6
* **Homebridge Camera FFmpeg Version**:  3.0.3
* **Homebridge Config UI X Plugin Version**:
* **Operating System**: Raspbian


<!-- Click the "Preview" tab before you submit to ensure the formatting is correct. -->
