[Bug]: Doorbell camera can't stream video or receive snapshots regardless of settings
### What happened?

I am using the plugin on a homebridge installation running on my Synology DS920+ (DSM 7.2-64570 Update 3, Linux Synology 4.4.302+ #64570). Everything is working normally (motion detection, HomeBase alarm states, other plugins etc.), homebridge is installed via the SynoCommunity repo as instructed by the homebridge wiki, ffmpeg4/5/6 and kernel headers for compiling are also installed as per the same instructions, and the ffmpeg versions installed are 4.1.9, 5.1.3-2 and 6.0-2. For no lack of effort, my Doorbell camera can't stream, nor receive any snapshots. I recently moved my installation to a standalone homebridge installation (prior to that, I was running homebridge in a DietPi VM on the same NAS, with no issues whatsoever; reason for migration was to reduce overhead). Ever since the move, i have this issue. I have tried all steps in the Common Issues and Streaming wiki pages (reducing quality to Low, trying out different presets, restarting the HomeBase, disabling Talkback and Audio, using Cloud Snapshots), as well as reinstalling the plugin after clearing out the entire installation including settings and devices, reinstalling ffmpeg. Still no luck.

I suspect it has something to do with the ffmpeg installation, but I'm at a loss on how to proceed with debugging. Any ideas? Please let me know what else I can try and report back. Thanks in advance 🙏🏻

### Device Type

Doorbell (Supported)

### Plugin Version

v2.0.x (Supported)

### HomeBridge Version

v1.6.x (Supported)

### NodeJS Version

v18 (Supported)

### Operating System

Other (UnSupported)

### Relevant log output

```shell
[...]
[8/21/2023, 12:35:33 PM] [EufySecurity-2.2.2] INFO:  You're using guest admin account with this plugin! This is recommanded way!
[8/21/2023, 12:35:33 PM] [EufySecurity-2.2.2] INFO:  Updating accessory: Homebase 2
[8/21/2023, 12:35:33 PM] [Dining Room Camera] current power state: on
[8/21/2023, 12:35:34 PM] [EufySecurity-2.2.2] INFO:  Doorbell Setting up automatic snapshot refresh every 10 minutes. This may decrease battery life dramatically. The refresh process for Doorbell should begin in 1 minutes.
[8/21/2023, 12:35:34 PM] [EufySecurity-2.2.2] INFO:  Doorbell is set to handle snapshots with cloud images. Snapshots might be older than they appear.
[8/21/2023, 12:35:34 PM] [EufySecurity-2.2.2] INFO:  Adding new unbridged accessory: Doorbell
[8/21/2023, 12:35:34 PM] Publishing external accessory (name: Doorbell, publishInfo: {
  username: '6F:24:C5:FF:0A:FD',
  pincode: '***-**-***',
  category: 1,
  port: undefined,
  bind: [ [length]: 0 ],
  mdns: undefined,
  addIdentifyingMaterial: true,
  advertiser: 'ciao'
}).
[8/21/2023, 12:35:34 PM] Doorbell 12A8 is running on port 38190.
[8/21/2023, 12:35:34 PM] Please add [Doorbell 12A8] manually in Home app. Setup Code: 221-03-331
[8/21/2023, 12:35:34 PM] [EufySecurity-2.2.2] WARN:  Doorbell Couldt not get cloud snapshot: Error: unable to verify the first certificate
[8/21/2023, 12:35:34 PM] [EufySecurity-2.2.2] WARN:  Doorbell snapshot handler is initialized without cloud snapshot. Maybe no snapshot will displayed the first times.
[...]
[8/21/2023, 12:35:40 PM] [EufySecurity-2.2.2] ERROR: Doorbell No snapshot in memory
[Doorbell 12A8] Snapshot request handler provided empty image buffer!
[...]
[8/21/2023, 12:35:48 PM] [homebridge-eufy-security] Error: 
    at Accessory.sendCharacteristicWarning (/volume1/homebridge/node_modules/homebridge/node_modules/hap-nodejs/src/lib/Accessory.ts:2031:14)
    at Timeout._onTimeout (/volume1/homebridge/node_modules/homebridge/node_modules/hap-nodejs/src/lib/Accessory.ts:1732:14)
    at listOnTimeout (node:internal/timers:569:17)
    at processTimers (node:internal/timers:512:7)
[...]
[8/21/2023, 12:35:54 PM] [homebridge-eufy-security] This plugin slows down Homebridge. The write handler for the characteristic 'Selected RTP Stream Configuration' on the accessory 'Doorbell 12A8' didn't respond at all!. Please check that you properly call the callback! See https://homebridge.io/w/JtMGR for more info.
[8/21/2023, 12:35:54 PM] [homebridge-eufy-security] Error: 
    at Accessory.sendCharacteristicWarning (/volume1/homebridge/node_modules/homebridge/node_modules/hap-nodejs/src/lib/Accessory.ts:2031:14)
    at Timeout._onTimeout (/volume1/homebridge/node_modules/homebridge/node_modules/hap-nodejs/src/lib/Accessory.ts:1747:16)
    at listOnTimeout (node:internal/timers:569:17)
    at processTimers (node:internal/timers:512:7)
[8/21/2023, 12:35:55 PM] [EufySecurity-2.2.2] ERROR: Doorbell Local livestream didn't start in time. Abort livestream request.
[8/21/2023, 12:35:55 PM] [EufySecurity-2.2.2] ERROR: Doorbell Unable to start the livestream: no started livestream found
[8/21/2023, 12:35:56 PM] [EufySecurity-2.2.2] ERROR: Doorbell No snapshot in memory
[Doorbell 12A8] Snapshot request handler provided empty image buffer!
[...]
[8/21/2023, 12:36:17 PM] [EufySecurity-2.2.2] INFO:  Looking for old cached accessories that seem to be outdated...
[8/21/2023, 12:36:17 PM] [EufySecurity-2.2.2] INFO:  No outdated cached accessories found.
[...]
[8/21/2023, 12:36:44 PM] [EufySecurity-2.2.2] ERROR: Doorbell Local livestream didn't start in time. Abort livestream request.
[8/21/2023, 12:36:44 PM] [EufySecurity-2.2.2] WARN:  Doorbell Could not get snapshot from livestream!
[8/21/2023, 12:36:44 PM] [EufySecurity-2.2.2] WARN:  Doorbell No camera source detected.
[...]
```


### config

```shell
[...]
        {
            "platform": "EufySecurity",
            "username": "xxx@xxx.xxx",
            "password": "xxx",
            "country": "GR",
            "deviceName": "",
            "ignoreDevices": [
                "XXX",
                "XXX"
            ],
            "cameras": [
                {
                    "serialNumber": "XXX",
                    "rtsp": false,
                    "enableCamera": true,
                    "videoConfig": {
                        "audio": false,
                        "debug": true,
                        "vcodec": "copy",
                        "useSeparateProcesses": true
                    },
                    "talkback": false,
                    "enableButton": false,
                    "motionButton": false,
                    "unbridge": true,
                    "refreshSnapshotIntervalMinutes": 10,
                    "useCachedLocalLivestream": true
                }
            ],
            "ignoreStations": [],
            "cleanCache": true
}
[...]
```
