no video-stream after moving to new server
**Describe Your Problem:**
I used homebridge and the plugin on a RaspberryPi 2 for a couple of months without problems (snapshots and stream ok). Now I moved my installation to new hardware with a fresh, out-of-the-box Ubuntu 20.04 LTS. All updates have been done. Homebridge was installed according to Readme on Git. I downloaded a backup from the old Raspi with Homebridge Config UI X and uploaded it to the new machine. All went smooth and all plugins restored correctly but there is no video stream - only snapshots.
Looking into the Camera in the Home-App on iPhone does not produce any activity in Homebridge. The Home-App says that camera is not responding.

**Logs:**
In debug-mode there only appeared this:
[5/21/2020, 5:22:51 PM] [Camera-ffmpeg] Initializing Camera-ffmpeg platform...
[5/21/2020, 5:22:51 PM] Front is running on port 35553.
[5/21/2020, 5:22:51 PM] Please add [Front] manually in Home app. Setup Code: XXX-XX-XXX

```
Show the Homebridge logs here.
an example: 
[5/22/2020, 8:22:43 AM] [Camera-ffmpeg] Snapshot from Front at 480:270

**Homebridge Config:**
The part regarding the camera:
{
            "cameras": [
                {
                    "name": "Front",
                    "manufacturer": "INSTAR",
                    "model": "IN-9008",
                    "firmwareRevision": "4.1.2.47",
                    "videoConfig": {
                        "source": "-re -i rtsp://192.168.11.81:554/13",
                        "stillImageSource": "-i http://XXXX:XXXX@192.168.11.81/tmpfs/snap.jpg",
                        "vcodec": "h264_omx",
                        "packetSize": 188
                    }
                }
            ],
            "platform": "Camera-ffmpeg"
        }

**Environment:**

* **Node.js Version**: v12.16.3
* **NPM Version**: 6.14.4
* **Homebridge Version**: 1.1.0
* **Homebridge Camera FFmpeg Version**: 1.1.1
* **Homebridge Config UI X Plugin Version**: 4.20.0
* **Operating System**: Ubuntu 20.04 LTS
