No response of the cam after update to 3.1.1
After update to version v3.1.1 I get no response from the camera. Everything worked before.

Done:
1. homebridge-camera-ffmpeg deinstall & reinstall
2. dozens restart of HB
3. restart of the Cam / iPhone
4. take the cam out of HK and added again 
5. with and without entry "porthttp"
6. with ans without entry "source": "-i http://192.168.87.50/photo"
7. with the entry part from "maxWidth" to "audio" and without
8. as bridged and unbridged

The cam video can be seen with VLC as a network stream.

Log:
[Camera FFmpeg] [Hausfront Cam] Snapshot requested: 1280 x 720
[Camera FFmpeg] [Hausfront Cam] Snapshot command: ffmpeg -i http://192.168.87.50/live -frames:v 1 -f image2 -
[Camera FFmpeg] [Hausfront Cam] An error occurred while making snapshot request: spawn ffmpeg ENOENT
[Camera FFmpeg] [Hausfront Cam] Fetching snapshot took 0.022 seconds.
[Camera FFmpeg] [Hausfront Cam] Sending snapshot: 1280 x 720
[Camera FFmpeg] [Hausfront Cam] Resize command: ffmpeg -i pipe: -frames:v 1 -filter:v transpose=2,scale='min(1280,iw)':'min(720,ih)':force_original_aspect_ratio=decrease,scale=trunc(iw/2)*2:trunc(ih/2)*2 -f image2 -
[Camera FFmpeg] [Hausfront Cam] An error occurred while resizing snapshot: spawn ffmpeg ENOENT
[Hausfront Cam] Snapshot request handler provided empty image buffer!


Config:
{
    "name": "Camera FFmpeg",
    "porthttp": 8882,
    "cameras": [
        {
            "name": "Hausfront Cam",
            "manufacturer": "Apple",
            "model": "iPhone 6s",
            "serialNumber": "iOS 14.4",
            "firmwareRevision": "iOS 14.4",
            "motion": true,
            "doorbell": true,
            "motionTimeout": 5,
            "videoConfig": {
                "source": "-i http://192.168.87.50/live",
                "maxWidth": 3840,
                "maxHeight": 2160,
                "maxFPS": 0,
                "maxBitrate": 25000,
                "forceMax": true,
                "videoFilter": "transpose=2",
                "audio": false,
                "debug": true
            }
        }
    ],
    "platform": "Camera-ffmpeg"
}

