Dauha IPC-B2B40-ZS 
Dauha IPC-B2B40-ZS 
```
{
            "name": "Camera FFmpeg",
            "cameras": [
                {
                    "name": "ABCD",
                    "manufacturer": "Dahua",
                    "model": "IPC-B2B40-ZS",
                    "serialNumber": "4K01.........",
                    "firmwareRevision": "2.622.0000000.5.R",
                    "unbridge": false,
                    "videoConfig": {
                        "source": "-i rtsp://user:password@ip:554/cam/realmonitor?channel=1&subtype=0",
                        "stillImageSource": "-i http://user:password@ip/onvifsnapshot/media_service/snapshot?channel=1&subtype=1",
                        "vcodec": "copy"
                    }
                }
            ],
            "platform": "Camera-ffmpeg"
        }

**Additional Information:**
ensure :
1/ H.264 stream in Camera config - no need to reencode on homebridge. vcodec=copy
2/ ONVIF "Enabled" in Camera config -> network settings
3/ Don't use /cgi-bin/snapshot.cgi  for still image it was unstable in my case. Use /onvifsnapshot/media_service/snapshot

