Ffmpeg v 2.0.0, The copy codec doesn't work correctly
It looks like the copy codec doesn't copy the camera parameters. In the camera settings, the bitrate is set to 2048 and the homebridge log shows 299 kbit / sec. 

"name": "HikCam",
                    "manufacturer": "Hikvision",
                    "model": "HiWatch i114",
                    "serialNumber": "192.168.0.15",
                    "firmwareRevision": "1.0",
                    "videoConfig": {
                        "source": "-y -i 
![FD94F3DF-B0BB-4EBD-98AC-D3FA741968B2](https://user-images.githubusercontent.com/64399012/85177685-065fc680-b296-11ea-9879-b83473526e83.jpeg)
![592A49A5-3759-457F-8EE4-CF76445D2053](https://user-images.githubusercontent.com/64399012/85177701-0bbd1100-b296-11ea-8a6e-89d9410ffeab.png)

rtsp://admin:*******@192.168.0.15:554/unicast",
                        "stillImageSource": "-y -i rtsp://admin:*******@192.168.0.15:554/unicast",
                        "maxFPS": 25,
                        "audio": true,
                        "debug": true