To resolve playback issues I had to use the OMX fork to get the PI 2 and FFMPEG to work more or less reliably. https://github.com/legotheboss/homebridge-camera-ffmpeg-omx

Camera Settings

Video Resolution: 1920x1080
Photo Resolution: 2048x1152

config.json

{
	"platform": "Camera-ffmpeg",
	"cameras": [{
		"name": "Front Porch Camera",
		"videoConfig": {
			"source": "-f mjpeg -i http://alice:8080/video",
			"stillImageSource": "-i http://alice:8080/shot.jpg",
			"maxStreams": 2,
			"maxWidth": 1920,
			"maxHeight": 1080,
			"maxFPS": 30
		}
	}]
}