{
    "param": {
        "type": "bgMatting",
        "renderCacheKey": "BCCustomBackground",
        "bgPath": "image/bg.jpeg",
        "maskPreProcessBlurType": "BoxFilter",
        "maskPreProcessScaleType": "LibYUV",
        "maskPreProcessLutScale": 3,
        "intensity": 1.0
    },
    "version":"1.1"
}