static get pluginName () {
    return 'dynamicBg'
  }
@typedef { {
  disable?: boolean,
  mode?: "realtime" | "firstframe" | "framerate",
  frameRate?: number
  filter?: string,
  addMask?: boolean,
  maskBg?: string,
   multiple? : number,
  [propName: string]: any
} } IDynamicBgConfig