{
  "tracker" : {
    "class_name" : "cnstream::Tracker",
    "parallelism" : 1,
    "max_input_queue_size" : 20,
    "custom_params" : {
      "model_path" : "../../../data/models/feature_extract_for_tracker_b4c4_argb_mlu270.cambricon",
      "max_cosine_distance": "0.06",
      "device_id" : 0
    }
  }
}