{ "tracker" : { "class_name" : "cnstream::Tracker", "parallelism" : 1, "max_input_queue_size" : 20, "custom_params" : { "model_path" : "../data/models/feature_extract_for_tracker_b4c4_argb_mlu220.cambricon", "max_cosine_distance": "0.06", "track_name": "IoUMatch", "device_id" : 0 } } }