{
    "FFmpegRtspServer": {
        "UseHistoryVideo": false,
        "ARRtspPort": 8554,
        "DrawBufferCount-comment": "等待绘制帧的缓存帧数",
        "DrawBufferCount": 25,
        "EncodeBufferCount-comment": "等待编码的缓存帧数",
        "EncodeBufferCount": 25,
        "SendBufferCount-comment": "等待发送的缓存帧数",
        "SendBufferCount": 25,
        "EncoderH264CRF-comment": "设置编码h264时的crf参数，值越大，码率越小，合适值为18~28，有效值为0~51",
        "EncoderH264CRF": "28"
    },
    "all_ar-comment": "为所有相机加上 AR",
    "all_ar": false,
    "all_hls-comment": "为所有相机加上 AR",
    "all_hls": false,
    "ItemList-comment": "为个别相机做属性定制",
    "ItemList": [
        {
            "describe": "eg.",
            "enable": true,
            "need_change_camera-comment": "是否需要切换相机， 允许切换相机，则 session 可为空， 必须写上 output_path 值",
            "need_change_camera": false,
            "session": "391",
            "cam_id-comment": "为空时，使用　session",
            "cam_id": "391",
            "virtual_camera": false,
            "stay_play": true,
            
            "checkpoint_id-comment": "初始化卡口id, 针对航标巡逻添加，不大于０，则会根据cam_id获取对应的卡口id",
            "checkpoint_id": -1,
            "enable_no_frame-comment": "在没有视频帧输入时，是否出流",
            "enable_no_frame": true,
            "input_path-comment": "输入路径, 为空使用 session 实时流",
            "input_path": "",
            "output_type-comment": "输出类型 rtspserver, rtmppushstream",
            "output_type": "rtspserver",
            "output_path-comment": "输出地址， 为空时使用 ${session} 为输出地址， 不允许 session 与 output_path 同时为空",
            "output_path-comment1": "rtmp://localhost:1935/hls/track1",
            "output_path-comment2": "输出 rtsp 类型只需要写子路径, eg: track1",
            "output_path": "391",
            "enable_filter": true,
            "filter_name": "",
            "ffmpeg": {
                "encoder_thread_count": 0,
                "encoder_framerate": 0,
                "enable_gpu": true
            },
            "analyzer": {
                "target_score-comment": "小于此值的目标才显示",
                "target_score": 0.0,
                "track_count_min-comment": "小于此值的目标不显示",
                "track_count_min": 5,
                "track_interval-comment": "跟踪间隔在于此值，则不绘制此目标，视发送的图片检测间隔调整，单位毫秒",
                "track_interval": 1500,
                "shiplabel_checkscore-comment": "船牌检测分数",
                "shiplabel_checkscore": 0.6,
                "shiplabel_score-comment": "船牌识别分数",
                "shiplabel_score": 0.0,
                "shiplabel_charcount-comment": "船牌字符个数",
                "shiplabel_charcount": 2
            }
        }
    ]
}