gsd_cn/source/CNStream/configs/recorder.json

{
    "recorder":{
        "class_name": "cnstream::Recorder",
        "parallelism" : 1,
        "max_input_queue_size" : 20,
        "show_perf_info" : true,
        "custom_params" : {
          "dst_width": 960,
          "dst_height": 540,
          "frame_rate" : 20,
          "videoMaxTime":120,
          "cacheTime": 3,
          "enc_type" : ".mp4",
          "outputDir":"/home/GSD/video/"
        }
    }
}