本程序使用v4l2驱动接口获取摄像头的参数，并且可以通过程序对摄像头原始参数进行修改-This program uses the v4l2 driver interface to obtain the parameters of the camera, and the camera can be programmed to modify the original parameter

Parameter keys to communicate between camera application and driver.

摄像头监控完整通信协议，包括云台控制，设备参数调整等。(Camera monitoring complete communication protocol, including PTZ control, equipment parameter adjustment, etc..)