实时编码，根据眼球追踪返回的坐标值，保持焦点区域的图像质量，降低其他区域的质量来实现保持用户视觉体验的同时降低每帧大小，提高网络传输的吞吐量-Real-time encoding, according to the coordinates of the eye to track return, keep the focus area of ​ ​ the image quality and reduce the quality of other regions to achi