BMP转YUV，支持多种格式转换。输出为数组。-RGB to YUV, supports a variety of formats.

在linux环境下，打开摄像头采集yuyv格式图片，然后转为rgb格式，最后将图片保存为bmp格式输出-In the linux environment, open the camera image acquisition yuyv format, then converted to rgb format, and save the image as bmp format output