说明：  1. 读入一张 filename = *.jpg 的图片，可以是720P或1280P % 2. 图片的 RGB 转为YUV格式，输出到 *.txt 和 *_444.yuv文件 % 3. 将YUV4:4:4 转为 YUYV4:2:2 packed，输出数据到 *_422yuyv.yuv % 4. 将YUV4:4:4 转为 4:2:0 planar，输出数据到 *_420yv12.yuv % 文件将被输出到创建的 .\*out\ 目录下
(1. Read in a picture with file name = *. JPG, which can be 720p or 1280P %2. Convert RGB image to YUV format, output to *. Txt and*_ 444.yuv file %3. Convert yuv4:4:4 to yuyv4:2:2 packed and output data to*_ four hundred and twenty-two yuyv.yuv %4. Convert yuv4:4:4 to 4:2:0 planar and output data to*_ 420yv12.yuv %The file will be output to the created. \ * out \ \ directory)