Replace boot logo method

Make a JPG picture with a resolution of 720*576 and a size of 0 ~ 64KB.

You need to create the boot logo under the Linux operating system. The commands are as follows:

ffmpeg -i log720x576.jpg -s 720x576 -pix_fmt nv12 ./log720x576.yuv

./lzma e ./log720x576.yuv log720x576.yuv.lzma

Change the log720x576.yuv.lzma file name to logopic_ V21092301.yuv

2、Upgrade method: put it into the root directory of the disk and automatically upgrade after startup.

使用电脑自带画图工具，制作一个720*576分辨率的文件大小在0~64KB的jpg图片。

需要在linux操作系统下制作开机logo，命令如下：

ffmpeg -i log720x576.jpg -s 720x576 -pix_fmt nv12 ./log720x576.yuv

./lzma e ./log720x576.yuv log720x576.yuv.lzma

将做出的log720x576.yuv.lzma文件名修改成logopic_V21092301.yuv

如下图：

2、升级方式：放入磁盘根目录下，开机自动升级；