Jpeg:
https://www.cnblogs.com/Arvin-JIN/p/9133745.html
https://thecodeway.com/blog/?p=69
http://www.robertstocker.co.uk/jpeg/jpeg_new_1.htm
视频:
https://www.cnblogs.com/xkfz007/archive/2012/08/12/2613690.html
