https://blog.csdn.net/explorer_day/article/category/6289310/2
https://www.cnblogs.com/tocy/p/ffmpeg-framework-analysis.html
https://blog.csdn.net/fakine/article/details/79076072
http://blog.sina.com.cn/s/blog_48f93b530100jz4x.html
https://blog.csdn.net/dxpqxb/article/details/42266811
https://blog.csdn.net/chenshengfa/article/details/50512616
http://www.52rd.com/Blog/wqyuwss/559/ MP4文件格式
https://blog.csdn.net/lxmnet123/article/details/10734717 详细对MP4文件的定义