MP4 3GPP 3GPP2 文件关系图

Relations between ISO/IEC Base Media File Format, MP4 File Format, 3GPP file format and 3GPP2 file format. Based on the 3GPP2 technical specification published on 18 May 2007

参考网址：

https://en.wikipedia.org/wiki/ISO/IEC_base_media_file_format