解析MP4文件源码 树形结构显示每一个box（atom）的长度和字段值-analysze MP4 file source code，show each box type and len， also fileds value of the box。

Atom needs data in little endian format so swap as appropriate when copying data to or atom.-Atom needs data in little endian format so swap as appropriate when copying data to or atom.

Atom needs data in little endian format so swap as appropriate when copying data to or atom.-Atom needs data in little endian format so swap as appropriate when copying data to or atom.