MP4 File Format Specification [closed]
Solution 1:
Here's the specification of the ISO base format, and here is the MP4 file format specification, both defined as part of the ISO/IEC 14496 standard.
Also take a look at the QuickTime MP4 specification. It has a very clear explanation.
Solution 2:
"ISO 14496-1 Media Format" gives a detailed description of the MP4 layout:
Solution 3:
The latest ISO doc is ISO/IEC 14496-12:2015. And you can download it at Licence Agreement... for free.