Binary file layout reference

Question

Where are some good sources of information on binary file layout structures?

If I wanted to pull in a BTrieve index file, parse MP3 headers, etc. Where does one get reliable information?

Answer 1

Not comprehensive, but useful nonetheless: http://www.wotsit.org/

Answer 2

I'm not sure if there's a general information source for this kind of information. I always just search on google or wikipedia for that particular file type. The binary file layout structure information should be included.

For example, http://en.wikipedia.org/wiki/MP3#File_structure">MP3 file layout structure