Used documentation:

AVI:
  http://msdn.microsoft.com/
 (MSDN Home> MSDN Library> Graphics and Multimedia> DirectX> 
	DirectX 9.0 SDK Update (Summer 2003) C++> DirectShow> Appendixes>
 AVI File Format)

mp3:
	see mpeg

id3v1:
	http://id3.org/

mpeg, ifo: 
	http://dvd.sourceforge.net/dvdinfo/
	mpeg_sys source code (peeping a little :)
	http://www.andrewduncan.ws/ (MPEG 1,2 section)

ogm:  http://xiph.org/ and http://tobias.everwicked.com/

mkv:
	http://www.matroska.org/