MediaInfo supplies technical and tag information about video or audio files (MKV/AVI/MPEG1, 2, 4/MP3/AAC/…
There are several versions: Graphical interface, Command line, or DLL for third-party software developpers (like emule). 
GUI is multi-language. 
 
This is a major release: a lot of format support (3GP, DTS-HD, Musepack, Quicktime HD…) 
 
This is a MS-Windows release, but a linux version will come soon. 
 
MediaInfo Project homepage:  
http://mediainfo.sourceforge.net/ 
 
You may download MediaInfo from: 
https://sourceforge.net/project/showfiles.php?group_id=86862