MKVToolnix is a set of tools to create, alter and inspect Matroska
files. With these tools one can get information about  (mkvinfo)
Matroska files, extract tracks/data from (mkvextract) Matroska
files and create (mkvmerge) Matroska files from other media files.
Matroska is a new multimedia file format aiming to become THE new 
container format for the future. 

This requires libebml, libmatroska, wxGTK, and Boost.