Matroska

Matroska (MKV/MKA extensions) is a wrapper format similar to AVI and OGM, but development on it is advancing much more rapidly.

Matroska contains advanced capabilities such as multiple audio tracks, subtitle tracks, chaptering, and possibly it's most important aspect- it is very extensible.

Below are download links to the Gabest Matroska Splitter. Another alternative is the Haali Media Splitter, which supports several wrapper formats (Matroska/MP4/MOV/OGM).

Download Gabest Matroska Splitter v1.0.2.9 for Windows 2000/2003/XP and Newer:
Mirror 1, Mirror 2.
MD5: 1609A8E2CC7D4A49D6260235FE053E77

Download Gabest Matroska Splitter v1.0.2.9 for Windows 95/98/ME:
Mirror 1, Mirror 2.
MD5: 9985DE7A74DC0D2D0D5580192935DBEB