MKVtoolnix is a collection of programs for creating, editing, and inspecting Matroska (MKV) files. It includes merge tool, header editor, and chapter editor. It can be used to accurately edit chapters; you can specify start/end of chapters with nano-second precision.
Split MP3 files into smaller parts or join MP3 files together into a bigger one.
Comments (3)
if they add in ability for more video types to be muxed into mkv container it will be even more perfect.