Extract streams from WebM I hope my question fits the theme of this SE. 

Is there any software that can extract streams from WebM videos? I don't want to convert (re-compress), I want the streams intact. Thanks.
Quote: "Since WebM is a Matroska subset, mkvtoolnix should let you demux the files. It's open source, cross platform, and the author provides binaries for Windows."

Source: https://superuser.com/questions/412890/lossless-extraction-of-streams-from-webm