@sneaker_ger
The latest StaxRip test built makes mkv demuxing easy, you would choose:
Tools > Advanced > Demuxing > Demux a mkv file using mkvextract
It will show a file browser where you choose a mkv file and it will show a folder browser where you choose a target directory, it'll demux all streams in the mkv file to the target directory. If you are interested you can find the test built here:
http://forum.doom9.org/showthread.ph...09#post1362809