Originally Posted by Mentar
Depends on the codec+container used - if the mkv contained a normal avi (e.g. xvid), you can easily demux it using the mkvtoolnix package (google for it), if it's a h264 encode, you can only extract it raw - and that won't help you much.
However, the whole point is that you can simply turn the softsubs off during playback. In this case the .mkv acts like a normal raw. Much better than demuxing.
Thanx for the help
I wanted raws from .Mkv to make Dynamic Gifs / Avtars mkvtoolnix
is a great help