You don't. It has not got any colour controls. You could try VLC Media Player which does. http://www.videolan.org/vlc/
I mean that VLC can play mkv's containing AVC/h.264 streams. Don't know what is going on your end. Personally I am not a fan of VLC anyway. I prefer mplayer.
mplayer != MPC. With mplayer you can use various keys to adjust colour, brightness, etc. Don't really use that feature myself though anyway.
From input.conf: 1 contrast -1 2 contrast 1 3 brightness -1 4 brightness 1 5 hue -1 6 hue 1 7 saturation -1 8 saturation 1
when i hit.. 2= the display-bar gows away 3= the display-bar show again 4= nothing habbens where du you se this.. From input.conf: 1 contrast -1 2 contrast 1 3 brightness -1 4 brightness 1 5 hue -1 6 hue 1 7 saturation -1 8 saturation 1 a path would be nice. cheers
Well in the source package it is in the etc folder. For my builds it comes in the ./mplayer folder, but should be installed to %APPDATA%\mplayer except for builds compiled with CPU runtime support. By the way mplayer doesn't have a display bar. Sounds like you are still using MPC. So once again, mplayer is NOT Media Player Classic.