mplayer-for-windows change color scheme in win 7

Q：

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When I play movie on Windows7, always comes this message:

The color scheme has been changed
The following program has performed an action that requires Windows to temporarily change the color scheme to Windows 7 Basic.

Why?
There is a solution?

A：

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Add the following line to 'mplayer\config' (use Notepad or another text editor):

vo=direct3d

MPlayer uses the directx video driver by default which causes that and needs to be changed to direct3d or gl. Prefer direct3d over gl.

quote：http://code.google.com/p/mplayer-for-windows/issues/detail?id=9