Layer selection is done as "subdevice" - integer nuber after -vo
directfb: where -1 is autodetection and 0,1,2... are for layers
example: mplayer -vo directfb:2 -dfbopts matrox-crtc2,matrox-tv-standard=pal *.avi
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@8138 b3059339-0415-0410-9bf9-f77b7e298cf2