Missing library into package <xorg-x11-libs>

[Stephane Gaucher <Stephane Gaucher USherbrooke ca>]

I want to install mplayer's rpm
rpm -Ui mplayer-1.0-40_pre6a.rhfc3.at.i386.rpm


warning: mplayer-1.0-40_pre6a.rhfc3.at.i386.rpm: V3 DSA signature:
NOKEY, key ID 66534c2b
error: Failed dependencies:
        libviaXvMC.so.1 is needed by mplayer-1.0-40_pre6a.rhfc3.at.i386


I have check at www.pbone.net for this library and i fond this library
was into this package: xorg-x11-libs-6.8.1-12.FC3.21_1.rhfc3.at.i386.rpm

so lets install this packages

rpm -Ui xorg-x11-libs-6.8.1-12.FC3.21_1.rhfc3.at.i386.rpm



warning: xorg-x11-libs-6.8.1-12.FC3.21_1.rhfc3.at.i386.rpm: V3 DSA
signature: NOKEY, key ID 66534c2b
error: Failed dependencies:
        xorg-x11-libs = 6.8.2-1.FC3.13 is needed by (installed) 
	xorg-11-fs-6.8.2-1.FC3.13.i386
        xorg-x11-libs = 6.8.2-1.FC3.13 is needed by (installed)
 	xorg-11-6.8.2-1.FC3.13.i386
        xorg-x11-libs = 6.8.2-1.FC3.13 is needed by (installed)
	xorg-x11-devel-6.8.2-1.FC3.13.i386

no libviaXvMC.so.1 into the /usr/X11R6/lib folder

Can you help me !?!