Next change ~/.mplayer/config with an editor and change the video driver (vo=xv) and audio driver (ao=arts) and remove the last line.
Quickly installing Xine
Download the sources for libxine (xine-lib-1-beta12.tar.gz) from http://xinehq.de. Unpack it (tar xfz xine-lib-1-beta12.tar.gz) and change to this directory (cd xine-lib-1-beta12). Now run configure (./configure) and make ('make'). Install it as root ('su -c "make install"').
Recommended, for encrypted DVDs, install libdvdcss from http://developers.videolan.org/libdvdcss too.
Xine can use the codecs for MPlayer in /usr/lib/win32, however it can't find
after installing to see where it looks for the Real codecs. Either copy or
symlink for Xine to find them.
Quickly installing ffmpeg/ffserver
Download the sources from http://ffmpeg.sourceforge.net/. If the current version is 0.4.6, I recommend using a more recent CVS snapshot because it uses less CPU when grabbing a TV device.
Untar the source package, run './configure --enable-mp3lame' and 'make'. Install as root 'su -c "make install"'.
KMPlayer doesn't work with all the video drivers that mplayer supports.
I tested only xv (X Video Extension) and x11 (Image/Shm). If none work, you
might try the patch for the x11 driver and see if that works for you (not needed anymore for mplayer version >= 0.90-rc4).
You might need to change mimetype settings (Control Center | KDE Components | File Associations) to make sure KMPlayer (or 'Embedded MPlayer for KDE' in embedded tab) is set for all the formats you want to play with KMPlayer.
Also make sure in the 'Embedding' tab 'Show file in embedded viewer' is set.
If you run an older versio of MPlayer (0.9x), set 'Post MPlayer 0.90=false' in
.kde/share/config/kmplayer.rc under group [MPlayer]. It will change some of the