Put this in your /etc/apt/sources.list
Code:
# Stable:
deb ftp://ftp.nerim.net/debian-marillat/ sarge main
# Testing:
deb ftp://ftp.nerim.net/debian-marillat/ etch main
# Unstable:
deb ftp://ftp.nerim.net/debian-marillat/ sid main
deb-src ftp://ftp.nerim.net/debian-marillat/ sid main
then as usual, apt-get update, apt-get install mplayer.
to be precise, these are available:
mplayer-586 1:1.0-pre7cvs20060219-0.1
mplayer-nogui 1:1.0-pre7cvs20060430-0.0
mplayer-nogui 1:1.0-pre7cvs20060325-0.3
mplayer-nogui 1:1.0-pre7cvs20060219-0.2sarge1
mplayer-k6 1:1.0-pre7cvs20060219-0.2sarge1
mplayer-586 1:1.0-pre7cvs20060219-0.2sarge1
mplayer-386 1:1.0-pre7cvs20060219-0.2sarge1
mplayer binaries has builtin runtime cpu detection so it is already optimized for a lot of architectures/cpus. (At the beginning it detects on which architecture it is being run and executes different code with optimizations. So the detection part can be skipped but I'm not sure it's really faster for watching anything.)
Also I bet mplayer is quite hard to compile. It can be intersting to recompile if it lacks support for this or that codec but I'm sure you will always find a prebuilt binary.
And if you need gtk-devel, just apt-get install libgtk2.0-devel for gtk2
Gnome-devel pulls something like 100 dev packages (X11,sound,..)