Just out of curiosity-are you sure it's CPU decoding, or do you have an odd setup?
Originally Posted by Awesomeness
A Core2 Duo would usually be integrated Intel gfx or Nvidia, which would mean vaapi support or vdpau.
But I don't know your hardware as well as you, I realize.
On a 1.6 GHz dual-core Neo with make -j1 (thermal reasons), I get ~15 minute compiles for mesa:
This is after installing the LLVM 3.3 snapshot from the appropriate repo.
./configure --prefix=/opt/mesa9x --enable-texture-float --with-dri-driverdir=/opt/mesa9x/lib --without-dri-drivers --with-gallium-drivers=r600 --with-clang-libdir=/usr/lib/llvm-3.3/lib
Kernel compiles I can't do all in one run, but it's less than a half-hour including time to cool down.
And libdrm is at most five minutes.
Due to the GPU version I'm stuck with the vdpau shader implementation at best.
On Ubuntu, you can currently add two PPAs (Oibaf or xorg-edgers, and mainline), install the new kernel and mesa, reboot, and that should be enough to get it working.
On Fedora or Debian it takes more work for lack of packages (does someone have OBS builds setup?).