Media_build is a build system for media drivers. It can be used to add the latest drivers for your system without actually updating the kernel.
If you came here just to find out how you can update your media drivers, you can follow this chapter. In case you have the needed build tools already installed, you can pretty much run the following commands to update the media drivers to the latest. You will need internet connectivity and you need to have git installed on your system.
git clone git://linuxtv.org/media_build.git cd media_build ./build sudo make install
When you run ./build the system will check automatically, if you have the necessary packages installed. If not, it will tell you what to do in order to install them if you run one of the mainstream distributions.
The easiest way to start using your new drivers is to restart the system after the make install command.