The LinuxTV community develops and maintains the Linux Kernel Media Subsystems and several userspace libraries and applications.
The Linux Kernel Media Subsystems provides support for devices like webcams, streaming capture and output, analog TV, digital TV, AM/FM radio, Sofware Digital Radio (SDR) and remote controllers. It offers native support for a large number of drivers for commonly available PCI cards and USB devices, but the subsystems are also targeted towards Linux based set-top-boxes and embedded devices, like mobile phones.