Memory-to-memory multimedia devices


Linux Kernel Configuration
└─>Device Drivers
└─>Multimedia support
└─>Memory-to-memory multimedia devices
In linux kernel since version 2.6.35 (release Date: 2010-08-01)  
Say Y here to enable selecting drivers for V4L devices that
use system memory for both source and destination buffers, as opposed
to capture and output drivers, which use memory buffers for just
one of those.