raspberrypi/userland — pull request #129 by ghollingworth (2013-12-22 12:31:28+00:00)
Title: Add circular buffer mode.

This commit adds the functionality to set up a circular buffer in memory
which stores the last N seconds of video. When the application is send a
signal or a key is pressed the last N seconds are saved.

Currently it seems to work well enough although there seem to be problems
with playing back some video using omxplayer when the GOP size is changed.