NixOS/nixpkgs — pull request #54 by aszlig (2012-07-18 11:40:05+00:00)
Title: ffmpeg: Add option to enable with x11grab support.

This is especially useful if you want to do screencasts and other sorts of things like that. This also involves updating ffmpeg to the latest version (0.11.1), as version 0.10 doesn't have x11grab support and it would be needed to patch it.