https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/dc0f711459e0c682bf9f94ba38d26736e90cff45 Won't build otherwise.
commit 318f86f781b2ab420746c1d6f94ad5a23361be9d Author: Alexis Ballier <aballier@gentoo.org> Date: Mon Oct 3 10:29:18 2016 +0200 media-video/ffmpeg: remove faac (dropped upstream) Package-Manager: portage-2.3.1