Enable ffmpeg/libav-based audio/video codec support

Packages describing “ffmpeg” as local USE flag

Package“ffmpeg” Flag Description
dev-games/simgearEnable video recording via media-video/ffmpeg
games-emulation/fceuxUse media-video/ffmpeg for video recording
games-strategy/hedgewarsEnable video recording feature
gui-apps/waypipeLink with ffmpeg to allow buffer displays using video streams
sci-mathematics/mathematicaEnable media-video/ffmpeg backend support

All packages providing a “ffmpeg” USE flag (57)