brewkit.rb changes ENV destructively, so lets not do that everytime a formula
is required. Now it's possible for other tools to require a formula
description without worrying about side-effects.
The formula is 10.6 only because it compiles 64 bit, if you are a Leopard user
please patch! The MACOS_VERSION constant may be useful.
FFmpeg is a complete, cross-platform solution to record, convert and stream
audio and video. It includes libavcodec - the leading audio/video codec
library.