Today, a Third-Party Modified Version of the Fraunhofer FDK AAC Codec
Library for Android has been cleared for inclusion in Fedora. This
specific library has been modified to be useful with Linux and
gstreamer, and provides some support for encoding and decoding of the
AAC digital audio codec.
The package containing this library is called "fdk-aac".
No other AAC implementations (regardless of copyright license) are
permitted in Fedora at this time.