Both MP3 encoding and decoding will soon be officially supported in Fedora. Last November the patents covering MP3 decoding expired and Fedora Workstation enabled MP3 decoding via the mpg123 library and GStreamer. This update allowed users with the
gstreamer1-plugin-mpg123 package installed on their systems to listen to MP3 encoded music.
The MP3 codec and Open Source have had a troubled relationship over the past decade, especially within the United States. Historically, due to licensing issues Fedora has been unable to include MP3 decoding or encoding within the base distribution. However, many users utilized 3rd party repositories to enable MP3 support.
A couple of weeks ago IIS Fraunhofer and Technicolor terminated their licensing program and just a few days ago Red Hat Legal provided the permission to ship MP3 encoding in Fedora. There will be a bit of time whilst package reviews are carried out and tools that are safe to add are identified, as only MP3 is cleared and not other MPEG technologies. However, it will soon be possible to convert physical media or other formats to MP3 in Fedora without 3rd party repositories.