Multimedia
Theora 1.1
Fedora 12 ships with an improved version of 
libtheora
Volume Control
Following in the foot steps of Fedora 11 volume control now includes profile support, better input switching, and fade control. --Needs More--
Thusnelda
In support of Free Culture, the open web and to reduce the hold of proprietary and patent encumbered codecs, Red Hat has been sponsoring improvements on the open Ogg Theora video codec implementation codenamed Thusnelda via Christopher Montgomery (xiphmont), who created the format and work has resulted in drastic improvements to the codec. This release features this next generation codec. All applications using libtheora library including all the Gstreamer applications will automatically and transparently be taking advantage of the improvements.
PulseAudio Enhancements
Fedora developers have been made several improvements to the PulseAudio system. More details here. These include the following:
- A New Mixer Logic
- UPnP MediaServer Support
- Hotplug Support Improved
- Surround Sound Support for Event Sounds