Introduction to RED5
Red5 is an open source media server for live streaming solutions of all kinds. It is designed to be flexible with a simple plugin architecture that allows for customization of virtually any VOD and live streaming scenario. Red5 has been and is being used by thousands of companies from Amazon to Facebook.
Red5 is implemented in Java, which provides services similar to those offered by the proprietary Adobe Flash Media Server and Wowza Streaming Engine including: Streaming Video (FLV, F4V, MP4, 3GP) Streaming Audio (MP3, F4A, M4A, AAC)
References:
http://red5.org/