RubyIZUMIRubyIZUMI is an open source RTMP Server for Flash Video/Audio Streaming. It is written in (Pure) Ruby and it supports to broadcast MP4. You can watch it on the latest Flash player on your browser.

Flash Player VersionRubyIZUMI can play with the latest Flash Player version 9,0,115,0 and 9,0,124,0 I confirmed. To check your Flash Player version, use this: http://www.macromedia.com/software/flash/about/