Gnash, the Free Software Foundation's work on an open-source Adobe SWF/Flash player, can now handle RTMP streaming of audio/video/data from servers.
RTMP is the Real Time Messaging Protocol that was developed by Macromedia/Adobe for streaming audio, video, and data between a Flash Player and an Internet server. Adobe had released an incomplete version of the RTMP specification to the public and now it's implemented by the FSF Gnash Flash Player.
For those unfamiliar with the Real Time Messaging Protocol, additional information can be found on Wikipedia
. The RTMP support was added to Gnash with this Git commit