http://zzzmirror.i2p/posts/423
Then select RTP and Prefer UDP over RTP. Leave RTP address blank. Set UDP-over-RTP address to localhost. Set the UDP-over-RTP port to the port in config.sdl. Under Profile, pick Custom, with RAW encapsulation, Video codec unchecked, Audio Codec MP3, with the bitrate that matches the bitrate of your file, 1 Channel.