Icecast

Free software to do audio/video streaming

http://icecast.org

Icecast install

sudo aptitude install icecast2

The installed will ask you to set

• the domain name: keep it localhost
• access passwords

config

/etc/icecast2

Icecast clients

Extensive list

Ezstream

A command line source client for Icecast media streaming servers.

In its basic mode of operation, it streams media files or data from standard input without reencoding and thus requires only very little CPU resources. It can also use various external decoders and encoders to reencode from one format to another,

[1]

DarkIce is a live audio streamer. It records audio from an audio interface (e.g. sound card), encodes it and sends it to a streaming server.
DarkIce can record from:

    OSS audio devices
    ALSA audio devices
    Solaris audio interface
    Jack sources
    uLaw audio input through a serial interface
    CoreAudio (branch darkice-macosx)