How does a client send streams

A Sample AS3 code which does the same:

import flash.net.NetConnection;

import flash.net.NetStream;

import flash.events.*;

import flash.system.Capabilities;

import flash.media.Camera;

import flash.media.Microphone;

var nc:NetConnection;

var ns:NetStream;

var client:Object;

var camera:Camera;

var microphone:Microphone;

nc = new NetConnection();

nc.addEventListener(NetStatusEvent.NET_STATUS, script_ncStatus);

camera = Camera.getCamera();

microphone= Microphone.getMicrophone();

camera.setMode(160, 120, 6, true);

function script_ncStatus(event:NetStatusEvent):void{

var info:Object = event.info;

trace(info.code);

if(info.code=="NetConnection.Connect.Success"){

ns = new NetStream(nc);

ns.addEventListener(NetStatusEvent.NET_STATUS, netStatusHandler);

ns.attachCamera(camera);

ns.attachAudio(microphone);

ns.publish("myStream","live");

}

}

function netStatusHandler(event:NetStatusEvent):void

{

    try

    {

trace(event.info.code);

    }

    catch (error:TypeError)

    {

        // Ignore any errors.

    }

}

nc.connect("rtmp://<server-ip>/live");

Please note this is plain simple code , you can achieve much more than this