Recording a Flash Video from Webcam

Basically,my purpose is to record the video from the webcam by clicking on the "Record" button and stop recording the video when I clicks on "Stop" button. Then on clicking the "preview" button it will play the recorded video.

Can I achieve the above job without using rtmp? I am new to FMS and I am not getting any clue to solve this problem. Please, help me where I am making the mistake in my below code.

// Capturing the Web Camera & Video
var my_cam:Camera = Camera.get();
myVideo.attachVideo(my_cam);

//Streaming and Recording the video
var rtmpNow:String = "rtmp:/localhost";
var nc:NetConnection = new NetConnection();
var ns:NetStream = new NetStream(nc);
nc.onStatus = function(info) {
if (info.code == "NetConnection.Connect.Success") {
status_txt = "Connected";
} else {
status_txt = "No Connection";
}
};
nc.connect(rtmpNow);


function record() {
if (record_btn.label == "Record") {
record_btn.label = "Recording";
ns.attachVideo(my_cam);
ns.publish("simanta", "record");
trace("record video");
} else {
ns.close();
record_btn.label = "Record";
}
}

function stoprecord() {
if (stop_btn.label == "Stop") {
stop_btn.label = "Stop";
record_btn.label = "Record";
ns.attachVideo(my_cam);
ns.publish(false);
trace("stop recording");
} else {
ns.close();
record_btn.label = "Recording";
}
}

record_btn.onRelease = function() {
record();
trace("gsjfjhf");
};

stop_btn.onRelease = function() {
stoprecord();
trace("qwqwqw");
};