publish adaptive bitrate adobe flash

Is it possible to broadcast adaptive bitrate stream from flash As3 ? or I will have to use the "Flash live media encorder".

I am using Adobe Media Server and publishing stream as following

cam = Camera.getCamera();

cam.setQuality(0,100);

cam.setMode(512, 384, 15, true);

mic = Microphone.getMicrophone();

ns = new NetStream(nc);

ns.bufferTime = 1;

ns.attachCamera(cam);

ns.attachAudio(mic);

ns.publish("streamname1", "live");

and generating another connection for andother quality.

camAnd = Camera.getCamera();

camAnd.setQuality(0,70);

camAnd.setMode(256, 192, 15, true);

But  it change the quality of both the cam to lower quality.

Also I have tried h264 encording to publish multi-biterate stream.

ns_out = new NetStream( nc );

ns_out.attachCamera( cam );

var h264Settings:H264VideoStreamSettings = new H264VideoStreamSettings();

h264Settings.setProfileLevel( H264Profile.BASELINE, H264Level.LEVEL_1 );

cam.setQuality( 90000, 90 );

cam.setMode( 1280, 720, 30, true );

cam.setKeyFrameInterval( 15 );

ns_out.videoStreamSettings = h264Settings;

ns_out.publish( "1livestream?adbe_live_event=liveevent");

All the  documents available on adobe are publishing multiple steams through  "Flash media live encorder" but i want to publish it from my own flash  as3 application.

Please let me know if there is any doucmentation/tutorial available for this.

Thanks