Why does flash drop frames ??

I have been conducting some tests and am totally lost as to why flash based broadcasting drops frames.
The genral formula for calculating bitrate is :
bitrate = Width x Height x FPS
Now if this value is lower than Camera.bandwidth then why should flash still drop frames ?? Any assistance/ideas is greatly appreciated.
I have checked with FMS performance tab: bytes in is well bellow Camera.bandwidth as well , but still flash drops frames... why??

oh! you dont have to be an engeer to answer that. I reported you because i saw you had 306 points. Which means you had to be a serious guy giving a serious answer. If you had read my question (you may want to read it again just in case).. here is the answer to it that i could find on my own. There is no need to get things complicated, god created things simple eniough
Refer to http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/media/Camera.html
You will see that when we apply setMode funtion to request a width, height and fps, flash will request the device for closest native settings of the camera. I am pasting it here so everyone can read:
By default, Flash Player drops frames as needed to maintain image size. To minimize the number of dropped frames, even if this means reducing the size of the image, pass false for the favorArea parameter.
When choosing a native mode, Flash Player tries to maintain the requested aspect ratio whenever possible. For example, if you issue the commandmyCam.setMode(400, 400, 30), and the maximum width and height values available on the camera are 320 and 288, Flash Player sets both the width and height at 288; by setting these properties to the same value, Flash Player maintains the 1:1 aspect ratio you requested.
So as you see its a simple thing, nothing so complicated as NETWORKING, ALOHA , TCP/IP etc etc . If you wil notice all the situations i have stated, it clearly implies frame drop happens regardless of any bandwidth settings as soon as i go over a certain resolution.
Haver a nice day! Cheers

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