Live from webcam

how to publish live video feed from webcam in h.264 format non VP6 format with FMS 3.5.2

without using Flash Media Live Encoder, and how to set all parameters
to have a good quality and smooth video without interruption,

i have a server with 50Mbit bandwidth output enough for a publisher and 10 clients

please help me
understand this thing's been months since I try but the quality ugly

grazie a tutti!