"Fabio Sonnati (Fabio Sonnati)":http://flashvideo.progettosinergia.com have a detailed study of some important video format and their relation to Flash Video. There are two good optimization technique he explained in his "Technical Whitepaper (Technical WhitePaper about FlashVideo Technology)":http://www.progettosinergia.com/flashvideo/FlashVideoTechnologyAndOptimizations.zip, which he claimed can improve real-time flash video encoding by around 20-30%. For a video rookie like me, it was a good read. Helped understood lotta things which I was unaware of.

"Alternate Download Location (Download Technical WhitePaper about FlashVideo Technology)":http://www.brajeshwar.com/downloads/flashcom/FlashVideoTechnologyAndOptimizations.pdf (pdf)