I did a Google search for H.264 and chose the Apple site over the Wikipedia. I believe they started using this format for the Keynote addresses a year or more ago. They seem to run pretty smoothly for me now, so my take is that it's capable of pushing a lot of information over the wires. http://www.apple.com/quicktime/technologies/h264/ Shirley On Oct 9, 2006, at 7:19 AM, CAM wrote: > > Can someone please let me know what the compression type H.254 is? I > usually use sorenson 3.