resolution affecting file size and bitrate

[BinyaminGavriel]

Does anyone know of any formulae to calculate how changing the resolution will affect the final size of a movie (and therefore enable use of a higher bitrate for the same size)?
If anyone has done any comparisons that would also be helpful
Ben

[dragoman]

Yeah,

Check out this thread.

http://forum.doom9.org/showthread.php?s=&threadid=18277

Has some comparisons about what resolution actually does to bitrate and file size (you might be surprised, I was).

dragoman