divx calc question

[VERT]

how do divx calcs work in relation to output screen resolution for determinding bitrate for certain sizes?

[benderman]

Resolution dosn't matter for calculating the bitrate because the bitrate is calculated per second and not per frame or pixel.

The only problem may be that with a higher resolution there will be less bits per pixel and the picture will look more blocked. Sometimes a lower res gives a better picture-quality. With this formula

bitperpixel = bitrate [in kbps] * 1000 / (width * hight * framerate)

you can calculate how many bits are used per every pixel. If it is below 0.3 you should reduce resolution/framerate or increase the bitrate to get near-DVD-quality.