Should have stayed awake during mathematics...

[mh2360]

I want to convert a divx file to VCD using Virtualdub to frame-serve. All is fine except I DON'T want use Tmpgenc to resize (it sucks at resizing IMHO), so im using Vdub to resize to 352x288 (PAL). The thing is, I want to make my VCDs aspect ratio 16:9 (anamorphic) instead of 4:3, to be viewed on a widescreen TV.

What I DO know is that to resize a 4:3, 576 x 240 file, say, I would divide 576 by 240, which gives 2.4. I then divide 352 by 2.4, which then gives me my VCDs height (without borders = 146 - not a lot of resolution there...).

What i want to know is what formula would i use to resize the file, to make it anamorphic?

[EddyH]

Maybe we both should have stayed awake in maths as i'm not 100% sure what you're trying to do with those instructions

A simpler method... for a "VGA" source (ie a divx where you can *hope* at least that the pixels are square), divide the source height by source width, then multiply by:

           NTSC         PAL

4:3       320           384

16:9      427           512

..and set your movie size to 352 x WhateverTheResultWas...

TV pixels are far from square, they're too 'fat' on NTSC and too 'thin' with PAL so to keep your video the right shape you have to pretend like there's less than 352 for ntsc, and more for pal (to be precise, 4/3rds of the full frame height, or 16/9ths ) when working out the vertical dimension.
(by this method, a 352 pixel wide picture should ideally be 264 high, but you very rarely see that happen)

Oh yeah, and then clip it to, at the very least, the nearest 16-pixel size to make the encoding a couple percents more efficient and 'cleaner' (nearest multiple of 32, even better, if it's close enough).