c3d before or after resize

hi, do you use convolution3d before or after resize? and why? i've been using it after resize for awhile (for DVD rips), but saw quite many examples, where it has been used before resize. so i made a test and as i expected the encoding took about 50% longer when putting it before resize and the compressibility was a bit worse: flick: LOTR bonus: Quest for the Ring (21:27) DivX: 2-pass with 1200kbps script: LoadPlugin("C:\PROGRA~1\GORDIA~1\mpeg2dec.dll") LoadPlugin("C:\PROGRA~1\GORDIA~1\decomb.dll") LoadPlugin("C:\PROGRA~1\GORDIA~1\convolution3d.dll") mpeg2source("C:\FELLOWSHIP_BONUS\VIDEO_TS\1_2.d2v") Telecide() crop(8,0,706,480) BicubicResize(544,416,0,0.5) Convolution3d(0,4,4,8,8,3,0) this gave me av quant 4.407760 and filesize 192849920 when i moved convolution3d before bicubicersize, i got av quant 4.448165 and filesize was 192993280 i know that the filesize means nothing, because i was using 1200 kbps and the diff in quant is quite small, but the diff in encoding time was huge, because c3d had to process so much more pixels. regards t :)

Of course. Just do it anyway. It's puts hair on your chest.

I using filters after resize. Why? 1. It is faster 2. Strenght of noise is smaller (because resize- mainly bilinear, but bicubic too, eliminate lot of noise.

I using filters after resize. Because it is a faster and the quality is very similar. I like speed process time in another things, that give me more quality (i.e. the MPEG2DEC3 CPU=6)

@SILICON Sorry but I just couldn't exactly understand it from your post, and just to correct a possible misunderstanding (for those who might be not much familiar with MPEG2Dec3): A setting of cpu=6 with MPEG2Dec3 would also slow down the encoding considerably compared with a setting of cpu=0 (which means no pre-processing to the source); and quality-wise, harder pre-processing to the source absolutely doesn't guarantee more quality ;). best regards, iago

------------------------------------ The Best, but damm slow, is this: Convolution3D(...) BilinearResize(...) Convolution3D(...) :) (HarryM) ------------------------------------ Would be softer than air for my eyes! ;) I agree with vlad. "Best" is a very subjective and individually-biased notion, as a result of which there is no single, general "best" :). regards, iago

No, Vlad56 had it correct.