better resizer for Bluray > avi (xvid)

[split710]

Hi friends, I need a help

rip from Bluray to xvid-avi using avisynt/VDmod

I need to know what resize filter to use to realize my double and single xvid-avi from bluray source.

I always used SPline36Resize because I heard from a friend that every other resizer can produce oversized releases always. Is this true?

I would like to try some others because I think Spline don't save a the better definition and details (as I have seen on the same movies but encoded from someone else)

Can you suggest me better resizer for my questions?

BLURAY to 2CD Xvid-AVI (bitrate from 1200 to 1600)
BLURAY to 1CD Xvid-AVI (bitrate from 800 to 1000)

thanks

[neuron2]

I heard from a friend that every other resizer can produce oversized releases always. Is this true? What do you mean by "releases"?

[hello_hello]

When you say "I always used SPline36Resize because I heard from a friend that every other resizer can produce oversized releases always", are you referring to setting a target file size but ending up with something larger? If so, I doubt it's true. There are some builds of XviD which are broken in that department.

I use AutoGK a lot which uses LanczosResize and I also use LanczosResize mostly when encoding using MeGUI but to be honest I think the difference between the Spline and Lanczos resizers is very small.

A sharpening filter might have more effect on retaining detail than changing resizers (if used sparingly otherwise it can look unnatural). I think the resize filter you're using is pretty sharp. I don't really know much about the type of sharpening filters/plugins which AVISynth can use.

What about the XviD matrix? Do you use the standard h.263 matrix? The mpeg matrix is supposed to be a little sharper or you'll probably find some custom matrices you can try if you hunt around this forum. Or there's some info on this page: http://tech.icrontic.com/articles/ripping_dvd_xvid_ultimate_guide_20/
I've not had much experience using custom matrices myself.

Are you sure you're comparing apples with apples? Generally when I've seen someone else's encode of the same source and it looks noticeably sharper, it might use a custom matrix but the file size is also much larger. I'm not sure there's any way around that as a general rule.

[henryho_hk]

what is the resolution of the XviD AVIs?

[split710]

neuron

I mean rip for myself, i'm italian i used "RELEASE" thinking to REALIZZAZIONE that means in italian "to do something" about. consider my word RELEASE as "RIP", sorry for that confusion.

resolution depend of original AR should be from 640x to 720x

I normally use matrix MPEG (Non custom) for bitrate
900>1xxx, and H.263 for low bitrate (like 800>900)

Yes I mean that a friend told me that if I use other resizer target size will be larger that setted from me, but I never tried so not sure, I'm using Xvid-1.2.2-07062009 Final Release

[hello_hello]

The only time I've ever heard of oversized or undersized problems it's been to do with the XviD encoder itself. Even then I think you'd have to be using the home theatre profile. The way I understand it, that profile limits the bitrate for standalone devices and it's this which causes oversized or undersized problems with some XviD builds.

I can't imagine a resizer causing problems if you're using the same one for both passes (as I assume you would).

[henryho_hk]

First, H263 is not a matrix (we'd better call it an "algorithm"). Second, it is not really for low bit-rate scenarios. The EQM v3 LR custom matrix is much better, and Jawor's 1CD custom matrix as well. Remember to use a VHQ of 4.

For bluray with progressive footage, I think simple spline36resize() or even spline16resize() will do. For interlaced ones, I suggest applying simple bob() and then spline36resize() (or 16). Given the big shrink in resolution, there seems little need for sophisticated deinterlacers.

And since 800~1000kbps is a bit low for 720x400, I also suggest applying denoisers such as degrainmedian() followed by mdegrain1() (or mdegrain2() if it is a grainy movie).