Avisynth question

[Pisces225]

I've done tons of Avisynth reading lately, but I have a question I haven't been able to answer...

I've been using Lanczose resize to do my resizing, but I'm aware of others like Bicubic, Simple, etc.

My question is this: Which one is better, in which cases, and why? Thanks in advance to any info anyone can offer, even if it's just a link. And yes, I know there's no 'best' anything, but many times certain options are better in certain situations and rarely is one 'thing' a 'do the best all the time no matter what' something. Get it?

[Pisces225]

Here's another quick question... Are there certain Avisynth filters that are popular for increasing quality?

I try and use high quality sources and find the only area I have issues with is black screens or extremely dark shots showing blockiness. Anyone have a good filter or method of getting good blacks from CCE/Avisynth? I use pretty much all 700mb/1.2gb .avi DVD rips or .avi HDTV encodes with AC3 sound as a rule.

[tedkunich]

I've done tons of Avisynth reading lately, but I have a question I haven't been able to answer...

I've been using Lanczose resize to do my resizing, but I'm aware of others like Bicubic, Simple, etc.

My question is this: Which one is better, in which cases, and why? Thanks in advance to any info anyone can offer, even if it's just a link. And yes, I know there's no 'best' anything, but many times certain options are better in certain situations and rarely is one 'thing' a 'do the best all the time no matter what' something. Get it?

I would suggest that you head over to Doom9 and read up there... lots of info and suggestions.

As a quick answer to your query, Lanczose does some sharpening as it resizes. The others tend to soften images slightly. Which one to use all depends on your aplpication and the quality of the source material.


T

[Soopafresh]

Lanczos4resize is what I use 99.999% of the time.

As far as high quality AVISynth stuff is concerned, check out

https://www.videohelp.com/forum/viewtopic.php?t=273128

For reducing macroblocking, check out DGindex parameters - they work quite well.
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And yup, Doom9 is a excellent source of AVIsynth expertise.
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From a Doom post:
Point => Fast!, aliasing! Chunky graphics.

Bilinear => Quick, blurred and smooth (compresses very well)

Bicubic => Accuracy, control of blur vrs ringing, visually pleasing.

Lanczos(sinc) => High accuarcy, strong sharpening, some but controlled ringing.

Spline => Let the Jury retire to deliberate