Filters before or after resize

[angelyote]

This is one of those broad questions that seems to fit into a small question...

How do you determine wether a filter should come before or after resize?

Some are obvious like decomb but what about things like con3d, cnr, msmooth or msharpen?

I was under the impression that they should always go before resize but recently so a thread that suggested putting some afte resize.

Thanks,
Dave

P.S. Should this be in the newbies section?

[MaTTeR]

IMO smoothers such as Conv3D seem to give better overall quality when placed before resizing. YMMV with other types of filters though. Like everything else around here, you need to do some comparison testing and pick which works best for you.

Speaking in general, most smoothers and sharpeners appear to work better before reszing.

[E-Male]

AFAIK smoothing before resize gives better quality, smoothing afetr resize gives better compression, but you always shoudl experiment with it

[scmccarthy]

Some of the filters over-sharpen and can be followed by a smoother. Some people like SimpleResize because it does not oversharpen. Sometimes you get artifacts from over compressing easy to compress frames. The solution to that is to add a little noise or sharpen a little. The goal is to have a smooth looking video that is sharp without looking pixelated. In addition, all these different filters are helping people with a large range of source material.

When you see someone recommending a filter setting, think about whether you are trying to process the same sort of source material. If someone says something works for them, it should carry more weight with you when it is someone who is using AviSynth for the same thing you are. Every observation is helpful, but what a filter is doing needs to be interpreted in light of how it is used.

Stephen

[jorel]

Originally posted by scmccarthy
Some of the filters over-sharpen and can be followed by a smoother. Some people like SimpleResize because it does not oversharpen. Sometimes you get artifacts from over compressing easy to compress frames. The solution to that is to add a little noise or sharpen a little. The goal is to have a smooth looking video that is sharp without looking pixelated. In addition, all these different filters are helping people with a large range of source material.

When you see someone recommending a filter setting, think about whether you are trying to process the same sort of source material. If someone says something works for them, it should carry more weight with you when it is someone who is using AviSynth for the same thing you are. Every observation is helpful, but what a filter is doing needs to be interpreted in light of how it is used.

Stephen

very wise explanation ,can't find better words.
;)
read this please:
http://forum.doom9.org/showthread.php?s=&threadid=38642
:)

[scmccarthy]

Well, Thanx!

Alway like to tread lightly, but being helpful requires a modicum of candor.

Stephen

[jorel]

Originally posted by scmccarthy
Well, Thanx!

Alway like to tread lightly, but being helpful requires a modicum of candor.

Stephen
sorry friend,i don't understand "a modicum of candor.",
my english is bad!:(

[RadicalEd]

Originally posted by jorel
my english is bad!:(

dont worry, my native language is english and I dont know what it means either :D