Filters

[vyciouss]

Hello! everbody...
My english its not very good, so I will try to be concise...

What filter can I use to remove noise in a movie?
I know there is a Filter Editor under Options, but I really dont know how to use it or how is the sintaxis...

I install a recently build of AviSynth... (22.04.06)
I hear something about unDot and Deen...

Sugestions about best filters are welcome!...

Thanks in advance...
vyciouss

[techmule]

Please search the avisynth forum for your answer. Also it depends on the source, so you might need to use different filters for different sources.

[Voodoochild]

What filter can I use to remove noise in a movie?


Well you can use removegrain(2) or removegrain(5) or hqdn3d(2).. you can download them from http://www.avisynth.org/warpenterprises/

deen() is very cpu demanding, it'll take you long time to encode. undot() is fast but wont remove any hard noise from movies. removegrain is fast and good but it can remove some fine details from the image .. so if you download it try different settings like removegrain(2) or removegrain(5) (you can check the manual when downloading it).

hqdn3d(2) is very good on most dvd sources it wont touch fine details and still remove noise, but it's slower then removegrain but not as slow as deen() is.

hope I helped,
Elad

hope

[vyciouss]

Thanks for the info Voodoochild...
I will try everything you say...

[jdobbs]

Just a heads-up.

Please be very careful when you decide to install new versions of software such as AVISYNTH. There have been some reported problems with the latest beta of that software that results in video garbage...

[vyciouss]

Thanks for the advice jdobbs...

[JohnGalt]

kinda o/t but didn't want to start a new thread. I almost invariably use half/half on my extras, as I want to back them up on the one hand, but on the other, I mostly care about the quality of the main feature. to make the half/half extras look half-way decent, I KISS them. I notice that RB puts KISS just before the resize. would it make more sense for me to move the line just under that? i.e.:

BilinearResize(352,480)
Undot().Deen()

if nothing else, that should speed up the processing time, right?

[edit]and how about "trim"? if KISS is before trim, is it processing the whole vts in each script, only to be cropped each time?

[jdobbs]

No. The position of the trim() statements won't affect the processing speed because of the way AVISYNTH works. I don't think the BilinearResize matters either... but I'll have to test that to be sure.

[JohnGalt]

cool -- thanks jdobbs. I'll just leave things as RB does it, then. RB knows best! ;)

[steptoe]

I'm using RemoveGrain, which is very good at doing what its designed for and still fast in removing noise and grain from old films especially black and white transfers to DVD from a poor source to start with. There are plenty of filter options to change how aggresive the filter is and also to change how it operates

It also has a mode that is exactly the same as undot, but the guy says as it uses SSE2 instructions is much faster


There are plenty of filters for avisynth, you can go on forever discussing them, just look on the avisynth forums, people spend literally hours tweaking the filters to get the best they can, and some filters are very, very slow

But time is no matter to some people, it the final quality that matters

[JohnGalt]

aight, thanks -- I'll check out RemoveGrain; I certainly have some shoddy-quality b&w films! as you say, time doesn't especially matter to me, but I just thought if I could save time by shuffling around the lines in the script, why not? but ultimately, as long as my encode can be done over nite, I'm content.