De-noise filters

[Ktulu]

Hello all,

I'm quite new to AviSynth and I would like to know which fast and efficient de-noising filter is recommended when reauthoring DVDs.

Thanks.

[lark]

how about using the famous search button,
but i guess the short answer still is: it depends.
what are you really after? what's your source like?

regards
t :)

[Ktulu]

Originally posted by lark
how about using the famous search button,
but i guess the short answer still is: it depends.
what are you really after? what's your source like?

regards
t :)

Well actually I'm just looking for a filter that could help getting rid of random spots, "grain" effects like in old movies (ex: The Killing Fields, 1984).

Thanks.

[lark]

perhaps undot or removegrain...
or despot
regards
t :)

[Ktulu]

Thanks for the tips. I did a search but so many results poped up that I didn't go through the entire list...

I was also wondering if there are any "general purpose" filters that can deal with different kind of sources. What about spatio-temporal filters such as median ?

[lark]

i personally still use convolution3d (for historical reasons). sometimes, i'll give deen a chance. and for some specific sources i'll use golddust...

regards
t :)

[Ktulu]

I did a test with Undot and it seems to work OK. Then I tried FluxSmooth and it makes DCCE4U behaving strangely: it shows inconsitent video properties like 24 FPS, 10 seconds duration and a weird resolution (my source is PAL, 16:9, 720x576, 25 FPS, 1 hour 38 secs).

Here's the DIFF4U script I modified:

Import("C:\Program Files\DoItFast4U\new.avs\addaudio.avs")
LoadPlugin("C:\Program Files\DoItFast4U\new.avs\mpeg2dec3.dll")
LoadPlugin("C:\Program Files\DoItFast4U\new.avs\decomb.dll")
LoadPlugin("C:\Program Files\AviSynth 2.5\plugins\FluxSmooth.dll")
Mpeg2Source("VTS__01_P01.I-BFF.16~9_1.d2v",idct=7)
Telecide()
FluxSmooth()
AddAudio()
ConvertToYUY2()

It seems that DCCE4U doesn't like this script at all (as does ReAuthorist). I don't understand what is going on...

[Boulder]

Try opening that script in VirtualDub or WMP. You probably see a error message. If you are using the latest FluxSmooth dll, you should either use FluxSmoothST() (spatio-temporal) or FluxSmoothT() (temporal-only) IIRC.