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Old 1st October 2012, 23:49   #1  |  Link
ricardo.santos
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Advice on how to Improve/restore video quality with avisynth

Hi everyone!

I'm trying to improve the video quality on a old music video clip, convert it to dvd resolution and hopefully be able to improve it.

A few years ago (2006) i asked for some help on a similar situation:
http://forum.doom9.org/showthread.php?t=112993

i followed some advices of that thread but im unable to improve the video, i tried the demo version of neat video + virtualdub but didnt help either, tried the noise filters in avidemux but i didnt see any difference.

Can someone help me/give advice on how to do it with avisynth? Perhaps the quality cant be improved?

here's the link to the video (10mb).
http://www.mediafire.com/?1cshqp3uh7xgps1


Thanks

Last edited by ricardo.santos; 1st October 2012 at 23:54.
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Old 2nd October 2012, 03:21   #2  |  Link
lansing
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those are not really noise but artifacts instead. dfttest or fft3dfilter would be a good choice in this case, you may need to add a dithering filter after for the banding problem
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Old 2nd October 2012, 03:26   #3  |  Link
wiseant
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@ricardo.santos

assuming Pal 1/2 dvd 352x576

I would open with ffvideosource

resize to (352,576) with your favourite resizer

use assumefps=25

use dfttest() - the default settings are slow - but it is better than fft3dfilter
then encode with HCenc or Quenc using dvd-compliant settings

e.g.
ffvideoSource("C:\video.mp4") - you'll need ffmpegsource -> http://code.google.com/p/ffmpegsource/
assumefps(25)
bilinearresize(352,576)
dfttest()

you will need libfftw3f-3.dll in system32 folder for dfttest
ftp://ftp.fftw.org/pub/fftw/fftw-3.3.2-dll32.zip
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Old 2nd October 2012, 20:29   #4  |  Link
ricardo.santos
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Hi
Thanks for the advices and tips, been trying to setup dfttest but while playing the avisynth script a message pops up saying there isnt a function called dfttest().

i copied the dll to windows/system32 folder, im using windows 7, i tried to copy the contents from the fdttest zip to avisynth plugins folder but same message appear, can anyone help?

Last edited by ricardo.santos; 2nd October 2012 at 20:36.
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Old 2nd October 2012, 21:27   #5  |  Link
lansing
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what windows 7 are you using? 32bit or 64bit?
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Old 2nd October 2012, 21:29   #6  |  Link
StainlessS
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Requires libfftw3f-3.dll to be in the search path eg system32 (or syswow64 on 64bit, I think).
dfttest.dll in Avisynth plugins dir.

EDIT:
Quote:
i tried to copy the contents from the fdttest zip to avisynth plugins
Best if you remove everything in zip from avisynth plugins except dfttest.dll
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Last edited by StainlessS; 3rd October 2012 at 16:28.
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Old 8th October 2012, 20:23   #7  |  Link
ricardo.santos
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Hi everyone!

Thanks for all the info/help, just in case anyone finds this thread in the future, the dfttest.dll isnt in the zip links provided in the previous comments, thats why it wasnt working

the correct link for the 2 files (libfftw3f-3.dll and dfttest.dll) is:
http://web.missouri.edu/~kes25c/dfttestv18.zip

Thanks everyone!
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