Advice on how to Improve/restore video quality with avisynth

ricardo.santos · 1st October 2012, 23:49

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

lansing · 2nd October 2012, 03:21

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

wiseant · 2nd October 2012, 03:26

@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

ricardo.santos · 2nd October 2012, 20:29

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?

lansing · 2nd October 2012, 21:27

what windows 7 are you using? 32bit or 64bit?

StainlessS · 2nd October 2012, 21:29

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

ricardo.santos · 8th October 2012, 20:23

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!

1st October 2012, 23:49	#1 \| Link
ricardo.santos Registered User Join Date: Mar 2005 Location: Portugal Posts: 908	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.

2nd October 2012, 20:29	#4 \| Link
ricardo.santos Registered User Join Date: Mar 2005 Location: Portugal Posts: 908	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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2nd October 2012, 03:21	#2 \| Link
lansing Registered User Join Date: Sep 2006 Posts: 1,370	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

2nd October 2012, 03:26	#3 \| Link
wiseant Registered User Join Date: May 2007 Posts: 143	@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

2nd October 2012, 21:27	#5 \| Link
lansing Registered User Join Date: Sep 2006 Posts: 1,370	what windows 7 are you using? 32bit or 64bit?

8th October 2012, 20:23	#7 \| Link
ricardo.santos Registered User Join Date: Mar 2005 Location: Portugal Posts: 908	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!