Noise reduction before compression

Discussion in 'Amateur Video Production' started by _merlinO_, Nov 10, 2003.

  1. _merlinO_

    _merlinO_ Guest

    I'm ready to export an AVI file from Premiere Pro to TmpgEnc using the
    PluginPac Frameserver plugin. There's only a problem: the avi was
    captured from a VHS source and it has a lot of noise. If it's possibile
    I should reduce this noise with a temporal cleaner before compression.

    Can you help me?

    Thank you
    merlinO

    [I tried to use Avisynth instead the PluginPac Frameserver but it seems
    not to work with Premiere Pro so i can't use its noise reduction plugins
    :( ]
     
    _merlinO_, Nov 10, 2003
    #1
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  2. Virtual dub has a number of noise filters available. My personal
    favourite was Donald Graft's Smart Smoother. You can find it here:

    http://www.neuron2.net/

    It's better to zap the noise prior to compression. Otherwise, the
    compression algorithm spends valuable bits tracking noise in addition to
    the actual content you're trying to compress. Maybe you'll have better
    luck with Virtualdub's frameserver.

    Cheers,

    Chris
     
    Chris Mauritz, Nov 10, 2003
    #2
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  3. _merlinO_

    erratic Guest

    It should be possible to do this (frameserving twice):

    Premiere with PluginPac frameserver -> Avisynth or VirtualDub -> TMPGEnc

    You can then reduce the noise with Avisynth or VirtualDub. I once
    followed the same procedure with Vegas. It worked. TMPGEnc also has
    a noise reduction filter but it's very slow.
     
    erratic, Nov 10, 2003
    #3
  4. _merlinO_

    _merlinO_ Guest

    [...]
    I think I'll do this :)

    Thank you everybody!

    merlinO
     
    _merlinO_, Nov 10, 2003
    #4
  5. _merlinO_

    Martin Guest

    I've done a couple of mediocre VHS captures recently and wanted to do some
    very basic noise reduction on the audio track.
    I extracted the AVI audio to WAV with VDub and used Nero Wave Editor to do
    the noise reduction on the WAV.
    Nero Wave Editor is installed as part of the Nero 6 suite of utilities.
    Nero Wave Editor can do a noise scan of the WAV then perform a noise
    reduction tailored to the WAV from the scan - for VHS movies it's effect is
    excellent. :)
    Import the finished WAV back into your editor and use it as the audio
    source.

    A much quicker way to acheive a basic noise reduction than by encorporating
    the noise reduction into the re-encoding process.

    Martin.
     
    Martin, Nov 10, 2003
    #5
  6. I think the issue was video noise reduction, not audio.
     
    Lou van Wijhe, Nov 10, 2003
    #6
  7. _merlinO_

    _merlinO_ Guest

    [...]
    Yes, my question was about video noise reduction.
    I do audio noise reduction with Sounforge 7 which can open diretcly an
    AVI file and work on the audio track. Due to Ati's AIW limitations after
    audio operations I had to re-synchronize video and audio :(

    I've tried twice frameserving Premiere->VirtualDub->TmpgEnc, it seems to
    work fine, but the process take many hours so I see the results only
    this evening.

    merlinO
     
    _merlinO_, Nov 11, 2003
    #7
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