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Noise Filtering

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Does anyone know a noise filter that doesn't blur the image too much? I'm cutting in Vegas, but can export as avi if the noise filter is a stand-alone program.
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There are plenty of plugins available for VirtualDub or AVISynth.

Smart Smoother High Quality is a good spatial denoiser for VirtualDub, which tries to keep edges sharp.

For AVISynth, there is fft3dfilter, a spatio-temporal denoiser with loads of options that I haven't really worked out how to use. And the old Pixiedust is good but slow. There's also a new function you can find at Doom9 called RemoveNoiseMC which seems to give good results.

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