Quantcast Strange Noise Patterns in Video Recording? - digitalFAQ.com Forums [Archives]
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05-21-2004, 10:20 AM
Hydeus Hydeus is offline
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Hi.
I've captured a sample material from cable, and it is cover by patern noise. This looks like PC power supply noise. This are horizontal luma lines on whole picture, couple pixels in period, mostly static, but drifting up-down-up-....
Any idea how to filter that

I've tryed this type of filters:
Quote:
avisource("capture.avi")
Limiter()
ConverttoYUY2(interlaced=true)
Fielddeinterlace(full=false, blend=false)
TemporalSoften(1,5,8,5,2)
peachsmoother()
Unfilter(60,0)
Undot()
MergeChroma(blur(1.5))
MergeLuma(blur(0.2))
DCTFilter(1, 1, 1, 1, 1, 1, 0, 0)
but it isn't gone a lot (<30%)
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05-21-2004, 10:43 AM
kwag kwag is offline
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Hi Hydeus,

Seems like noise geting into your video cables.
The only way to reduce that (if it's being induced in the cable) is by putting filters on your video cable ends. Like ferrite beads. You get those at RadioShack or similar stores.

-kwag
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05-21-2004, 10:59 AM
Hydeus Hydeus is offline
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Thx Karl.
Yes I know that this can be easly separated by analog filters if it comes through cable, but I suspected that maybe there is some avs filters solution.
I'm pretty sure that this comes from my computer, while TV set connected to the same cable gives me clear picture.
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05-21-2004, 11:21 AM
kwag kwag is offline
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Have you tried changing your capture card to a different slot
Sometimes it makes a hell of a difference

-kwag
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05-21-2004, 11:35 AM
Hydeus Hydeus is offline
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I'll try that Thx.
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