Pixel flickers around text as video plays

[madness]

Hi all,
I've just come across this artifact I just don't how to fix and which filter will sort it out. Basically, the pixel of the image just flickers sort of like ant crawling. I've try getting different TV caps but all of them have it so I wonder if you guys could help me so I can try eliminate this artifact.
I've attach an image to show you.
http://www.madforums.net/Image2.jpg

[Wilbert]

It's called dot crawl. See

http://www.doom9.org/index.html?/capture/chroma_artefacts.html

[madness]

i tried the guavacomb that didn't really help even with the strongest setting. do anyone have any other suggestions on how to sort it out?

[JuanC]

Originally posted by madness
i tried the guavacomb that didn't really help even with the strongest setting. do anyone have any other suggestions on how to sort it out? That problem comes from an analog source, right? (analog TV? vhs composite ouput?). Lindsey Dubb (HighSpeedDubb, author of guavacomb and peachsmoother filters) explains in guavacomb html file: luma / chroma interference produce artifacts like dot crawl.

Here some settings that work with my analog tv captures:separatefields()
GuavaComb(Mode = "NTSC", Recall = 75, MaxVariation = 25, Activation = 90)
PeachSmoother()
weave()
Very important: look at HighSpeedDubb's posts in this thread (http://forum.doom9.org/showthread.php?s=&threadid=60369&highlight=peachsmoother+separatefields): Guavacomb and Peachsmoother work best when applied on fieldbased (separated fields) video clips, AND before any other filter in the chain.

[Tri]

I found the DotCrawl Comb Filter (http://home.earthlink.net/~tacosalad/video/dotcrawl.html) for VirtualDub works better than guavacomb, but I didn't try in conjunction with separate fields and peachsmoother.

Only problem of the DotCrawl Comb Filter is that it gives nasty artifacts during colour flashes (disabling the temporal comb filter removes this effect but it works less effective then).