Noise in S-Video PS2 Captures

[Velocity 7]

http://webhome.idirect.com/~tihhhuhv/pattern.rar

While S-Video capturing footage from the PS2, I noticed this pattern was coming up. I didn't notice this before with Dreamcast S-Video captures using my DV footage, but now I'm noticing it with PS2 footage. Does anyone have suggestions on what in AVISynth might be able to filter out this problem?

[Velocity 7]

Here are some more examples of the problem at hand:
http://webhome.idirect.com/~tihhhuhv/sample1.jpg
http://webhome.idirect.com/~tihhhuhv/sample2.jpg
http://webhome.idirect.com/~tihhhuhv/sample3.jpg

These are JPEGs of another video capture. You'll notice the dotted patterns, just like the BMPs, are more easily visible on light, yellow areas (sample1.jpg, sample2.jpg) but not as much in dark areas (sample3.jpg).

Currently my avisynth script is:

AVISource(".Capture05-01-30_17-41.00.avi")
TDeint(mode=0, order=0, type=2)
Crop(42, 64, -38, -98) # picture only
Lanczos4Resize(640,344)
Trim(31,4234)

[Mug Funky]

hmm. strange.

it's possible that even though you're using s-video, the signal itself is composite (i believe s-video is capable of carrying composite signals, but i'm not so sure).

i got severe rainbows and dot-crawl with s-video captures when i was using the wrong colour-system on my teev and didn't notice it. i think something along the line falls back on composite when it can't do component properly, but i may be talking out of my arse. if you can mess with the colour system (PAL BG, or whatever), try that.

as far as filtering in avisynth goes, a simple blur-then-unblur can get rid of it with a loss in horizontal resolution. it's a quick and dirty solution...

[Velocity 7]

I already compared Composite and S-Video signals, and S-Video is definitely a lot sharper than composite is, which leads me to believe S-Video is giving different signals compared to composite. But that is a possibility, as you said, just the quality is quite different.

Mind you, in composite DV capturing, these patterns don't even show up at all. For PS2 that is.

Funny that Dreamcast doesn't come up with this crap. :(

There must be some High Quality Solution That Will Solve Everything(tm) in AVISynth or something...

[scharfis_brain]

I've seen this on my SAA7134 based card too.

you need to adjust the sliders of the image properties a little bit (saturation, brightness and contrast)

(the ones, you'll need to set up for balancing the image before doing the capture!)

[Velocity 7]

I can't set any properties for balancing image properties on a Sony DCR TRV-25 camera! :( It's firewire and the way it is it's like that.

[Velocity 7]

Okay, just checked with my camera. There is nothing I can do to change the picture quality whatosever. This is a Sony DCR-TRV25 DV camera, and it has nothing that will affect the S-Video picture, color, brightness/contrast, etc. whatsoever. I am still in need of a AVISynth solution. :(

[ATM]

Not sure if this would help but you could see if DeGrainMedian helps at all. That or you might just have to do a light smoothing with something like Deen to get rid of it.

[Guest]

S-Video cannot carry composite! Composite means the luma and chroma are carried on the same signal line. S-Video has one signal line for luma and one for chroma. You don't need a comb filter for an S-Video input.

This almost looks like dithering; it is too regular to be noise.

Just use any of several available detail preserving smoothers.

[IanB]

Velocity 7,

Looks like some form of mild interference signal.

Try wrapping your various cables through ferrite toroids and/or borrow higher quality signal cables.

Also check for earth loops, this usually only bites audio (hum) but it can occasionally jazz video. And try moving your various components as far apart as the cables will reach.

IanB

[easy2Bcheesy]

I had similar issues running an RGB SCART signal into my Matrox Meteor II/MC capture card. It seems that the PS2 is very prone to signal interference. I replaced the cheapo third party cable with the official Sony cable and it cleared it up instantly - the shielding on the official cables seems to be far superior. Maybe the same principle applies to S-video cables too?

[zilog jones]

Wow, you actually paid for the hideously overpriced Sony cable? It's 45 Euro here!

@neuron2:
You can have composite through s-video cables. I tried plugging an s-video cable into my non-S-VHS VCR for a larf (with a SCART adaptor), and my capture card just treated it as a normal composite input.