Stupid lines across the screen

[Jehovantodistaja]

Ok so heres the deal, I have a hauppauge wintv primio tv card. When I watch tv from my analog antenna source, it looks something like this:

http://personal.inet.fi/atk/jengi/tv/dscaler1.jpg
http://personal.inet.fi/atk/jengi/tv/dscaler2.jpg
http://personal.inet.fi/atk/jengi/tv/dscaler3.jpg
http://personal.inet.fi/atk/jengi/tv/dscaler4.jpg

Ok then, when I use virtual dub to capture, the video looks like this:

http://personal.inet.fi/atk/jengi/tv/virtualdub1.jpg
http://personal.inet.fi/atk/jengi/tv/virtualdub2.jpg
http://personal.inet.fi/atk/jengi/tv/virtualdub3.jpg

So what should I do ? Can I reduce those lines with some filters etc, since dscaler uses filters too, right ? Or could the problem be my 15 meter cable to the plug ? I think I could reduce it to 10 meters, but the plug isn't in my room so it's kinda tricky. Maybe our house has a bad antenna, dunno... :angry:

[lusid]

Try capturing at the same resolution you're using in Dscaler (768x576) and see if that helps.

[lemon]

Yes, at least at the same vertical resolution (Nx576).
If the vertical resolution is not 576 or 288 (480 and 240 for NTSC) you will always have interlacing problems.

Also, the images seem to show a weak TV signal.
Don't reduce the cable from 15 to 10 meters, I think it wouldn't help.
Better would be to put an antenna amplifier. They are cheap and improve a lot the signal, but are sometimes tricky to calibrate (you can have too much signal, causing a ghost effect), so first try to capture at that resolution, and if it looks bad, you can try to filter it with any smoothing filter

[Jehovantodistaja]

Thanks for the replies, I tried capturing with 768x576 and with 384x288, but the same lines still appera. I'm gonna get my hands on an antenna amplifier tomorrow.

If I capture cartoons, I can remove the lines with deinterlance, 2d cleaner and temporal cleaner. But with "irl" footage, it kinda sucks...

[Jehovantodistaja]

Ok heres like the results:

No ampilifier...
http://personal.inet.fi/atk/jengi/tv/noamp.jpg

Amplifier...
http://personal.inet.fi/atk/jengi/tv/amp.jpg
http://personal.inet.fi/atk/jengi/tv/amp2.jpg

[Koepi]

You can't compare the DScaler pictures with vdub images - dscaler uses plenty of filters for achieving the most pleasant picture quality, while vdub "captures what gets served".
The conclusion is, you have to apply such filters after capturing - then you can get the same quality.

I hope this helps.

Regards
Koepi

[Jehovantodistaja]

Yea but there isn't such filters for virtual dub...

[Boulder]

Maybe some shielded antenna cable would help?

[Malow]

in my old pc the hd flat cable make noise and strips in video if is close to capture card... put far from hd and cables... may help... or put a metalic shield around the board... hehe...

Malow..

[Malow]

i forgot, the strips and lines appears only on capture, not on use dscaler, because using dscaler do not use hd...

but when capture, the hd noise is "inserted" on video....
the flat cable do this... keep it far...

Malow

[^^-+I4004+-^^]

Originally posted by Jehovantodistaja
Yea but there isn't such filters for virtual dub...

?
vdub and avs have decent collection of filters to combat
noise etc.
lindsey dubb ported some dscaler filters to avisynth
(grape and peachsmoother,guavacomb....)
grape is yummmi,as the peach.......(didn't tried guava,don't need it...)

btw. what's wrong with
http://personal.inet.fi/atk/jengi/tv/noamp.jpg
http://personal.inet.fi/atk/jengi/tv/amp2.jpg
?

you have some mild chroma noise and that's it....
bare in mind that video captured to PC watched on monitor shows
more detailed image than tv-set.....therefore errors are easier to
spot........
take a look here
http://i4004.bizhosting.com/

it's sharper than your images only because i used bt8x8 tweaker....

also;dscaler deinterlaces,so you have an impression of smoother image
(because it IS smoother...) but you can deinterlace with vdub or
avs filters too........
one more thing;DS cannot capture...
VD can and with a bit of filtering you'll probably have beter results than those of DS.......

[vhelp]

Hmmm.. actually, I CAN see Line Noise in your first 4 pics, but being that
those pics were stills, it was harder for me to notice. However, your
encoder will see them, and your bitrate will suffer.
But, for an Attenna, it's pretty good quality !!

yes, definatly, your DScaler is doing some filtering, but not the filtering
you're thiking !!

Because vdub is not associated w/ DScaler, you are seeing those Line Noise.
I've suffered from them too !! before I got the ADVC-100 and connected it
to my Satellite.

I have a good EYE for Line Noise. As I've said before, I've suffered from
it too !! In short, you'll NEVER get rid of it. It's a combination of
your Capture's TV box (the shield inside it) and your CPU/MotherBoard
setup. I know that if you play your video clip in vdub, you'd see very
much so, the Line Noise. Drats!! It's a pain in the U-NO-What !!
If you can find the right MotherBoard and TV capture card combo setup,
you're good for go! Those peoples here, that claim they have no NO Line Noise
and are using such TV tuner capture cards should demonstrate what their
setup is.. as this will be an EYE opener for some. Other than that..

If you find a capture card w/OUT TV tuner, you good for go! ie, the DC10+
is a good card w/ NO Line Noise. It has NO TV tuner on-board.

Some things to forget about trying no matter what..
* Shielding (anything)
* Goldplated (anything)
* grounding (anything)
* re-wireing house, attenna etc (anything) $$
* wire thing-ga-ma-gigs and what-nots'
* new TV tuner cap card

I say this w/ great experience. I've ben there and DONE IT !!
After the dust had settled, it was the ADVC-100 ( and DC10+ ) cards
that won me over w/ no Line Noise.

-vhelp

[^^-+I4004+-^^]

> It's a combination of
your Capture's TV box (the shield inside it) and your CPU/MotherBoard
setup.

no,it's not;noise is visible
in any analog video....
tv tuner on the capture card
is not a good thing too (better use
vcr as a video source)
pc setup?
i don't have any problems or addition
of noise because of PC setup...

as i said i don't see
bigger problems in his recent screenshots..
(although you should of known better than to capture
snow....even if it has something wrong it's hard to spot...)
that "other" lines on the
passing car are normal combing artefacts and we all get them..
(all that capture to higher res that is...)
sometimes with enough noise,combing is seen on
the noise artefacts too....

for both "errors" use filters (deinterlacers and denoisers....
smothers to be precise...)

[vhelp]

hi all.

my applogies, I didn't realize poster was talking about Interlace.
I was looking at the Noise, not Intelace. Sorry for the confusion.

-vhelp