Gordian Knot 0.28.5.2 : Picture is too DARK

[netland]

Hi everyone, I use Gordian Knot 0.28.5.2 which is an excellent program but I have a problem. The final picture after encoding is too DARK. How can I solve this. Is there any option in GK settings? I tried to increase brightness in DVD2AVI option but it doesn't work: VIDEO=> Luminance Filter => I tick the case and increase Gamma and Offset. NO WAY in the final result.Can you help me please? Thanks!!!:)

[SiXXGuNNZ]

it has nothing to do with gknot

[netland]

How can I solve this, then?:(

[Blueseb]

use lumafilter within the avs script (do a search to learn how to use it;) )

[manono]

Hi-

If all the movies you do are too dark, then you can brighten them up in a couple of ways. One is in the overlay controls of your video drivers. And the other is the brightness settings of your player or decoder.

If only certain movies are too dark, then you can brighten them up by adding the Tweak (http://www.avisynth.org/index.php?page=Tweak) or Levels (http://www.avisynth.org/index.php?page=Levels) filters into the .avs before encoding.

[dihelson]

Originally posted by SiXXGuNNZ
it has nothing to do with gknot

Of course it isn't Gknot, may be the "Tons" of other software of the suite which change after each release...

Regards,
Dihelson

[Pulse]

@manono



If all the movies you do are too dark, then you can brighten them up in a couple of ways. One is in the overlay controls of your video drivers.



How do you access the overlay controls of your video drivers, and why would that change the brightness ?
I've had the "too dark" syndrom from some time now, and took the habit to Levels things up, but it seems from your post that i was missing the big picture somehow...:(

got a nVidia TI4200 card on one box, an ATI rage 128 on the other. Latest drivers from official site for a W98SE OS. Any hint for me ?

TIA,

[manono]

Hi-

I've got a 4200 on this computer, but it's a similar procedure with my AIW Radeon on another computer. I have the 44.03 drivers, but I think it's the same with older versions. Right click the Desktop, and then go Properties-Settings-Advanced-GeForce Ti 4200 Tab-Overlay Controls. Then adjust the Brightness and/or the Contrast to your heart's content. If you have a movie playing at the same time, you can watch it brighten up. I'm on XP. Does that make a difference?

Or if you have that NVIDEA Media Center in the SysTray, you can open that, then Adjust Display Properties, and follow the previous instructions.

[Pulse]

This is getting way OT (since GKnot isn't the culprit here) but thanks Manono for your answer.

Sure enough, on the nVidia cpl, the tab named "overlay" has brightness & other controls, which makes it a bit of a misnomer in my opinion (since those controls have nothing to do with overlay) !

I'll restate the question though, coz the 1st poster might have a point. Here is my situation :
* my monitor has been carefully adjusted using test patterns, tuning hard brightness & contrast so that i can clearly see all shades of gray from pure black to pure white,
* the lighting conditions in my room stay roughly the same day & night,
* soft controls (as seen in the nVidia control panel) are set to neutral (meaning brightness is at mid position, not adding or substracting anything),
* no other program is interfering with color controls AFAIK (I used to have some of those before my last reinstall),
* watching dvds using MSI DVD player (or ATI DVD player) give a good balance of dark and light areas in the picture,
* a "test" version of PowerDVD played noticeably darker though, until i changed preset,

Now, ripping the DVD (with dvddecrypter, clean PAL source), building a .d2v (with DVD2AVI, any one of the latest 3 forks), using it in a simple .avs (avisynth 2.5.2, i believe, with mpeg2dec3, some cropping and a LanczosResize) and monitoring with MPlayer, (M$ or Classic) or VDubMod gives a noticeably darker picture overall, 100% of the time.

No big deal, since i routinely add a Levels(0,1.0,200,0,255) to spread the histogram better and recover a brighter / not washed out picture. But strange nonetheless, and I kept asking myself what's the culprit.

This "darker" result (w/o correction) appeared suddenly a few months ago, but since i've been a little slow noticing it, i dunno what config change i might trace it to.

Probably not the right forum to ask, but moving this thread to someplace else would mean knowing which part is the likely cause ;)

what do you think ?

Pulse

[berndy2001]

hello,

i have this problem too, in previous versions, it was possible with a "gain" option in dvd2avi 1.76.

i updated now to 1.77.3 and there is only a "gamma" option instead. thats not not the same.

to use dvd2avi 1.76, i had to disable the use of the alternate mpeg2dec3.dll and i had to install avisynth 2.08, only to set up the gain a little bit...

i dont know if that works, but in the preview it looks fine...

isn't there an easier way...? i dont want to change the settings of the detonator driver, cause i want to code the luminance (brightness??) in the video, so it looks nearly same on an other pc too..

[jp80]

I think the solution may be in a setting of DVD2AVI if you're using this soft in your encoding process, precisely the color space, in YUV->RGB menu. The default setting everybody uses is PC scale, which has a smaller scale than the TV one, thus less brightness. So try to encode with TV.

[Soulhunter]

The default setting everybody uses is PC scale, which has a smaller scale than the TV one, thus less brightness. So try to encode with TV.
Hmmm... Thought TV has the smaller scale !?! :confused:

AFAIK, PC is full scale (0-255), and TV scale is limited... (no pure white/black) !!!

No matter, maybe I'm wrong... !?! ;)

Anyway, are you sure that AviSynth will take care of this scale at all ???

Bye