an old problem has re-appeared >_<

post-it · Post by **post-it** » Sat Jun 09, 2007 11:35 pm

I .. I just .. I just can't remember a thing about how this could happen -- which is why it re-appeared:

in the actual video, it is almost black on white making a rainbow of colors - which shouldn't be happening ... and I can't remember what causes this problem!!

can you help .... please

... xvid 1158k single-pass

Kariudo · Post by **Kariudo** » Sun Jun 10, 2007 12:47 am

that's rainbowing. It occurs in areas of high contrast, IIRC it's an encoding artifact.
to get rid of it, I find that Tcomb() works really well. (part of the tivtc package)

I'm probably going to screw up the names, but Scintilla has made a few de-rainbowing filters: DMFDeRainbow and LUTDeRainbow

you can get tcomb() here
Scintilla's thread

CrackTheSky · Post by **CrackTheSky** » Sun Jun 10, 2007 2:55 am

There's also the mfrainbow filter that comes with the AMVapp, but it's a sloooooowww sonuvabitch.

post-it · Post by **post-it** » Sun Jun 10, 2007 5:55 am

-Kariudo-
. Thank You ^_^
. . I am currently messing with the settings to "just" tone-down the affected are - yeah, I think it has a great deal to do with the Codec; it re-appears after encoding to Xvid sooooo ... lets give H-264 a try again ^_^

-CrackTheSky-
. Speed is not an issue for me because different scene's are cut into different encoded rates THEN joined together for the final container.
. . yup, I'm only dealing with one small section here.

THx

Scintilla · Post by **Scintilla** » Sun Jun 10, 2007 3:09 pm

Kariudo wrote:Scintilla's thread

Dammit, every single one of those images is a broken link now that my 1and1 promotional package has expired.

Here's where those images SHOULD be linking (warning, all PNGs are lossless):

Image 1 (Azumanga Daioh movie): <a href="http://www.aquilinestudios.org/compare/LUT1.png">U channel (blue offset) before and after LUTDeRainbow</a>
Image 2 (Azumanga Daioh movie): <a href="http://www.aquilinestudios.org/compare/LUT1.png">U channel (blue offset) before and after LUTDeRainbow</a>
Image 3 (Azumanga Daioh movie): <a href="http://www.aquilinestudios.org/compare/ ... ">Original image before</a> - and <a href="http://www.aquilinestudios.org/compare/ ... png">after derainbowing</a>
Image 4 (Angel Sanctuary): <a href="http://www.aquilinestudios.org/compare/LUT4.png">U channel (blue offset) before and after LUTDeRainbow</a>
Image 5 (Angel Sanctuary): <a href="http://www.aquilinestudios.org/compare/LUT5.png">U channel (blue offset) before and after LUTDeRainbow</a>

post-it · Post by **post-it** » Sun Jun 10, 2007 7:20 pm

I found out that you CAN over do it with that filter >_< ... anyways, here is the After ^_^

THx

YouTube · Post by **Kionon** » Sun Jun 10, 2007 10:11 pm

Why not use SDDRainbow()?

post-it · Post by **post-it** » Mon Jun 11, 2007 9:52 pm

SDDRainbow() ... ? ok, I'll bite -- whats the difference in one over the other?