Megui color correction

[cy]

Hi,

I've recently started transcoding my dvd's using Megui.
(Great app btw)

I've noticed that when i apply "color correction", the colors in the encode are slightly off in comparison with the original dvd.
Colors seem to be a bit paler.

If i don't check "color correction", the colors seem the same.
So far, i've noticed this on each and every transcode i did.

So ok...no problem then...don't apply it.

But, i thought this was necessary with dvd sources because "mpeg2 streams are encoded using a different set of coefficients as used by Avisynth's color conversion routines etc.."

Just want to make sure i'm not making a mistake here.
However, my eyes tell me not to use the color correction in Megui.

Can't imagine the smart folks who coded this app would implement a "seemingly" useless feature.
So i wonder why this color correction seems to do more harm then good with my transcodes?

[Sharktooth]

coz the dgindex build included in megui reports a wrong color scale.
it will be corrected in a near future.

[cy]

Well, that explains it then.
Thanks!

[seb37_2]

Hi (sorry for my bad english)

I make test with Megui/x264, for the moment is for me the best result with automated 3pass.
But i want to change the color and the contrast (i loss quality with the encoding.
For the moment i use Megui and avisynth script, i have as source avi uncompressed 720p (my first source before éditing was mp4 hd 720p xdcam ex)

So i read many thing but i dont know how to proceed (because i a newbie^^ and i dont understand avysynth, gui, script...)

so questions is :
-how to install and use script for color correction and contrast/brigthness correction with megui ?
- i read i must change color yuv tv to pc but How to do that mith MeGui ?
- i try to make the option "noise filter" but megui stop me and say "Supports YUY2 color format only, how to proceed with that

and i precise, my objectif is a web diffusion, not tv.
Many thanks for your help.
:thanks:

[check]

But i want to change the color and the contrast (i loss quality with the encoding.Shouldn't Happen. The most common causes are:
o Your testing is flawed (eg, using a broken renderer/decoder for the source or encode)
o Your source decoder / filtering is borked (eg, using a broken decoder for your videocam footage)

[seb37_2]

Hi
You right, i don't lose quality but i make editing for tv, now i want make this editing for web diffusion, so for exemple Canponus have filter to ameliore image for web diffusion (contrats, saturation, color...).

So it's possible with MeGUI ?
-how to install and use script for color correction and contrast/brigthness correction with megui ?
- i read i must change color yuv tv to pc but How to do that mith MeGui ?
- i try to make the option "noise filter" but megui stop me and say "Supports YUY2 color format only, how to proceed with that

Thanks by advance, i search but i am so newbie with this program :(

[Sharktooth]

1 -you dont need to "install anything", you just have to learn avisynth scripting and modify the default avs script that megui creates thru avisynth script creator.
concerning scripting, hava a look at the avisynth usage forum.
2 - You have to change it in your renderer or decoder, not in megui.
4 - converttoyuy2 avisynth filter (see point 1)