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Clipfinder CC - diferent results

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Paul Flint
Clipfinder CC - diferent results
on Oct 14, 2009 at 8:51:28 pm

I am trying to figure out the problem but after an hour of testing I have no clue.

before I output footage for editing I use clipfinder to create a look that is comfortable for editing purposes. The problem is that every time I tweek colors I get completely different results when I recreate proxy QT. Same color shift follows when I output to ProRes4444 or uncompressed10bit or even DPX. It is a pain to do it over and over again since the image I get when I have color controls is not the one I get at the end.

Here is a screen of what I'm talking about
Anyone have any idea what could cause this ?
thanks in advance

http://dl.getdropbox.com/u/1973447/Picture2.jpg


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Russell Lasson
Re: Clipfinder CC - diferent results
on Oct 16, 2009 at 9:42:37 pm

Looked at your screen shot. Where is the rendered file to compare the difference?

-Russ

Russell Lasson
Colorist/Digital Cinema Specialist
Color Mill
Salt Lake City, UT
http://www.colormill.net


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David Battistella
Re: Clipfinder CC - diferent results
on Oct 16, 2009 at 10:45:45 pm


Paul,

There is a known difference between the LOUPE and QT windows not matter what you do. I am afraid you are in a bit of a trail and error problem here. It's better in SNOW leopard as what you are seeing is a QT gamma problem.

The bigger question is, are you using Clipfinder as your final color correction? I think it is best to put out a nice flat image when you are sending qt or dpx files out for the color session, rather than assuming that clipfinder will get you a "final look".

David



Peace
Check out my new web series.
http://www.ripperhockey.com


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Uli Plank
Re: Clipfinder CC - diferent results
on Oct 17, 2009 at 7:35:04 am

I second this. If you output DPX in log 10 bit, there is actually no reason to correct at all, since the full quality is preserved. If you render to ProRes, it's good to make a first light in CF though, since you loose 2 bit. But it's definitely not the best tool to do a final grade.

The loupe is very close to final result in my experience, while the full window is QT based, shows all the flaws of QT gamma and doesn't observe new "color science".

Director of the Institute of Media Research (IMF) at Braunschweig University of Arts


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David Battistella
Re: Clipfinder CC - diferent results
on Oct 17, 2009 at 1:58:08 pm


Uli,

I am seconding your post. You have to respect the loupe and use the QT window as a "guide".

if you look at the jeans, and overall tonal quality of the loupe, I think they look much more accurate in the loupe than the QT window.

David

Russel is also right, a frame that includes the open QT window of a rendered file would be great!

David



Peace
Check out my new web series.
http://www.ripperhockey.com


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David Battistella
Re: Clipfinder CC - diferent results
on Oct 17, 2009 at 2:19:44 pm

Hey.

This is a test I did with on SNOW LEOPARD. I did not make any adjustments to the file. THis is how it came out of the RED. THis is also using build 20 with the new color science.

David



Peace
Check out my new web series.
http://www.ripperhockey.com


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Paul Flint
Re: Clipfinder CC - diferent results
on Oct 17, 2009 at 11:51:46 pm

Thanks guys for your feedback. I guess I will have to upgrade from Leopard to Snow Leopard to get that annoying gamma issue go away.
David - your pictures look exactly the same, great.

I am using Color for grading or if the director want to do CC on DaVinchi or Nucoda I output to DPX using monkeyextract, but that is done only to final edit material when I dont deal with hours of footage. "One Light" grade for edit is done in clipfinder. Its a bit faster that way for me.

As for settings when I output for final color grading I still do check them in redcine or clipfinder in order to have as much detail as I need since at that time I already know the direction the grade will go.


thanks again guys, and yes - that gamma shift in QT is a real pain

cheers
Paul Flint


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Paul Flint
Re: Clipfinder CC - diferent results
on Oct 18, 2009 at 12:06:04 pm

I did a bit of digging and it looks like there are still problems with quicktime in snow leopard

http://derek-lerner.com/blog/?p=1707



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Uli Plank
Re: Clipfinder CC - diferent results
on Oct 18, 2009 at 3:25:14 pm

Yes, there are. But you should be OK if you use the loupe for your first-light and render to ProRes.

Director of the Institute of Media Research (IMF) at Braunschweig University of Arts


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David Battistella
Re: Clipfinder CC - diferent results
on Oct 19, 2009 at 3:05:16 pm

[Uli Plank] "Yes, there are. But you should be OK if you use the loupe for your first-light and render to ProRes. "

I agree Uli. You just have to find the tendency once and then it seems to be OK. I try not to get to hung up on the onelights and I try to keep them very balanced.

David



Peace
Check out my new web series.
http://www.ripperhockey.com


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