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Three Way Color Corrector Issues

Dec 28, 2012 7:37 PM

I have been having problmes with the three way color corrector relating to the input and output levels and even just having the effect active on a clip.

 

Here is what I have with no adjustment and with the effect is active.

 

No Adjustment_1.jpgNo Adjustment_2.jpgNo Adjustment_3.jpg

 

 

 

     When I move the black input level to the max of 253 it darkens the image but doesn't give me any complete blacks.  In the waveform monitor the lowest IRE levels are around 10.

 

Highest Black Input_1.jpgHighest Black Input_2.jpgHighest Black Input_3.jpg

 

 

 

     When I move the black output level to its max there is also not a large enough change to the image. With this I should have blown out whites.  The highest IRE level in the waveform monitor is only about 90.

 

Highest Black Output_1.jpgHighest Black Output_2.jpgHighest Black Output_3.jpg

 

 

When I bring the output white level to its minimum there is also a very similar issue to the other two scenarios.  The minimum IRE level is about 10 in this case.

 

Min White Output_1.jpgMin White Output_2.jpgMin White Output_3.jpg

 

I tried all these same things on the Fast Color Corrector and had no problems.

 

I haven't noticed any issues with the input white level and the input grey level on the Three Way Color Corrector.

 

 

The last problem I found with the Three Way Color Corrector is related to just having the effect active even when no adjustments to the Three Way Color Corrector are made.  This issue doesn't happen when Render at Maximum Bit Depth is enabled.  The image gets a greenish tint to it and the problem is also seen in the RGB parade monitor as a slight decrease in blues and reds.

 

Here is with the effect disabled on the left and enabled on the right.

 

Comparison_1.jpg

Comparison_2.jpg

 

 

 

Here are some basic system specs:

 

HP 8710p Mobile Workstation

 

CPU: Intel Core Duo 2 T7500 @2.2 GHz

 

GPU: NVIDIA Quadro NVS 320m

 

4 Gb RAM

 

750Gb Seagate Monentus XT

 

OS: Windows 7 64 Bit Ultimate

 

I am using the Mecury Playback Engine in software only mode because my GPU is not supported and also lacking memory to use the hack.

The footage is H.264 encoded in a .mov container and was shot on a Canon 650d.

I tried the same tests using NTSC DV footage shot on an old Panasonic PV-DV910 and had the same problems.

 

For now I will be using the Fast Color Corrector for my work since I haven't had any of these issues with it.

 

Has anyone else had problems with the Three Way Color Corrector and found a solution? I hope Adobe comes out with a fix for this soon.

 

 

Edit:  The problems relating to adjusting levels occur with Maximum Bit Depth both diabled and enabled

543 Views   6 Replies   Latest reply: Hewlet_Zar, Jan 9, 2013 2:51 AM
 
Replies
  • Jim Simon
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    1. Jim Simon,
    Dec 28, 2012 8:08 PM   in reply to Video_Editor_2000
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    I've noticed the same issues and am using the same solution.

     
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  • Ann Bens
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    2. Ann Bens,
    Dec 29, 2012 2:35 AM   in reply to Jim Simon
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    Try the RGB color corrector.

    Lower the Gamma then push the Gain.

     
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  • Hewlet_Zar
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    3. Hewlet_Zar,
    Dec 29, 2012 3:48 AM   in reply to Video_Editor_2000
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    The last problem I found with the Three Way Color Corrector is related to just having the effect active even when no adjustments to the Three Way Color Corrector are made. The image gets a greenish tint to it and the problem is also seen in the RGB parade monitor as a slight decrease in blues and reds.

     

    ...and the same problem with Color Balance, Change to Color, Brightness & Contrast, etc.

    And what really hurts is that this happens even with some of the most important plugins: Colorista II/MBLooks and Twixtor. Just having the effect/plugin activ with no adjustment the image gets a very strange greenish tint. Steve Hoeg pointed out the problem: "converting from YUV Rec. 709 of the source files to YUV Rec. 601 as these particular effects required".

     

    Unfortunately the bug has been fixed only for Fast Color Corrector, RGB Curves and a few others, nothing more.

    More details on this issue can be found at the following links:

     

    http://forums.adobe.com/message/4157892#4157892

    http://forums.adobe.com/message/4395545#4395545

    http://forums.adobe.com/message/4840488#4840488

     
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  • Video_Editor_2000
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    4. Video_Editor_2000,
    Dec 29, 2012 7:45 PM   in reply to Ann Bens
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    I tried the RGB color corrector but had a problem with it.

     

    The effect wouldn't make any changes to the video and when I moved the playhead it would not go to the next frame until I disabled the effect.  When I hit play the image would stay frozen on one frame but I would still get audio and the playhead would move.  When I hit stop it would still stay frozen on the same frame. 

     

    Anyone else have this issue?

     
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  • Video_Editor_2000
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    5. Video_Editor_2000,
    Dec 29, 2012 7:47 PM   in reply to Hewlet_Zar
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    Hewlet, Did you have problems with the input and output levels on the Three Way Color Corrector too or just with it giving the image a greenish tint?

     
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  • Hewlet_Zar
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    6. Hewlet_Zar,
    Jan 9, 2013 2:51 AM   in reply to Video_Editor_2000
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    No, I don't have problems with the input/output levels.

    The problem is only with this damn greenish tint when I use some tools/effects/plugins to make a color correction. It's really very painful when you try to make a good/decent/professional color correction with this greenish tint that appears in the preview, because it always gives you the feeling that you have to reduce the green shadows curves when in fact it's not necessary.

     

    Anyway, I am surprised that the Adobe team has been able to fix this bug for some of the tools/effects, but not for the rest and for the most important plugins: Colorista II/MBLooks and Twixtor. We have noted that any tool/plugin that doesn't have the "YUV" sign gives problems.

    PP-bug.png

     
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