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Old 11-14-2019, 11:52 AM   #1
xeberdee
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Default RGB Black levels in Primary Color Corrector

Hi,

It's been a while since I worked with Edius, and I really like the new Primary correction to access RGB curves, as it's much more accurate and very useful. So I'm testing to see what is going on with it.

I'm looking at a 16bit tiff file that has 1024 blocks from 0 to 1023 in a 10 bit environment.

If I import it at full range, I can from the timeline use the pipette to measure 1024 levels from the file. Great.

If I put say a Color Balance on it, then the pipette still show full range, but raising the brightness by 1 or 2 - gives a luminance of 4 or 8 on the scale (looks like the effect is working in 8bit) - although the first block is raised by some value, the next block is just one step higher - so I am not crushing the black level and the effect works almost like I want - even though it's not accurate in 10 bit.

However, if I use the Primary Color Correction tool, then the blacks get crushed automatically as it raises the legal range to 64 for the first 64 blocks. It is not possible to select 709 FULL, and the superwhite info is ignored. The luma values also work in 8 bit and raise by multiples of 4.

EDIT: OK found and read up on the Scene v. Base lights, and on closer inspection, the detail curve in the Primary Corrector does allow me to raise by software increments of 0.1 - and I can get 10 bit precision on all values Y,R,G,B. NICE BUT - a feature request would then be for 0.1 increments in the lift, gamma and other sliders in that tool also.

So even though this post is not about black levels in the PCC - I still have questions about the precision of the color tools.

What about other YUV effects? Which are accurate to 10 bits? Is it only the primary correction tool that is?
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Last edited by xeberdee; 11-14-2019 at 01:25 PM.
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Old 11-14-2019, 01:27 PM   #2
Andreas_Gumm
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I agree, it should be possible to set values on better precision.
And I also miss the availability of a standard profile "rec.709 FULL" or the possibility to switch between "white" or "superwhite".
Lasst recent version which gave us full access to the flag on all formats was Edius 6!

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Old 11-15-2019, 02:15 PM   #3
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Definitely EDIUS must grab all filters/effects together and move them to 10 or even 12 bits in feature.
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Old 11-15-2019, 02:27 PM   #4
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Most essential filters are working at 10 bit precision!
As far as I know 'Chrominance' filter is the only filter still working at 8 bit!
I agree about the clunky GUI interface and the raw scales hard to be set for high precision.
'Color Balance' filter is a very good example!

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Old 11-15-2019, 02:30 PM   #5
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Quote:
Originally Posted by Andreas_Gumm View Post
Most essential filters are working at 10 bit precision!
As far as I know 'Chrominance' filter is the only filter still working at 8 bit!
I agree about the clunky GUI interface and the raw scales hard to be set for high precision.
'Color Balance' filter is a very good example!

Andreas
Andreas, Color Matte also. If Edius was decide to RAW or Prores 4444 support then natural thing is to ask about 12,14 bit environment :)
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Old 11-15-2019, 02:44 PM   #6
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Quote:
Originally Posted by Seemedia View Post
Andreas, Color Matte also. If Edius was decide to RAW or Prores 4444 support then natural thing is to ask about 12,14 bit environment :)
Color Matte is not a filter and in real life not an issue to me since it doesn't harm other footage on timeline. It simply gives homogene color mattes! I don't use it much! But in terms of being consistent, it should be at highest precision.
4444 at 12 bit precision has always been of interest! But the mantra with regards to broadcast has limited the view.

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Old 11-15-2019, 02:48 PM   #7
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Yeah, true. I use Color Matte for gradient and half filter on 10 bit projects so... banding is visible.
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Old 11-15-2019, 02:56 PM   #8
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Quote:
Originally Posted by Seemedia View Post
Yeah, true. I use Color Matte for gradient and half filter on 10 bit projects so... banding is visible.
Ah, that makes sense! I totally agree!
I see sadly some of insoquently halfbaken thought feature sets in Edius.
E.g. GV tries to overcome QuickTime by providing all the different codecs natively. Very good intension!
So far so good, but 2-pass encoding is not provided which is needed to fullfill specific specifications of average bitrates at HIGHEST picture quality.
File size can't be estimated reliable, so bitrate limitations can't be used efficiently.

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Old 11-15-2019, 03:09 PM   #9
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Edius on the one hand gives cool new features. But on the other hand, we would like old things to be more polished. Well.... I would :)
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