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Old 27th January 2020, 20:20   #21  |  Link
benwaggoner
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Quote:
Originally Posted by Atak_Snajpera View Post
My theory is that uhd movies are simply cleaner(denoised by default)
Alas, far from true...
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Old 28th January 2020, 15:19   #22  |  Link
blublub
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Hi

Ok I did a couple of picture by picture comparisons after extraction frames via Virtualdub.

aq-mode=2 does reduce noise and smooths the image compared to AQ1, that is why AQ1 uses more bitrate at a given CRF.
It was more noticeably in backgrounds than in foreground object (i.e. faces). I am not certainif one can see it while playing the movie.

Nevertheless since I want a high quality encode I will go with aq1 for now.
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Old 29th January 2020, 17:07   #23  |  Link
benwaggoner
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Originally Posted by blublub View Post
Hi

Ok I did a couple of picture by picture comparisons after extraction frames via Virtualdub.

aq-mode=2 does reduce noise and smooths the image compared to AQ1, that is why AQ1 uses more bitrate at a given CRF.
It was more noticeably in backgrounds than in foreground object (i.e. faces). I am not certainif one can see it while playing the movie.

Nevertheless since I want a high quality encode I will go with aq1 for now.
Have you tried the new --aq-mode 4?
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Old 29th January 2020, 17:10   #24  |  Link
blublub
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No.

What is that all about?
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Old 29th January 2020, 23:44   #25  |  Link
benwaggoner
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Originally Posted by blublub View Post
What is that all about?
Code:
--aq-mode <0|1|2|3|4>
Adaptive Quantization operating mode. Raise or lower per-block quantization based on complexity analysis of the source image.
The more complex the block, the more quantization is used. 
This offsets the tendency of the encoder to spend too many bits on complex areas and not enough in flat areas.
0: disabled
1: AQ enabled
2: AQ enabled with auto-variance (default)
3: AQ enabled with auto-variance and bias to dark scenes
4: AQ enabled with auto-variance and edge information
So, aq-mode 2 plus edge information.
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Old 30th January 2020, 10:48   #26  |  Link
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K, thx. I guess I'll pass on aq 4 testing for now and stick to aq1
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Old 30th January 2020, 22:29   #27  |  Link
Blue_MiSfit
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Ben, what's your go-to AQ mode for HDR vs SDR content these days?
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