[x265] Adaptive Quantization vs. different presets

[Steve Borho]

On Fri, Nov 8, 2013 at 1:41 AM, Mario *LigH* Rohkrämer <contact at ligh.de>wrote:

> I noticed that enabling Adaptive Quantization (--aq-mode 1) may or may not
> lead to visible artefacts. The dependencies are not yet certain. But a user
> in the doom9 forum (vood007) mentioned a relation to presets, as I reported
> artefacts with a command line not using any preset, but a clean result when
> using "--preset slower". This should probably be checked, as I suspect it
> to indicate possibly not correctly initialized options/variables in
> specific cases.


If 'slower' gives clean results, then the --rd setting is likely the
determining factor.  It's possible that AQ does not deal properly with
non-RDO quant.  It is an unfinished feature.

-- 
Steve Borho
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