[x265] [PATCH 1 of 3] Chroma QP Offset: increase chroma QP when psy-rd is enabled

[BugMaster]

On Wed, 25 Jun 2014 23:18:48 +0530, Deepthi Nandakumar wrote:
> They are. 
> encoder.c:x264_validate_parameters
> if( b_open && i_csp >= X264_CSP_I444 && i_csp < X264_CSP_BGR && h->param.analyse.b_psy )
>         h->param.analyse.i_chroma_qp_offset += 6;



> On Wed, Jun 25, 2014 at 11:12 PM, Derek Buitenhuis
> <derek.buitenhuis at gmail.com> wrote:
>   
> On 6/25/2014 3:45 PM, Deepthi Nandakumar wrote:
 >> In a sense, psy-rd encapsulates all those r-d algorithms/tweaks/hacks that improve visual quality but may hurt objective metrics like psnr/ssim.
 >> In 444, this qp hack is likely to hurt objective metrics, hence it's turned on only if psychovisual improvement is desired.
>  
>  OK.
>  
>  Was curious, since these are not lumped in with psy-rd in x264.
>  

That is separate --psy (--no-psy) option in x264 and not --psy-rd