On 6/26/2014 6:35 AM, BugMaster wrote:
That is separate --psy (--no-psy) option in x264 and not --psy-rd
Yeah, that was my point. :)
- Derek
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Ok, we dont have a separate psy option.yet
On Jun 26, 2014 6:00 PM, Derek Buitenhuis derek.buitenh...@gmail.com
wrote:
On 6/26/2014 6:35 AM, BugMaster wrote:
That is separate --psy (--no-psy) option in x264 and not --psy-rd
Yeah, that was my point. :)
- Derek
On 6/25/2014 1:22 AM, deep...@multicorewareinc.com wrote:
+/* In 444, chroma gets twice as much resolution, so halve quality when
psy-rd is enabled */
+if (p-internalCsp == X265_CSP_I444 p-psyRd)
+{
+p-cbQpOffset += 6;
+p-crQpOffset += 6;
+}
I dont really
This is primarily a visual quality improvement/psy-rd hack. In 444, since
chroma resolution is on par with luma, and our eyes arent very sensitive to
chroma, we increase the chroma QP so that those bits can be used up in
luma.
On Wed, Jun 25, 2014 at 4:35 PM, Derek Buitenhuis
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.
On Jun 25, 2014 7:02 PM,
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
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
# HG changeset patch
# User Deepthi Nandakumar deep...@multicorewareinc.com
# Date 1403605850 -19800
# Tue Jun 24 16:00:50 2014 +0530
# Node ID 812dc9f61549299e686e6e12c7c4770aad792eec
# Parent 18f936182df50cc5126d1707cd7c2b5fef289ccb
Chroma QP Offset: increase chroma QP when psy-rd is
