[x265] [PATCH] rc: fix rate factor values recorded in csv
Aarthi Priya Thirumalai
aarthi at multicorewareinc.com
Sat Dec 12 07:55:25 CET 2015
CRF is right now printed as a RateFactor value that is used internally in
the calculation of Rate Control, that is not in the same scale as the user
inputs. We are changing the crf printed in teh csv to reflect the scale of
(0-51) -> what the user selects in the cli.
In case of VBV changing the qp from whatever is decided for the given CRF,
we recompute the CRF corresponding to the updated qp at the end and print
it out. Similarly, for 2 pass when qp is changed from 1st pass, we
recompute the CRF and print it out in the csv.
On Fri, Dec 11, 2015 at 8:25 PM, Deepthi Nandakumar <
deepthi at multicorewareinc.com> wrote:
> Thanks Aarthi. Can you quickly jog my memory on what we discussed about
> CRF calculations?
>
> On Fri, Dec 11, 2015 at 8:17 PM, Aarthi Priya Thirumalai <
> aarthi at multicorewareinc.com> wrote:
>
>> # HG changeset patch
>> # User Aarthi Priya Thirumalai <aarthi at multicorewareinc.com>
>> # Date 1449763621 -19800
>> # Thu Dec 10 21:37:01 2015 +0530
>> # Node ID c401ace41d5d8d2eef8f82d625465de7f9b47b0e
>> # Parent d72c79721e88cbd6e471d50351b46111918871ba
>> rc: fix rate factor values recorded in csv
>>
>> diff -r d72c79721e88 -r c401ace41d5d source/encoder/ratecontrol.cpp
>> --- a/source/encoder/ratecontrol.cpp Thu Dec 10 10:07:17 2015 +0530
>> +++ b/source/encoder/ratecontrol.cpp Thu Dec 10 21:37:01 2015 +0530
>> @@ -144,6 +144,7 @@
>> rce->sliceType = rce2Pass->sliceType;
>> rce->qpNoVbv = rce2Pass->qpNoVbv;
>> rce->newQp = rce2Pass->newQp;
>> + rce->qRceq = rce2Pass->qRceq;
>> }
>> } // end anonymous namespace
>> /* Returns the zone for the current frame */
>> @@ -517,7 +518,7 @@
>> char picType;
>> int e;
>> char *next;
>> - double qpRc, qpAq, qNoVbv;
>> + double qpRc, qpAq, qNoVbv, qRceq;
>> next = strstr(p, ";");
>> if (next)
>> *next++ = 0;
>> @@ -529,8 +530,8 @@
>> }
>> rce = &m_rce2Pass[encodeOrder];
>> m_encOrder[frameNumber] = encodeOrder;
>> - e += sscanf(p, " in:%*d out:%*d type:%c q:%lf q-aq:%lf
>> q-noVbv:%lf tex:%d mv:%d misc:%d icu:%lf pcu:%lf scu:%lf",
>> - &picType, &qpRc, &qpAq, &qNoVbv, &rce->coeffBits,
>> + e += sscanf(p, " in:%*d out:%*d type:%c q:%lf q-aq:%lf
>> q-noVbv:%lf q-Rceq:%lf tex:%d mv:%d misc:%d icu:%lf pcu:%lf scu:%lf",
>> + &picType, &qpRc, &qpAq, &qNoVbv, &qRceq,
>> &rce->coeffBits,
>> &rce->mvBits, &rce->miscBits, &rce->iCuCount,
>> &rce->pCuCount,
>> &rce->skipCuCount);
>> rce->keptAsRef = true;
>> @@ -554,6 +555,7 @@
>> rce->qpNoVbv = qNoVbv;
>> rce->qpaRc = qpRc;
>> rce->qpAq = qpAq;
>> + rce->qRceq = qRceq;
>> p = next;
>> }
>> X265_FREE(statsBuf);
>> @@ -1142,6 +1144,7 @@
>> }
>> if (!m_isAbr && m_2pass && m_param->rc.rateControlMode ==
>> X265_RC_CRF)
>> {
>> + rce->qpPrev = x265_qScale2qp(rce->qScale);
>> rce->qScale = rce->newQScale;
>> rce->qpaRc = curEncData.m_avgQpRc = curEncData.m_avgQpAq =
>> x265_qScale2qp(rce->newQScale);
>> m_qp = int(rce->qpaRc + 0.5);
>> @@ -2347,20 +2350,31 @@
>> {
>> if (m_param->rc.rateControlMode == X265_RC_ABR &&
>> !m_param->rc.bStatRead)
>> checkAndResetABR(rce, true);
>> -
>> - if (m_param->rc.rateControlMode == X265_RC_CRF)
>> + }
>> + if (m_param->rc.rateControlMode == X265_RC_CRF)
>> + {
>> + double crfVal, qpRef = curEncData.m_avgQpRc;
>> + bool is2passCrfChange = false;
>> + if (m_2pass)
>> {
>> - if (int(curEncData.m_avgQpRc + 0.5) == slice->m_sliceQp)
>> - curEncData.m_rateFactor = m_rateFactorConstant;
>> - else
>> + if (abs(curEncData.m_avgQpRc - rce->qpPrev) > 0.1)
>> {
>> - /* If vbv changed the frame QP recalculate the
>> rate-factor */
>> - double baseCplx = m_ncu * (m_param->bframes ? 120 : 80);
>> - double mbtree_offset = m_param->rc.cuTree ? (1.0 -
>> m_param->rc.qCompress) * 13.5 : 0;
>> - curEncData.m_rateFactor = pow(baseCplx, 1 - m_qCompress)
>> /
>> - x265_qp2qScale(int(curEncData.m_avgQpRc + 0.5) +
>> mbtree_offset);
>> + qpRef = rce->qpPrev;
>> + is2passCrfChange = true;
>> }
>> }
>> + if (is2passCrfChange || abs(qpRef - rce->qpNoVbv) > 0.5)
>> + {
>> + double crfFactor = rce->qRceq /x265_qp2qScale(qpRef);
>> + double baseCplx = m_ncu * (m_param->bframes ? 120 : 80);
>> + double mbtree_offset = m_param->rc.cuTree ? (1.0 -
>> m_param->rc.qCompress) * 13.5 : 0;
>> + crfVal = x265_qScale2qp(pow(baseCplx, 1 - m_qCompress) /
>> crfFactor) - mbtree_offset;
>> + }
>> + else
>> + crfVal = rce->sliceType == I_SLICE ? m_param->rc.rfConstant
>> - m_ipOffset :
>> + (rce->sliceType == B_SLICE ? m_param->rc.rfConstant +
>> m_pbOffset : m_param->rc.rfConstant);
>> +
>> + curEncData.m_rateFactor = crfVal;
>> }
>>
>> if (m_isAbr && !m_isAbrReset)
>> @@ -2454,10 +2468,10 @@
>> : rce->sliceType == P_SLICE ? 'P'
>> : IS_REFERENCED(curFrame) ? 'B' : 'b';
>> if (fprintf(m_statFileOut,
>> - "in:%d out:%d type:%c q:%.2f q-aq:%.2f q-noVbv:%.2f
>> tex:%d mv:%d misc:%d icu:%.2f pcu:%.2f scu:%.2f ;\n",
>> + "in:%d out:%d type:%c q:%.2f q-aq:%.2f q-noVbv:%.2f
>> q-Rceq:%.2f tex:%d mv:%d misc:%d icu:%.2f pcu:%.2f scu:%.2f ;\n",
>> rce->poc, rce->encodeOrder,
>> cType, curEncData.m_avgQpRc, curEncData.m_avgQpAq,
>> - rce->qpNoVbv,
>> + rce->qpNoVbv, rce->qRceq,
>> curFrame->m_encData->m_frameStats.coeffBits,
>> curFrame->m_encData->m_frameStats.mvBits,
>> curFrame->m_encData->m_frameStats.miscBits,
>> diff -r d72c79721e88 -r c401ace41d5d source/encoder/ratecontrol.h
>> --- a/source/encoder/ratecontrol.h Thu Dec 10 10:07:17 2015 +0530
>> +++ b/source/encoder/ratecontrol.h Thu Dec 10 21:37:01 2015 +0530
>> @@ -75,6 +75,7 @@
>> double qpaRc;
>> double qpAq;
>> double qRceq;
>> + double qpPrev;
>> double frameSizePlanned; /* frame Size decided by RateCotrol
>> before encoding the frame */
>> double bufferRate;
>> double movingAvgSum;
>> _______________________________________________
>> x265-devel mailing list
>> x265-devel at videolan.org
>> https://mailman.videolan.org/listinfo/x265-devel
>>
>
>
>
> --
> Deepthi Nandakumar
> Engineering Manager, x265
> Multicoreware, Inc
>
> _______________________________________________
> x265-devel mailing list
> x265-devel at videolan.org
> https://mailman.videolan.org/listinfo/x265-devel
>
>
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