[x265] [PATCH] Introduce CLI/param options to control min and max VBV fullness
Aruna Matheswaran
aruna at multicorewareinc.com
Wed Sep 9 19:33:54 CEST 2020
>From a78f4895c8d20fd431a1427a72ea71508a171409 Mon Sep 17 00:00:00 2001
From: Aruna <aruna at multicorewareinc.com>
Date: Wed, 9 Sep 2020 22:43:42 +0530
Subject: [PATCH] Introduce CLI/param options to control min and max VBV
fullness
Signed-off-by: Aruna <aruna at multicorewareinc.com>
---
doc/reST/cli.rst | 24 +++++++++++++++++++++---
source/CMakeLists.txt | 2 +-
source/common/param.cpp | 14 ++++++++++++--
source/encoder/ratecontrol.cpp | 7 ++++---
source/x265.h | 7 +++++++
source/x265cli.cpp | 2 ++
source/x265cli.h | 2 ++
7 files changed, 49 insertions(+), 9 deletions(-)
diff --git a/doc/reST/cli.rst b/doc/reST/cli.rst
index 7777ee49e..1a1de9f50 100755
--- a/doc/reST/cli.rst
+++ b/doc/reST/cli.rst
@@ -1671,8 +1671,8 @@ Quality, rate control and rate distortion options
.. option:: --vbv-end <float>
- Final buffer emptiness. The portion of the decode buffer that must be
- available after all the specified frames have been inserted into the
+ Final buffer fullness. The portion of the decode buffer that must be
+ full after all the specified frames have been inserted into the
decode buffer. Specified as a fractional value between 0 and 1, or in
kbits. Default 0 (disabled)
@@ -1684,8 +1684,26 @@ Quality, rate control and rate distortion options
.. option:: --vbv-end-fr-adj <float>
Frame from which qp has to be adjusted to achieve final decode buffer
- emptiness. Specified as a fraction of the total frames. Fractions > 0 are
+ fullness. Specified as a fraction of the total frames. Fractions > 0 are
supported only when the total number of frames is known. Default 0.
+
+.. option:: --min-vbv-fullness <double>
+
+ Minimum VBV fullness percentage to be maintained. Specified as a
fractional
+ value ranging between 0 and 100. Default 50 i.e, Tries to keep the
buffer at least
+ 50% full at any point in time.
+
+ Decreasing the minimum required fullness shall improve the compression
efficiency,
+ but is expected to affect VBV conformance. Experimental option.
+
+.. option:: --max-vbv-fullness <double>
+
+ Maximum VBV fullness percentage to be maintained. Specified as a
fractional
+ value ranging between 0 and 100. Default 80 i.e Tries to keep the
buffer at max 80%
+ full at any point in time.
+
+ Increasing the minimum required fullness shall improve the compression
efficiency,
+ but is expected to affect VBV conformance. Experimental option.
.. option:: --qp, -q <integer>
diff --git a/source/CMakeLists.txt b/source/CMakeLists.txt
index 5738c861c..67e737512 100755
--- a/source/CMakeLists.txt
+++ b/source/CMakeLists.txt
@@ -29,7 +29,7 @@ option(NATIVE_BUILD "Target the build CPU" OFF)
option(STATIC_LINK_CRT "Statically link C runtime for release builds" OFF)
mark_as_advanced(FPROFILE_USE FPROFILE_GENERATE NATIVE_BUILD)
# X265_BUILD must be incremented each time the public API is changed
-set(X265_BUILD 197)
+set(X265_BUILD 198)
configure_file("${PROJECT_SOURCE_DIR}/x265.def.in"
"${PROJECT_BINARY_DIR}/x265.def")
configure_file("${PROJECT_SOURCE_DIR}/x265_config.h.in"
diff --git a/source/common/param.cpp b/source/common/param.cpp
index b3001fcf6..47a7a7c47 100755
--- a/source/common/param.cpp
+++ b/source/common/param.cpp
@@ -255,6 +255,8 @@ void x265_param_default(x265_param* param)
param->rc.vbvBufferInit = 0.9;
param->vbvBufferEnd = 0;
param->vbvEndFrameAdjust = 0;
+ param->minVbvFullness = 50;
+ param->maxVbvFullness = 80;
param->rc.rfConstant = 28;
param->rc.bitrate = 0;
param->rc.qCompress = 0.6;
@@ -1377,6 +1379,8 @@ int x265_param_parse(x265_param* p, const char* name,
const char* value)
p->bEnableHME = true;
}
OPT("vbv-live-multi-pass") p->bliveVBV2pass = atobool(value);
+ OPT("min-vbv-fullness") p->minVbvFullness = atof(value);
+ OPT("max-vbv-fullness") p->maxVbvFullness = atof(value);
else
return X265_PARAM_BAD_NAME;
}
@@ -1716,6 +1720,10 @@ int x265_check_params(x265_param* param)
"Valid vbv-end-fr-adj must be a fraction 0 - 1");
CHECK(!param->totalFrames && param->vbvEndFrameAdjust,
"vbv-end-fr-adj cannot be enabled when total number of frames is
unknown");
+ CHECK(param->minVbvFullness < 0 && param->minVbvFullness > 100,
+ "min-vbv-fullness must be a fraction 0 - 100");
+ CHECK(param->maxVbvFullness < 0 && param->maxVbvFullness > 100,
+ "max-vbv-fullness must be a fraction 0 - 100");
CHECK(param->rc.bitrate < 0,
"Target bitrate can not be less than zero");
CHECK(param->rc.qCompress < 0.5 || param->rc.qCompress > 1.0,
@@ -2142,8 +2150,8 @@ char *x265_param2string(x265_param* p, int padx, int
pady)
BOOL(p->rc.bEnableSlowFirstPass, "slow-firstpass");
if (p->rc.vbvBufferSize)
{
- s += sprintf(s, " vbv-maxrate=%d vbv-bufsize=%d vbv-init=%.1f",
- p->rc.vbvMaxBitrate, p->rc.vbvBufferSize,
p->rc.vbvBufferInit);
+ s += sprintf(s, " vbv-maxrate=%d vbv-bufsize=%d vbv-init=%.1f
min-vbv-fullness=%.1f max-vbv-fullness=%.1f",
+ p->rc.vbvMaxBitrate, p->rc.vbvBufferSize,
p->rc.vbvBufferInit, p->minVbvFullness, p->maxVbvFullness);
if (p->vbvBufferEnd)
s += sprintf(s, " vbv-end=%.1f vbv-end-fr-adj=%.1f",
p->vbvBufferEnd, p->vbvEndFrameAdjust);
if (p->rc.rateControlMode == X265_RC_CRF)
@@ -2452,6 +2460,8 @@ void x265_copy_params(x265_param* dst, x265_param*
src)
dst->rc.vbvMaxBitrate = src->rc.vbvMaxBitrate;
dst->rc.vbvBufferInit = src->rc.vbvBufferInit;
+ dst->minVbvFullness = src->minVbvFullness;
+ dst->maxVbvFullness = src->maxVbvFullness;
dst->rc.cuTree = src->rc.cuTree;
dst->rc.rfConstantMax = src->rc.rfConstantMax;
dst->rc.rfConstantMin = src->rc.rfConstantMin;
diff --git a/source/encoder/ratecontrol.cpp b/source/encoder/ratecontrol.cpp
index 8e9187e8a..4e7d52419 100644
--- a/source/encoder/ratecontrol.cpp
+++ b/source/encoder/ratecontrol.cpp
@@ -2380,7 +2380,7 @@ double RateControl::clipQscale(Frame* curFrame,
RateControlEntry* rce, double q)
{
finalDur = x265_clip3(0.4, 1.0, totalDuration);
}
- targetFill = X265_MIN(m_bufferFill + totalDuration *
m_vbvMaxRate * 0.5, m_bufferSize * (1 - 0.5 * finalDur));
+ targetFill = X265_MIN(m_bufferFill + totalDuration *
m_vbvMaxRate * 0.5, m_bufferSize * ((m_param->minVbvFullness / 100) *
finalDur));
if (bufferFillCur < targetFill)
{
q *= 1.01;
@@ -2388,7 +2388,8 @@ double RateControl::clipQscale(Frame* curFrame,
RateControlEntry* rce, double q)
continue;
}
/* Try to get the buffer not more than 80% filled, but
don't set an impossible goal. */
- targetFill = x265_clip3(m_bufferSize * (1 - 0.2 *
finalDur), m_bufferSize, m_bufferFill - totalDuration * m_vbvMaxRate * 0.5);
+
+ targetFill = x265_clip3(m_bufferSize *
((m_param->maxVbvFullness / 100) * finalDur), m_bufferSize, m_bufferFill -
totalDuration * m_vbvMaxRate * 0.5);
if ((m_isCbr || m_2pass) && bufferFillCur > targetFill
&& !m_isSceneTransition)
{
q /= 1.01;
@@ -2405,7 +2406,7 @@ double RateControl::clipQscale(Frame* curFrame,
RateControlEntry* rce, double q)
/* Fallback to old purely-reactive algorithm: no lookahead. */
if ((m_sliceType == P_SLICE || m_sliceType == B_SLICE ||
(m_sliceType == I_SLICE && m_lastNonBPictType ==
I_SLICE)) &&
- m_bufferFill / m_bufferSize < 0.5)
+ m_bufferFill / m_bufferSize < (m_param->minVbvFullness /
100))
{
q /= x265_clip3(0.5, 1.0, 2.0 * m_bufferFill /
m_bufferSize);
}
diff --git a/source/x265.h b/source/x265.h
index 3fc464f6d..f44040ba7 100644
--- a/source/x265.h
+++ b/source/x265.h
@@ -1925,6 +1925,13 @@ typedef struct x265_param
control 2 pass. Experimental.Default is disabled*/
int bliveVBV2pass;
+ /* Minimum VBV fullness to be maintained. Default 50. Keep the buffer
+ * at least 50% full */
+ double minVbvFullness;
+
+ /* Maximum VBV fullness to be maintained. Default 80. Keep the buffer
+ * at max 80% full */
+ double maxVbvFullness;
} x265_param;
/* x265_param_alloc:
diff --git a/source/x265cli.cpp b/source/x265cli.cpp
index 0cf2d815c..c28dd7f8c 100755
--- a/source/x265cli.cpp
+++ b/source/x265cli.cpp
@@ -212,6 +212,8 @@ namespace X265_NS {
H0(" --vbv-bufsize <integer> Set size of the VBV buffer
(kbit). Default %d\n", param->rc.vbvBufferSize);
H0(" --vbv-init <float> Initial VBV buffer occupancy
(fraction of bufsize or in kbits). Default %.2f\n",
param->rc.vbvBufferInit);
H0(" --vbv-end <float> Final VBV buffer emptiness
(fraction of bufsize or in kbits). Default 0 (disabled)\n");
+ H0(" --min-vbv-fullness <double> Minimum VBV fullness
percentage to be maintained. Default %.2f\n", param->minVbvFullness);
+ H0(" --max-vbv-fullness <double> Maximum VBV fullness
percentage to be maintained. Default %.2f\n", param->maxVbvFullness);
H0(" --vbv-end-fr-adj <float> Frame from which qp has to be
adjusted to achieve final decode buffer emptiness. Default 0\n");
H0(" --chunk-start <integer> First frame of the chunk.
Default 0 (disabled)\n");
H0(" --chunk-end <integer> Last frame of the chunk.
Default 0 (disabled)\n");
diff --git a/source/x265cli.h b/source/x265cli.h
index 3e2fd5e6d..a24d25435 100644
--- a/source/x265cli.h
+++ b/source/x265cli.h
@@ -376,6 +376,8 @@ static const struct option long_options[] =
{ "no-cll", no_argument, NULL, 0 },
{ "hme-range", required_argument, NULL, 0 },
{ "abr-ladder", required_argument, NULL, 0 },
+ { "min-vbv-fullness", required_argument, NULL, 0 },
+ { "max-vbv-fullness", required_argument, NULL, 0 },
{ 0, 0, 0, 0 },
{ 0, 0, 0, 0 },
{ 0, 0, 0, 0 },
--
2.20.1.windows.1
On Wed, Sep 9, 2020 at 11:02 PM Aruna Matheswaran <
aruna at multicorewareinc.com> wrote:
>
>
> On Mon, Sep 7, 2020 at 10:33 AM Gopi Satykrishna Akisetty <
> gopi.satykrishna at multicorewareinc.com> wrote:
>
>>
>>
>> On Tue, Sep 1, 2020 at 8:41 PM Aruna Matheswaran <
>> aruna at multicorewareinc.com> wrote:
>>
>>> From 672d4b53dd35ea4b847ae3177403f526f74cda4e Mon Sep 17 00:00:00 2001
>>> From: Aruna <aruna at multicorewareinc.com>
>>> Date: Tue, 1 Sep 2020 19:59:17 +0530
>>> Subject: [PATCH] Introduce CLI/param options to control min and max VBV
>>> fullness
>>>
>>> ---
>>> doc/reST/cli.rst | 18 +++++++++++++++---
>>> source/CMakeLists.txt | 2 +-
>>> source/common/param.cpp | 14 ++++++++++++--
>>> source/encoder/ratecontrol.cpp | 4 ++--
>>> source/x265.h | 8 ++++++++
>>> source/x265cli.h | 2 ++
>>> 6 files changed, 40 insertions(+), 8 deletions(-)
>>>
>>> diff --git a/doc/reST/cli.rst b/doc/reST/cli.rst
>>> index 02828e390..18ca17d35 100644
>>> --- a/doc/reST/cli.rst
>>> +++ b/doc/reST/cli.rst
>>> @@ -1671,8 +1671,8 @@ Quality, rate control and rate distortion options
>>>
>>> .. option:: --vbv-end <float>
>>>
>>> - Final buffer emptiness. The portion of the decode buffer that must be
>>> - available after all the specified frames have been inserted into the
>>> + Final buffer fullness. The portion of the decode buffer that must be
>>> + full after all the specified frames have been inserted into the
>>> decode buffer. Specified as a fractional value between 0 and 1, or in
>>> kbits. Default 0 (disabled)
>>>
>>> @@ -1684,8 +1684,20 @@ Quality, rate control and rate distortion options
>>> .. option:: --vbv-end-fr-adj <float>
>>>
>>> Frame from which qp has to be adjusted to achieve final decode buffer
>>> - emptiness. Specified as a fraction of the total frames. Fractions > 0
>>> are
>>> + fullness. Specified as a fraction of the total frames. Fractions > 0
>>> are
>>> supported only when the total number of frames is known. Default 0.
>>> +
>>> +.. option:: --min-vbv-fullness <double>
>>> +
>>> + Minimum VBV fullness percentage to be maintained. Specified as a
>>> fractional
>>> + value ranging between 0 and 100. Default 50 i.e, Tries to keep the
>>> buffer at least
>>> + 50% full at any point in time.
>>> +
>>> +.. option:: --max-vbv-fullness <double>
>>> +
>>> + Maximum VBV fullness percentage to be maintained. Specified as a
>>> fractional
>>> + value ranging between 0 and 100. Default 80 i.e Tries to keep the
>>> buffer at max 80%
>>> + full at any point in time.
>>>
>>> .. option:: --qp, -q <integer>
>>>
>>> diff --git a/source/CMakeLists.txt b/source/CMakeLists.txt
>>> index 1d1f8cacf..d9ed3983e 100644
>>> --- a/source/CMakeLists.txt
>>> +++ b/source/CMakeLists.txt
>>> @@ -29,7 +29,7 @@ option(NATIVE_BUILD "Target the build CPU" OFF)
>>> option(STATIC_LINK_CRT "Statically link C runtime for release builds"
>>> OFF)
>>> mark_as_advanced(FPROFILE_USE FPROFILE_GENERATE NATIVE_BUILD)
>>> # X265_BUILD must be incremented each time the public API is changed
>>> -set(X265_BUILD 195)
>>> +set(X265_BUILD 196)
>>> configure_file("${PROJECT_SOURCE_DIR}/x265.def.in"
>>> "${PROJECT_BINARY_DIR}/x265.def")
>>> configure_file("${PROJECT_SOURCE_DIR}/x265_config.h.in"
>>> diff --git a/source/common/param.cpp b/source/common/param.cpp
>>> index 240568445..f356074a4 100644
>>> --- a/source/common/param.cpp
>>> +++ b/source/common/param.cpp
>>> @@ -255,6 +255,8 @@ void x265_param_default(x265_param* param)
>>> param->rc.vbvBufferInit = 0.9;
>>> param->vbvBufferEnd = 0;
>>> param->vbvEndFrameAdjust = 0;
>>> + param->minVbvFullness = 50;
>>> + param->maxVbvFullness = 80;
>>> param->rc.rfConstant = 28;
>>> param->rc.bitrate = 0;
>>> param->rc.qCompress = 0.6;
>>> @@ -1375,6 +1377,8 @@ int x265_param_parse(x265_param* p, const char*
>>> name, const char* value)
>>> sscanf(value, "%d,%d,%d", &p->hmeRange[0], &p->hmeRange[1],
>>> &p->hmeRange[2]);
>>> p->bEnableHME = true;
>>> }
>>> + OPT("min-vbv-fullness") p->minVbvFullness = atof(value);
>>> + OPT("max-vbv-fullness") p->maxVbvFullness = atof(value);
>>> else
>>> return X265_PARAM_BAD_NAME;
>>> }
>>> @@ -1714,6 +1718,10 @@ int x265_check_params(x265_param* param)
>>> "Valid vbv-end-fr-adj must be a fraction 0 - 1");
>>> CHECK(!param->totalFrames && param->vbvEndFrameAdjust,
>>> "vbv-end-fr-adj cannot be enabled when total number of frames
>>> is unknown");
>>> + CHECK(param->minVbvFullness < 0 && param->minVbvFullness > 100,
>>> + "min-vbv-fullness must be a fraction 0 - 100");
>>> + CHECK(param->maxVbvFullness < 0 && param->maxVbvFullness > 100,
>>> + "max-vbv-fullness must be a fraction 0 - 100");
>>> CHECK(param->rc.bitrate < 0,
>>> "Target bitrate can not be less than zero");
>>> CHECK(param->rc.qCompress < 0.5 || param->rc.qCompress > 1.0,
>>> @@ -2127,8 +2135,8 @@ char *x265_param2string(x265_param* p, int padx,
>>> int pady)
>>> BOOL(p->rc.bEnableSlowFirstPass, "slow-firstpass");
>>> if (p->rc.vbvBufferSize)
>>> {
>>> - s += sprintf(s, " vbv-maxrate=%d vbv-bufsize=%d
>>> vbv-init=%.1f",
>>> - p->rc.vbvMaxBitrate, p->rc.vbvBufferSize,
>>> p->rc.vbvBufferInit);
>>> + s += sprintf(s, " vbv-maxrate=%d vbv-bufsize=%d
>>> vbv-init=%.1f min-vbv-fullness=%.1f max-vbv-fullness=%.1f",
>>> + p->rc.vbvMaxBitrate, p->rc.vbvBufferSize,
>>> p->rc.vbvBufferInit, p->minVbvFullness, p->maxVbvFullness);
>>> if (p->vbvBufferEnd)
>>> s += sprintf(s, " vbv-end=%.1f vbv-end-fr-adj=%.1f",
>>> p->vbvBufferEnd, p->vbvEndFrameAdjust);
>>> if (p->rc.rateControlMode == X265_RC_CRF)
>>> @@ -2436,6 +2444,8 @@ void x265_copy_params(x265_param* dst, x265_param*
>>> src)
>>> dst->rc.vbvMaxBitrate = src->rc.vbvMaxBitrate;
>>>
>>> dst->rc.vbvBufferInit = src->rc.vbvBufferInit;
>>> + dst->minVbvFullness = src->minVbvFullness;
>>> + dst->maxVbvFullness = src->maxVbvFullness;
>>> dst->rc.cuTree = src->rc.cuTree;
>>> dst->rc.rfConstantMax = src->rc.rfConstantMax;
>>> dst->rc.rfConstantMin = src->rc.rfConstantMin;
>>> diff --git a/source/encoder/ratecontrol.cpp
>>> b/source/encoder/ratecontrol.cpp
>>> index 82d7c4f2a..0e0845a85 100644
>>> --- a/source/encoder/ratecontrol.cpp
>>> +++ b/source/encoder/ratecontrol.cpp
>>> @@ -2370,7 +2370,7 @@ double RateControl::clipQscale(Frame* curFrame,
>>> RateControlEntry* rce, double q)
>>> {
>>> finalDur = x265_clip3(0.4, 1.0, totalDuration);
>>> }
>>> - targetFill = X265_MIN(m_bufferFill + totalDuration
>>> * m_vbvMaxRate * 0.5, m_bufferSize * (1 - 0.5 * finalDur));
>>> + targetFill = X265_MIN(m_bufferFill + totalDuration
>>> * m_vbvMaxRate * 0.5, m_bufferSize * ((m_param->minVbvFullness / 100) *
>>> finalDur));
>>> if (bufferFillCur < targetFill)
>>> {
>>> q *= 1.01;
>>> @@ -2378,7 +2378,7 @@ double RateControl::clipQscale(Frame* curFrame,
>>> RateControlEntry* rce, double q)
>>> continue;
>>> }
>>> /* Try to get the buffer not more than 80% filled,
>>> but don't set an impossible goal. */
>>> - targetFill = x265_clip3(m_bufferSize * (1 - 0.2 *
>>> finalDur), m_bufferSize, m_bufferFill - totalDuration * m_vbvMaxRate * 0.5);
>>> + targetFill = x265_clip3(m_bufferSize *
>>> ((m_param->maxVbvFullness / 100) * finalDur), m_bufferSize, m_bufferFill -
>>> totalDuration * m_vbvMaxRate * 0.5);
>>> if (m_isCbr && bufferFillCur > targetFill &&
>>> !m_isSceneTransition)
>>> {
>>> q /= 1.01;
>>>
>> in the else part below (Fallback to old purely-reactive algorithm: no
>> lookahead),
>> Should the m_bufferFill / m_bufferSize < 0.5 be changed to m_bufferFill /
>> m_bufferSize < m_param->minVbvFullness /100 ??
>>
> [AM] Didn't update this section as the focus was mainly on lookahead based
> VBV. I shall update this section as well.
>
>> diff --git a/source/x265.h b/source/x265.h
>>> index 0ffa600b0..46024db37 100644
>>> --- a/source/x265.h
>>> +++ b/source/x265.h
>>> @@ -1920,6 +1920,14 @@ typedef struct x265_param
>>>
>>> /* Maxrate that could be signaled to the decoder. Default 0. API
>>> only. */
>>> int decoderVbvMaxRate;
>>> +
>>> + /* Minimum VBV fullness to be maintained. Default 50. Keep the
>>> buffer
>>> + * at least 50% full */
>>> + double minVbvFullness;
>>> +
>>> + /* Maximum VBV fullness to be maintained. Default 80. Keep the
>>> buffer
>>> + * at max 80% full */
>>> + double maxVbvFullness;
>>> } x265_param;
>>>
>>> /* x265_param_alloc:
>>> diff --git a/source/x265cli.h b/source/x265cli.h
>>> index 311f06935..b7bdd0c2d 100644
>>> --- a/source/x265cli.h
>>> +++ b/source/x265cli.h
>>> @@ -374,6 +374,8 @@ static const struct option long_options[] =
>>> { "no-cll", no_argument, NULL, 0 },
>>> { "hme-range", required_argument, NULL, 0 },
>>> { "abr-ladder", required_argument, NULL, 0 },
>>> + { "min-vbv-fullness", required_argument, NULL, 0 },
>>> + { "max-vbv-fullness", required_argument, NULL, 0 },
>>> { 0, 0, 0, 0 },
>>> { 0, 0, 0, 0 },
>>> { 0, 0, 0, 0 },
>>>
>> I don't see help options for the new cli's. Can you add them to the patch.
>>
> [AM] ok, will add.
>
>>
>>
>>> --
>>> --
>>> Regards,
>>> *Aruna Matheswaran,*
>>> Video Codec Engineer,
>>> Media & AI analytics BU,
>>>
>>>
>>>
>>> _______________________________________________
>>> x265-devel mailing list
>>> x265-devel at videolan.org
>>> https://mailman.videolan.org/listinfo/x265-devel
>>>
>> _______________________________________________
>> x265-devel mailing list
>> x265-devel at videolan.org
>> https://mailman.videolan.org/listinfo/x265-devel
>>
>
>
> --
> Regards,
> *Aruna Matheswaran,*
> Video Codec Engineer,
> Media & AI analytics BU,
>
>
>
>
--
Regards,
*Aruna Matheswaran,*
Video Codec Engineer,
Media & AI analytics BU,
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