[x265] [PATCH] presets: Updating presets to improve coding efficiency and speed

Pradeep Ramachandran pradeep at multicorewareinc.com
Tue Dec 22 04:35:30 CET 2015


Ok thanks - will fix and resend.
Pradeep.

On Tue, Dec 22, 2015 at 7:38 AM, Deepthi Nandakumar <
deepthi at multicorewareinc.com> wrote:

> Yes, you're right, Tom. Also this patch will not apply at the current tip,
> since Tom committed a patch to presets.rst yesterday.
>
> On Tue, Dec 22, 2015 at 7:30 AM, Tom Vaughan <
> tom.vaughan at multicorewareinc.com> wrote:
>
>> Pradeep,
>> In presets.rst you put 2 rows in for limit-refs.  The 2nd one should be
>> limit-modes.
>>
>> +| limit-modes          |    0      |     0     |    0     |   0    |  0
>> |    0   |  1   |   1    |    1     |    0    |
>>
>> Also, I don't see limit-modes changed for slow, slower and veryslow.
>>
>> Please double-check that everything matches our planned changes before we
>> commit this.
>>
>> Tom
>>
>> -----Original Message-----
>> From: x265-devel [mailto:x265-devel-bounces at videolan.org] On Behalf Of
>> Pradeep Ramachandran
>> Sent: Monday, December 21, 2015 12:42 AM
>> To: x265-devel at videolan.org
>> Subject: [x265] [PATCH] presets: Updating presets to improve coding
>> efficiency and speed
>>
>> # HG changeset patch
>> # User Pradeep Ramachandran <pradeep at multicorewareinc.com> # Date
>> 1450687279 -19800
>> #      Mon Dec 21 14:11:19 2015 +0530
>> # Node ID df793ec188d2cb6ea9dc886296ccb4c7448e4523
>> # Parent  0315c0c389c99185cbaa73a0e8acfe9ef60dd817
>> presets: Updating presets to improve  coding efficiency and speed.
>>
>> This commit results in vast improvements in encoding speed and efficiency
>> for several presests. Most important features are increasing # references
>> for some presets and enabling limit-refs and limit-mode to limit impact on
>> speed.
>>
>> diff -r 0315c0c389c9 -r df793ec188d2 doc/reST/cli.rst
>> --- a/doc/reST/cli.rst  Thu Dec 17 23:27:58 2015 +0530
>> +++ b/doc/reST/cli.rst  Mon Dec 21 14:11:19 2015 +0530
>> @@ -685,7 +685,7 @@
>>         (within your decoder level limits) if you enable one or
>>         both of these flags.
>>
>> -       This feature is EXPERIMENTAL and functional at all RD levels.
>> +       Default 3.
>>
>>  .. option:: --limit-modes, --no-limit-modes
>>
>> diff -r 0315c0c389c9 -r df793ec188d2 doc/reST/presets.rst
>> --- a/doc/reST/presets.rst      Thu Dec 17 23:27:58 2015 +0530
>> +++ b/doc/reST/presets.rst      Mon Dec 21 14:11:19 2015 +0530
>> @@ -22,7 +22,7 @@
>>
>> +---------------------+-----------+-----------+----------+--------+------+
>> --------+------+--------+----------+---------+
>>  |                     | ultrafast | superfast | veryfast | faster | fast
>> | medium | slow | slower | veryslow | placebo |
>>
>> +=====================+===========+===========+==========+========+======+
>> ========+======+========+==========+=========+
>> -| ctu                 |   32      |    32     |   32     |  64    |  64
>> |   64   |  64  |  64    |   64     |   64    |
>> +| ctu                 |   32      |    32     |   64     |  64    |  64
>> |   64   |  64  |  64    |   64     |   64    |
>>
>> +---------------------+-----------+-----------+----------+--------+------+
>> --------+------+--------+----------+---------+
>>  | min-cu-size         |   16      |     8     |    8     |   8    |   8
>> |    8   |   8  |   8    |    8     |    8    |
>>
>> +---------------------+-----------+-----------+----------+--------+------+
>> --------+------+--------+----------+---------+
>> @@ -36,7 +36,9 @@
>>
>> +---------------------+-----------+-----------+----------+--------+------+
>> --------+------+--------+----------+---------+
>>  | scenecut            |    0      |    40     |   40     |  40    |  40
>> |   40   |  40  |   40   |   40     |   40    |
>>
>> +---------------------+-----------+-----------+----------+--------+------+
>> --------+------+--------+----------+---------+
>> -| ref                 |    1      |     1     |    1     |   1    |  2
>> |    3   |  3   |   3    |    5     |    5    |
>> +| ref                 |    1      |     1     |    2     |   2    |  3
>> |    3   |  4   |   4    |    5     |    5    |
>> ++---------------------+-----------+-----------+----------+--------+------
>> +--------+------+--------+----------+---------+
>> +| limit-refs          |    0      |     0     |    3     |   3    |  3
>> |    3   |  3   |   2    |    1     |    0    |
>>
>> +---------------------+-----------+-----------+----------+--------+------+
>> --------+------+--------+----------+---------+
>>  | me                  |   dia     |   hex     |   hex    |  hex   | hex
>> |   hex  | star |  star  |   star   |   star  |
>>
>> +---------------------+-----------+-----------+----------+--------+------+
>> --------+------+--------+----------+---------+
>> @@ -48,6 +50,8 @@
>>
>> +---------------------+-----------+-----------+----------+--------+------+
>> --------+------+--------+----------+---------+
>>  | amp                 |    0      |     0     |    0     |   0    |  0
>> |    0   |  0   |   1    |    1     |    1    |
>>
>> +---------------------+-----------+-----------+----------+--------+------+
>> --------+------+--------+----------+---------+
>> +| limit-refs          |    0      |     0     |    0     |   0    |  0
>> |    0   |  1   |   1    |    1     |    0    |
>> ++---------------------+-----------+-----------+----------+--------+------
>> +--------+------+--------+----------+---------+
>>  | max-merge           |    2      |     2     |    2     |   2    |  2
>> |    2   |  3   |   3    |    4     |    5    |
>>
>> +---------------------+-----------+-----------+----------+--------+------+
>> --------+------+--------+----------+---------+
>>  | early-skip          |    1      |     1     |    1     |   1    |  0
>> |    0   |  0   |   0    |    0     |    0    |
>> @@ -66,7 +70,7 @@
>>
>> +---------------------+-----------+-----------+----------+--------+------+
>> --------+------+--------+----------+---------+
>>  | aq-mode             |    0      |     0     |    1     |   1    |  1
>> |    1   |  1   |   1    |    1     |    1    |
>>
>> +---------------------+-----------+-----------+----------+--------+------+
>> --------+------+--------+----------+---------+
>> -| cuTree              |    0      |     0     |    0     |   0    |  1
>> |    1   |  1   |   1    |    1     |    1    |
>> +| cuTree              |    1      |     1     |    1     |   1    |  1
>> |    1   |  1   |   1    |    1     |    1    |
>>
>> +---------------------+-----------+-----------+----------+--------+------+
>> --------+------+--------+----------+---------+
>>  | rdLevel             |    2      |     2     |    2     |   2    |  2
>> |    3   |  4   |   6    |    6     |    6    |
>>
>> +---------------------+-----------+-----------+----------+--------+------+
>> --------+------+--------+----------+---------+
>> diff -r 0315c0c389c9 -r df793ec188d2 source/common/param.cpp
>> --- a/source/common/param.cpp   Thu Dec 17 23:27:58 2015 +0530
>> +++ b/source/common/param.cpp   Mon Dec 21 14:11:19 2015 +0530
>> @@ -159,7 +159,7 @@
>>      param->subpelRefine = 2;
>>      param->searchRange = 57;
>>      param->maxNumMergeCand = 2;
>> -    param->limitReferences = 0;
>> +    param->limitReferences = 3;
>>      param->limitModes = 0;
>>      param->bEnableWeightedPred = 1;
>>      param->bEnableWeightedBiPred = 0;
>> @@ -279,9 +279,9 @@
>>              param->bEnableWeightedPred = 0;
>>              param->rdLevel = 2;
>>              param->maxNumReferences = 1;
>> +            param->limitReferences = 0;
>>              param->rc.aqStrength = 0.0;
>>              param->rc.aqMode = X265_AQ_NONE;
>> -            param->rc.cuTree = 0;
>>              param->rc.qgSize = 32;
>>              param->bEnableFastIntra = 1;
>>          }
>> @@ -296,9 +296,9 @@
>>              param->bEnableWeightedPred = 0;
>>              param->rdLevel = 2;
>>              param->maxNumReferences = 1;
>> +            param->limitReferences = 0;
>>              param->rc.aqStrength = 0.0;
>>              param->rc.aqMode = X265_AQ_NONE;
>> -            param->rc.cuTree = 0;
>>              param->rc.qgSize = 32;
>>              param->bEnableSAO = 0;
>>              param->bEnableFastIntra = 1; @@ -306,13 +306,11 @@
>>          else if (!strcmp(preset, "veryfast"))
>>          {
>>              param->lookaheadDepth = 15;
>> -            param->maxCUSize = 32;
>>              param->bFrameAdaptive = 0;
>>              param->subpelRefine = 1;
>>              param->bEnableEarlySkip = 1;
>>              param->rdLevel = 2;
>> -            param->maxNumReferences = 1;
>> -            param->rc.cuTree = 0;
>> +            param->maxNumReferences = 2;
>>              param->rc.qgSize = 32;
>>              param->bEnableFastIntra = 1;
>>          }
>> @@ -322,8 +320,7 @@
>>              param->bFrameAdaptive = 0;
>>              param->bEnableEarlySkip = 1;
>>              param->rdLevel = 2;
>> -            param->maxNumReferences = 1;
>> -            param->rc.cuTree = 0;
>> +            param->maxNumReferences = 2;
>>              param->bEnableFastIntra = 1;
>>          }
>>          else if (!strcmp(preset, "fast")) @@ -331,7 +328,7 @@
>>              param->lookaheadDepth = 15;
>>              param->bFrameAdaptive = 0;
>>              param->rdLevel = 2;
>> -            param->maxNumReferences = 2;
>> +            param->maxNumReferences = 3;
>>              param->bEnableFastIntra = 1;
>>          }
>>          else if (!strcmp(preset, "medium")) @@ -348,6 +345,7 @@
>>              param->subpelRefine = 3;
>>              param->maxNumMergeCand = 3;
>>              param->searchMethod = X265_STAR_SEARCH;
>> +            param->maxNumReferences = 4;
>>              param->lookaheadSlices = 4; // limit parallelism as already
>> enough work exists
>>          }
>>          else if (!strcmp(preset, "slower")) @@ -365,6 +363,8 @@
>>              param->subpelRefine = 3;
>>              param->maxNumMergeCand = 3;
>>              param->searchMethod = X265_STAR_SEARCH;
>> +            param->maxNumReferences = 4;
>> +            param->limitReferences = 2;
>>              param->bIntraInBFrames = 1;
>>              param->lookaheadSlices = 4; // limit parallelism as already
>> enough work exists
>>          }
>> @@ -384,6 +384,7 @@
>>              param->maxNumMergeCand = 4;
>>              param->searchMethod = X265_STAR_SEARCH;
>>              param->maxNumReferences = 5;
>> +            param->limitReferences = 1;
>>              param->bIntraInBFrames = 1;
>>              param->lookaheadSlices = 0; // disabled for best quality
>>          }
>> @@ -405,6 +406,7 @@
>>              param->searchMethod = X265_STAR_SEARCH;
>>              param->bEnableTransformSkip = 1;
>>              param->maxNumReferences = 5;
>> +            param->limitReferences = 0;
>>              param->rc.bEnableSlowFirstPass = 1;
>>              param->bIntraInBFrames = 1;
>>              param->lookaheadSlices = 0; // disabled for best quality
>> _______________________________________________
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>> _______________________________________________
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>>
>
>
>
> --
> 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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