[原创]X264参数设置轻微探究|『影音数码技术学习交流』 - 『漫游』酷论坛

[原创]X264参数设置轻微探究

superkidx@2007-07-18 20:15

此文是研究小型MKV的X264参数设置与大小速度质量的
如果你对X264参数了如指掌或者只看只压720P 1080P的话请选择无视
对比图片较大也可点击下面的网址
http://photo.mofile.com/cn/album/albumDown.do?albumId=7V43ZHH37U_205

1 首先是速度与大小此测试与质量无关
----------------------------------------------------------------------------
--me hex --nr 0 -q 26 -A none -m 1 其他默认

StartTime:2007-07-18 12:21:08
encoded 2928 frames, 24.75 fps, 724.74 kb/s
EndTime:2007-07-18 12:23:07
---------------------------------------------------------
-A all

StartTime:2007-07-18 12:23:07
encoded 2928 frames, 20.12 fps, 701.26 kb/s
EndTime:2007-07-18 12:25:35
--------------------------------------------------
-m 3

StartTime:2007-07-18 12:25:35
encoded 2928 frames, 21.07 fps, 708.81 kb/s
EndTime:2007-07-18 12:27:56
--------------------------------------------------
-m 5

StartTime:2007-07-18 12:27:57
encoded 2928 frames, 18.07 fps, 703.72 kb/s
EndTime:2007-07-18 12:30:41
----------------------------------------------------

-------------------------------------------------------

-q 20

StartTime:2007-07-18 12:59:51
x264 [info]: slice I:19 Avg QP:16.00 size: 24156
x264 [info]: slice P:1695 Avg QP:20.00 size: 9189
x264 [info]: slice B:1214 Avg QP:21.55 size: 1803
x264 [info]: mb I I16..4: 31.2% 0.0% 68.8%
x264 [info]: mb P I16..4: 19.7% 0.0% 0.0% P16..4: 47.0% 0.0% 0.0% 0.0% 0.0% skip:33.3%
x264 [info]: mb B I16..4: 1.2% 0.0% 0.0% B16..8: 22.2% 0.0% 0.0% direct:10.4% skip:66.3%
x264 [info]: direct mvs spatial:98.6% temporal:1.4%
x264 [info]: ref P 75.4% 24.6%
x264 [info]: ref B 82.8% 17.2%
x264 [info]: kb/s:1492.3
encoded 2928 frames, 22.27 fps, 1492.39 kb/s
EndTime:2007-07-18 13:02:04
--------------------------------------------------
-q 30

StartTime:2007-07-18 13:02:04
x264 [info]: slice I:19 Avg QP:26.00 size: 9720
x264 [info]: slice P:1696 Avg QP:30.00 size: 2927
x264 [info]: slice B:1213 Avg QP:31.55 size: 391
x264 [info]: mb I I16..4: 52.0% 0.0% 48.0%
x264 [info]: mb P I16..4: 19.9% 0.0% 0.0% P16..4: 30.1% 0.0% 0.0% 0.0% 0.0% skip:50.0%
x264 [info]: mb B I16..4: 0.8% 0.0% 0.0% B16..8: 9.8% 0.0% 0.0% direct: 2.8% skip:86.5%
x264 [info]: direct mvs spatial:94.5% temporal:5.5%
x264 [info]: ref P 74.5% 25.5%
x264 [info]: ref B 84.2% 15.8%
x264 [info]: kb/s:460.5
encoded 2928 frames, 26.08 fps, 460.67 kb/s
EndTime:2007-07-18 13:03:58
--------------------------------------------------
-b 16

StartTime:2007-07-18 13:03:59
x264 [info]: slice I:19 Avg QP:22.00 size: 14643
x264 [info]: slice P:1275 Avg QP:26.00 size: 5703
x264 [info]: slice B:1634 Avg QP:27.80 size: 754
x264 [info]: mb I I16..4: 42.4% 0.0% 57.6%
x264 [info]: mb P I16..4: 26.0% 0.0% 0.0% P16..4: 42.1% 0.0% 0.0% 0.0% 0.0% skip:32.0%
x264 [info]: mb B I16..4: 0.9% 0.0% 0.0% B16..8: 13.5% 0.0% 0.0% direct: 4.5% skip:81.1%
x264 [info]: direct mvs spatial:96.4% temporal:3.6%
x264 [info]: ref P 76.6% 23.4%
x264 [info]: ref B 81.5% 18.5%
x264 [info]: kb/s:719.1
encoded 2928 frames, 24.71 fps, 719.20 kb/s
EndTime:2007-07-18 13:05:59
--------------------------------------------------
-r 16

StartTime:2007-07-18 13:06:00
x264 [info]: slice I:22 Avg QP:22.00 size: 14142
x264 [info]: slice P:1756 Avg QP:26.00 size: 3295
x264 [info]: slice B:1150 Avg QP:27.58 size: 555
x264 [info]: mb I I16..4: 50.7% 0.0% 49.3%
x264 [info]: mb P I16..4: 17.3% 0.0% 0.0% P16..4: 41.3% 0.0% 0.0% 0.0% 0.0% skip:41.4%
x264 [info]: mb B I16..4: 0.7% 0.0% 0.0% B16..8: 14.2% 0.0% 0.0% direct: 3.3% skip:81.8%
x264 [info]: direct mvs spatial:91.7% temporal:8.3%
x264 [info]: ref P 52.6% 8.5% 4.3% 2.7% 3.9% 3.2% 3.3% 4.8% 6.3% 3.4% 1.1% 0.9% 0.8% 1.2% 1.5% 1.5%
x264 [info]: ref B 74.5% 6.8% 3.7% 1.3% 1.4% 1.6% 1.8% 1.8% 2.1% 1.4% 0.8% 0.4% 0.6% 0.9% 0.8%
x264 [info]: kb/s:551.6
encoded 2928 frames, 7.53 fps, 551.74 kb/s
EndTime:2007-07-18 13:12:31
--------------------------------------------------
-nr 100

StartTime:2007-07-18 13:12:31
x264 [info]: slice I:24 Avg QP:22.00 size: 14674
x264 [info]: slice P:1753 Avg QP:26.00 size: 4210
x264 [info]: slice B:1151 Avg QP:27.58 size: 587
x264 [info]: mb I I16..4: 48.4% 0.0% 51.6%
x264 [info]: mb P I16..4: 24.3% 0.0% 0.0% P16..4: 34.8% 0.0% 0.0% 0.0% 0.0% skip:41.0%
x264 [info]: mb B I16..4: 1.0% 0.0% 0.0% B16..8: 14.3% 0.0% 0.0% direct: 3.5% skip:81.2%
x264 [info]: direct mvs spatial:94.1% temporal:5.9%
x264 [info]: ref P 78.2% 21.8%
x264 [info]: ref B 84.7% 15.3%
x264 [info]: kb/s:688.6
encoded 2928 frames, 17.62 fps, 688.72 kb/s
EndTime:2007-07-18 13:15:19
--------------------------------------------------
-q 20 --me umh
StartTime:2007-07-18 13:36:52
x264 [info]: slice I:21 Avg QP:16.00 size: 23404
x264 [info]: slice P:1756 Avg QP:20.00 size: 8671
x264 [info]: slice B:1151 Avg QP:21.58 size: 1566
x264 [info]: mb I I16..4: 37.2% 0.0% 62.8%
x264 [info]: mb P I16..4: 20.9% 0.0% 0.0% P16..4: 46.3% 0.0% 0.0% 0.0% 0.0% skip:32.7%
x264 [info]: mb B I16..4: 1.4% 0.0% 0.0% B16..8: 24.0% 0.0% 0.0% direct: 7.9% skip:66.7%
x264 [info]: direct mvs spatial:96.6% temporal:3.4%
x264 [info]: ref P 78.0% 22.0%
x264 [info]: ref B 84.4% 15.6%
x264 [info]: kb/s:1434.6
encoded 2928 frames, 16.11 fps, 1434.72 kb/s
EndTime:2007-07-18 13:39:54
--------------------------------------------------
-q 20 -r 5

StartTime:2007-07-18 13:39:54
x264 [info]: slice I:17 Avg QP:16.00 size: 22797
x264 [info]: slice P:1698 Avg QP:20.00 size: 8831
x264 [info]: slice B:1213 Avg QP:21.55 size: 1822
x264 [info]: mb I I16..4: 30.2% 0.0% 69.8%
x264 [info]: mb P I16..4: 16.0% 0.0% 0.0% P16..4: 50.7% 0.0% 0.0% 0.0% 0.0% skip:33.4%
x264 [info]: mb B I16..4: 1.0% 0.0% 0.0% B16..8: 22.3% 0.0% 0.0% direct:10.3% skip:66.3%
x264 [info]: direct mvs spatial:96.7% temporal:3.3%
x264 [info]: ref P 64.3% 13.5% 7.4% 5.7% 9.1%
x264 [info]: ref B 78.0% 10.5% 6.0% 2.9% 2.6%
x264 [info]: kb/s:1440.6
encoded 2928 frames, 19.25 fps, 1440.71 kb/s
EndTime:2007-07-18 13:42:27
--------------------------------------------------
-q 20 -nr 200

StartTime:2007-07-18 13:42:27
x264 [info]: slice I:19 Avg QP:16.00 size: 25247
x264 [info]: slice P:1696 Avg QP:20.00 size: 8140
x264 [info]: slice B:1213 Avg QP:21.55 size: 1599
x264 [info]: mb I I16..4: 27.9% 0.0% 72.1%
x264 [info]: mb P I16..4: 19.8% 0.0% 0.0% P16..4: 46.9% 0.0% 0.0% 0.0% 0.0% skip:33.3%
x264 [info]: mb B I16..4: 1.2% 0.0% 0.0% B16..8: 22.4% 0.0% 0.0% direct:10.3% skip:66.1%
x264 [info]: direct mvs spatial:99.1% temporal:0.9%
x264 [info]: ref P 74.8% 25.2%
x264 [info]: ref B 82.4% 17.6%
x264 [info]: kb/s:1328.6
encoded 2928 frames, 21.33 fps, 1328.71 kb/s
EndTime:2007-07-18 13:44:46
=========================================
-A all -m 3 在速度和大小上获得较好的平衡推荐
-q 是影响码率的关键二次压制推荐25-28甚至更小
-b 一般设3就够了大了也没什么意思
-nr 能够有效减小码率
-r 16 确实非常有效的减小了码率然而确实是速度杀手但是设置-r 5 效果比较不显著推荐 2-3
--me umh 不推荐

===========================================================
2 raw: last exile op divx 720x480 码率4000还是2000忘了
--------------------------------------------------
--progress --no-psnr --no-ssim --cqm flat --mixed-refs --scenecut 50 -I 250 -i 25 --me hex --sar 1:1 --threads 1 -r 3 --nr 0 -f 0:0 -b 3 --direct "auto" --bime --b-bias 0 --b-pyramid -w -q 26 --qpmin 10 --qpmax 51 --8x8dct -A p8x8,p4x4,b8x8,i8x8,i4x4 --ipratio 1.500000 --pbratio 1.300000 -m 3

StartTime:2007-07-18 14:38:42

x264 [info]: slice I:56 Avg QP:22.00 size: 11058
x264 [info]: slice P:2005 Avg QP:26.00 size: 6036
x264 [info]: slice B:726 Avg QP:27.75 size: 1300
x264 [info]: mb I I16..4: 19.2% 66.2% 14.6%
x264 [info]: mb P I16..4: 8.2% 42.2% 3.8% P16..4: 19.5% 5.4% 1.6% 0.2% 0.1% skip:19.0%
x264 [info]: mb B I16..4: 0.3% 2.7% 0.4% B16..8: 12.6% 0.6% 1.0% direct: 4.3% skip:78.2%
x264 [info]: 8x8 transform intra:77.3% inter:57.3%
x264 [info]: direct mvs spatial:99.6% temporal:0.4%
x264 [info]: ref P 79.5% 11.7% 8.8%
x264 [info]: ref B 87.2% 8.1% 4.7%
x264 [info]: kb/s:1175.7
encoded 2787 frames, 8.99 fps, 1175.86 kb/s
EndTime:2007-07-18 14:43:52
--------------------------------------------------
-m 5

StartTime:2007-07-18 14:43:53

x264 [info]: slice I:59 Avg QP:22.00 size: 11388
x264 [info]: slice P:2007 Avg QP:26.00 size: 5985
x264 [info]: slice B:721 Avg QP:27.75 size: 1290
x264 [info]: mb I I16..4: 19.0% 65.9% 15.0%
x264 [info]: mb P I16..4: 8.1% 41.7% 3.6% P16..4: 19.2% 5.9% 1.8% 0.3% 0.1% skip:19.2%
x264 [info]: mb B I16..4: 0.3% 2.6% 0.3% B16..8: 13.5% 0.6% 1.1% direct: 3.6% skip:78.0%
x264 [info]: 8x8 transform intra:77.5% inter:56.3%
x264 [info]: direct mvs spatial:99.6% temporal:0.4%
x264 [info]: ref P 80.8% 11.0% 8.3%
x264 [info]: ref B 88.3% 7.2% 4.5%
x264 [info]: kb/s:1171.2

encoded 2787 frames, 6.23 fps, 1171.39 kb/s
EndTime:2007-07-18 14:51:22
--------------------------------------------------
umh

StartTime:2007-07-18 14:51:22

x264 [info]: slice I:48 Avg QP:22.00 size: 11025
x264 [info]: slice P:2014 Avg QP:26.00 size: 6009
x264 [info]: slice B:725 Avg QP:27.75 size: 1294
x264 [info]: mb I I16..4: 20.6% 64.2% 15.2%
x264 [info]: mb P I16..4: 8.3% 41.7% 3.4% P16..4: 19.9% 5.7% 2.0% 0.2% 0.1% skip:18.8%
x264 [info]: mb B I16..4: 0.2% 2.6% 0.3% B16..8: 12.8% 0.6% 1.1% direct: 4.2% skip:78.1%
x264 [info]: 8x8 transform intra:77.7% inter:55.5%
x264 [info]: direct mvs spatial:99.6% temporal:0.4%
x264 [info]: ref P 79.1% 11.8% 9.1%
x264 [info]: ref B 86.9% 8.1% 5.0%
x264 [info]: kb/s:1167.3

encoded 2787 frames, 5.88 fps, 1167.49 kb/s
EndTime:2007-07-18 14:59:18
=================================
-m 5 虽然是默认参数不过实在是速度杀手而且质量没什么显著提升不推荐
umh 更加不推荐

对比图片

复制代码

umh
[url]http://pdjh02.mofile.com/p/1/2007/7/18/BF/BFTWLI0FDY_205.jpg[/url]
-m 5
[url]http://pdjh02.mofile.com/p/1/2007/7/18/P2/P2YIKG22MJ_205.jpg[/url]
基本
[url]http://pdjh02.mofile.com/p/1/2007/7/18/P2/P2YIKG22MJ_205.jpg[/url]

=======================================================
raw: 妄想代理人 op divx 1024*576 码率4000还是2000忘了
--------------------------------------------------
--progress --no-psnr --no-ssim --cqm flat --mixed-refs --scenecut 50 -I 250 -i 25 --me hex --sar 1:1 --threads 1 -r 3 --nr 0 -f 0:0 -b 3 --direct "auto" --bime --b-bias 0 --b-pyramid -w -q 26 --qpmin 10 --qpmax 51 --8x8dct -A p8x8,p4x4,b8x8,i8x8,i4x4 --ipratio 1.500000 --pbratio 1.300000 -m 3

StartTime:2007-07-18 15:40:55
x264 [info]: slice I:22 Avg QP:22.00 size: 23557
x264 [info]: slice P:1725 Avg QP:26.00 size: 8837
x264 [info]: slice B:408 Avg QP:29.42 size: 2235
x264 [info]: mb I I16..4: 13.3% 65.7% 21.0%
x264 [info]: mb P I16..4: 4.2% 24.0% 3.5% P16..4: 20.2% 6.6% 1.9% 0.2% 0.1% skip:39.3%
x264 [info]: mb B I16..4: 0.3% 4.0% 0.9% B16..8: 9.0% 0.7% 0.8% direct: 2.0% skip:82.3%
x264 [info]: 8x8 transform intra:75.4% inter:56.3%
x264 [info]: direct mvs spatial:99.3% temporal:0.7%
x264 [info]: ref P 76.2% 13.7% 10.1%
x264 [info]: ref B 69.5% 17.6% 12.9%
x264 [info]: kb/s:1484.1

encoded 2155 frames, 5.73 fps, 1484.25 kb/s
EndTime:2007-07-18 15:47:14
--------------------------------------------------
-nr 100

StartTime:2007-07-18 15:47:14

x264 [info]: slice I:22 Avg QP:22.00 size: 23557
x264 [info]: slice P:1725 Avg QP:26.00 size: 8715
x264 [info]: slice B:408 Avg QP:29.42 size: 2218
x264 [info]: mb I I16..4: 13.3% 65.7% 21.0%
x264 [info]: mb P I16..4: 4.2% 24.0% 3.5% P16..4: 20.2% 6.6% 1.9% 0.2% 0.1% skip:39.3%
x264 [info]: mb B I16..4: 0.3% 4.0% 0.9% B16..8: 9.1% 0.7% 0.8% direct: 2.0% skip:82.2%
x264 [info]: 8x8 transform intra:75.4% inter:55.7%
x264 [info]: direct mvs spatial:98.8% temporal:1.2%
x264 [info]: ref P 76.1% 13.8% 10.1%
x264 [info]: ref B 69.6% 17.6% 12.8%
x264 [info]: kb/s:1464.8

encoded 2155 frames, 5.65 fps, 1464.93 kb/s
EndTime:2007-07-18 15:53:38
--------------------------------------------------
-r 8

StartTime:2007-07-18 15:53:39

x264 [info]: slice I:20 Avg QP:22.00 size: 23103
x264 [info]: slice P:1727 Avg QP:26.00 size: 8580
x264 [info]: slice B:408 Avg QP:29.42 size: 2104
x264 [info]: mb I I16..4: 13.6% 66.4% 20.0%
x264 [info]: mb P I16..4: 4.1% 23.0% 2.8% P16..4: 21.1% 7.1% 2.4% 0.2% 0.1% skip:39.3%
x264 [info]: mb B I16..4: 0.3% 3.7% 0.7% B16..8: 9.5% 0.7% 0.8% direct: 1.9% skip:82.4%
x264 [info]: 8x8 transform intra:76.7% inter:55.8%
x264 [info]: direct mvs spatial:97.8% temporal:2.2%
x264 [info]: ref P 67.6% 10.7% 7.1% 3.7% 3.5% 3.0% 2.5% 2.0%
x264 [info]: ref B 58.7% 13.0% 8.3% 5.9% 4.6% 3.0% 3.3% 3.2%
x264 [info]: kb/s:1436.4
encoded 2155 frames, 3.91 fps, 1436.50 kb/s
EndTime:2007-07-18 16:02:51
--------------------------------------------------
--ipratio 1.800000 --pbratio 1.200000

StartTime:2007-07-18 16:02:52
x264 [info]: slice I:22 Avg QP:21.00 size: 25251
x264 [info]: slice P:1725 Avg QP:26.00 size: 8833
x264 [info]: slice B:408 Avg QP:27.71 size: 2948
x264 [info]: mb I I16..4: 13.3% 65.2% 21.5%
x264 [info]: mb P I16..4: 4.2% 24.0% 3.5% P16..4: 20.2% 6.6% 1.9% 0.2% 0.1% skip:39.3%
x264 [info]: mb B I16..4: 0.4% 4.0% 1.2% B16..8: 10.9% 0.9% 1.1% direct: 3.5% skip:78.1%
x264 [info]: 8x8 transform intra:75.2% inter:56.4%
x264 [info]: direct mvs spatial:98.8% temporal:1.2%
x264 [info]: ref P 76.1% 13.9% 10.1%
x264 [info]: ref B 70.2% 17.5% 12.3%
x264 [info]: kb/s:1512.6
encoded 2155 frames, 5.69 fps, 1512.73 kb/s
EndTime:2007-07-18 16:09:13
================================
-r -nr 都可有效减小码率但前者是速度杀手不推荐
--ipratio 增加的同时建议也增加 --pbratio

对比图片

复制代码

-r 8
[url]http://pdjh02.mofile.com/p/1/2007/7/18/4M/4M0EHXIZG8_205.jpg[/url]
-nr 100
[url]http://pdjh02.mofile.com/p/1/2007/7/18/OT/OT1ACVH3HZ_205.jpg[/url]
ip 1.8 pb 1.2
[url]http://pdjh02.mofile.com/p/1/2007/7/18/DW/DW3PA1E7MU_205.jpg[/url]
基本
[url]http://pdjh02.mofile.com/p/1/2007/7/18/TA/TADKKV8R79_205.jpg[/url]

================================================
raw: ergo proxy op divx 4000+ kb/s 704*306
--------------------------------------------------
--progress --no-psnr --no-ssim --cqm flat --mixed-refs --scenecut 50 -I 250 -i 25 --me hex --sar 1:1 --threads 1 -r 3 --nr 0 -f 0:0 -b 3 --direct "auto" --bime --b-bias 0 --b-pyramid -w -q 26 --qpmin 10 --qpmax 51 --8x8dct -A p8x8,p4x4,b8x8,i8x8,i4x4 --ipratio 1.500000 --pbratio 1.500000 -m 3

StartTime:2007-07-18 16:51:26
x264 [info]: slice I:41 Avg QP:22.00 size: 27225
x264 [info]: slice P:1821 Avg QP:26.00 size: 11003
x264 [info]: slice B:670 Avg QP:29.78 size: 2077
x264 [info]: mb I I16..4: 12.8% 52.2% 35.0%
x264 [info]: mb P I16..4: 5.4% 36.9% 5.9% P16..4: 20.2% 7.8% 3.7% 0.6% 0.4% skip:19.3%
x264 [info]: mb B I16..4: 0.5% 5.2% 0.6% B16..8: 13.3% 1.1% 2.0% direct: 6.2% skip:71.0%
x264 [info]: 8x8 transform intra:75.9% inter:47.5%
x264 [info]: direct mvs spatial:98.7% temporal:1.3%
x264 [info]: ref P 75.7% 13.9% 10.3%
x264 [info]: ref B 80.0% 11.7% 8.3%
x264 [info]: kb/s:1707.9

encoded 2532 frames, 10.02 fps, 1708.02 kb/s
EndTime:2007-07-18 16:55:41
--------------------------------------------------
-t 1

StartTime:2007-07-18 16:55:41

x264 [info]: slice I:42 Avg QP:22.00 size: 27506
x264 [info]: slice P:1820 Avg QP:26.00 size: 10819
x264 [info]: slice B:670 Avg QP:29.78 size: 2117
x264 [info]: mb I I16..4: 12.5% 52.9% 34.6%
x264 [info]: mb P I16..4: 5.5% 36.4% 5.8% P16..4: 20.2% 7.9% 3.7% 0.6% 0.4% skip:19.4%
x264 [info]: mb B I16..4: 0.5% 5.2% 0.6% B16..8: 13.0% 1.1% 2.0% direct: 7.0% skip:70.5%
x264 [info]: 8x8 transform intra:75.4% inter:51.9%
x264 [info]: direct mvs spatial:98.7% temporal:1.3%
x264 [info]: ref P 75.0% 14.4% 10.6%
x264 [info]: ref B 79.2% 12.1% 8.7%
x264 [info]: kb/s:1686.6
encoded 2532 frames, 8.55 fps, 1686.75 kb/s
EndTime:2007-07-18 17:00:39
--------------------------------------------------
-t 2

StartTime:2007-07-18 17:00:40

x264 [info]: slice I:39 Avg QP:22.00 size: 26720
x264 [info]: slice P:1823 Avg QP:26.00 size: 10916
x264 [info]: slice B:670 Avg QP:29.78 size: 2137
x264 [info]: mb I I16..4: 13.5% 53.5% 32.9%
x264 [info]: mb P I16..4: 5.3% 35.2% 5.0% P16..4: 20.8% 8.6% 4.8% 0.6% 0.4% skip:19.3%
x264 [info]: mb B I16..4: 0.5% 4.9% 0.6% B16..8: 13.3% 1.1% 2.1% direct: 6.8% skip:70.8%
x264 [info]: 8x8 transform intra:76.5% inter:50.9%
x264 [info]: direct mvs spatial:98.7% temporal:1.3%
x264 [info]: ref P 66.3% 11.8% 7.7% 3.9% 3.2% 2.7% 2.4% 1.9%
x264 [info]: ref B 71.6% 10.1% 5.6% 4.1% 2.8% 2.2% 2.1% 1.5%
x264 [info]: kb/s:1694.9

encoded 2532 frames, 6.02 fps, 1695.06 kb/s
EndTime:2007-07-18 17:07:42
--------------------------------------------------
--ipratio 1.800000 --pbratio 1.500000

StartTime:2007-07-18 17:07:42
x264 [info]: slice I:42 Avg QP:21.00 size: 30666
x264 [info]: slice P:1820 Avg QP:26.00 size: 10999
x264 [info]: slice B:670 Avg QP:29.78 size: 2078
x264 [info]: mb I I16..4: 12.5% 52.3% 35.2%
x264 [info]: mb P I16..4: 5.4% 36.9% 5.9% P16..4: 20.1% 7.8% 3.7% 0.6% 0.4% skip:19.3%
x264 [info]: mb B I16..4: 0.5% 5.2% 0.6% B16..8: 13.4% 1.1% 2.0% direct: 6.2% skip:71.0%
x264 [info]: 8x8 transform intra:75.8% inter:47.5%
x264 [info]: direct mvs spatial:98.7% temporal:1.3%
x264 [info]: ref P 75.7% 14.0% 10.3%
x264 [info]: ref B 79.9% 11.8% 8.2%
x264 [info]: kb/s:1719.5
encoded 2532 frames, 10.00 fps, 1719.66 kb/s
EndTime:2007-07-18 17:11:58
=============================
推荐使用 -t 1
--ipratio 增大速度基本不变码率没有显著增加然而I帧QP提高一个单位推荐

对比图片

复制代码

-t 1
[url]http://pdjh02.mofile.com/p/1/2007/7/18/ZF/ZFO60WS0KR_205.jpg[/url]
-t 2
[url]http://pdjh02.mofile.com/p/1/2007/7/18/DM/DM3Z08F3MZ_205.jpg[/url]
基本
[url]http://pdjh02.mofile.com/p/1/2007/7/18/P9/P9OF0Q0T28_205.jpg[/url]
ip 1.8 pb 1.5
[url]http://pdjh02.mofile.com/p/1/2007/7/18/HL/HLD4VP6S99_205.jpg[/url]

==============================================================
以上

引用

ZhenGod@2007-07-18 21:09

ｌｚ　辛苦了　～～　　

引用

kzhou@2007-07-18 21:40

-r 16 确实非常有效的减小了码率然而确实是速度杀手但是设置-r 5 效果比较不显著推荐 2-3
＝＝＝＝＝＝＝＝＝＝＝
这个，你的第一批测试里面有个默认的q26 -r1 724.74 kb/s
，后面有个q26 -r16 551.74 kb/s
，没看到q26 -r5或q26 -r2-3压出来的码率是多少，上面那个结论是怎么出来的？

另外要否定-b 16的话最好找段静态多的动画也压一下才能下结论。

话说-nr。。。有人用这个么？比起deen之类的怎么样？

引用

superkidx@2007-07-18 22:27

引用
最初由 kzhou 发布
-r 16 确实非常有效的减小了码率然而确实是速度杀手但是设置-r 5 效果比较不显著推荐 2-3
＝＝＝＝＝＝＝＝＝＝＝
这个，你的第一批测试里面有个默认的q26 -r1 724.74 kb/s
，后面有个q26 -r16 551.74 kb/s
，没看到q26 -r5或q26 -r2-3压出来的码率是多少，上面那个结论是怎么出来的？

另外要否定-b 16的话最好找段静态多的动画也压一下才能下结论。

话说-nr。。。有人用这个么？比起deen之类的怎么样？

-q 20 -r 5

StartTime:2007-07-18 13:39:54
x264 [info]: slice I:17 Avg QP:16.00 size: 22797
x264 [info]: slice P:1698 Avg QP:20.00 size: 8831
x264 [info]: slice B:1213 Avg QP:21.55 size: 1822
x264 [info]: mb I I16..4: 30.2% 0.0% 69.8%
x264 [info]: mb P I16..4: 16.0% 0.0% 0.0% P16..4: 50.7% 0.0% 0.0% 0.0% 0.0% skip:33.4%
x264 [info]: mb B I16..4: 1.0% 0.0% 0.0% B16..8: 22.3% 0.0% 0.0% direct:10.3% skip:66.3%
x264 [info]: direct mvs spatial:96.7% temporal:3.3%
x264 [info]: ref P 64.3% 13.5% 7.4% 5.7% 9.1%
x264 [info]: ref B 78.0% 10.5% 6.0% 2.9% 2.6%
x264 [info]: kb/s:1440.6
encoded 2928 frames, 19.25 fps, 1440.71 kb/s
EndTime:2007-07-18 13:42:27

-nr 雷鸣用的吧

-b 16 在DOOM9上被说是USELESS的因为这个设置是最大值 99%都是3以内的

引用

kzhou@2007-07-19 09:08

-q 20 -r 5和原来q26的两个如何比较。。。
我还是等有空了自己试试去了。
不过-r这边的人用到小于5的不多吧？大家都是机器猛又有时间的人。。－－

引用

superkidx@2007-07-19 09:25

引用
最初由 kzhou 发布
-q 20 -r 5和原来q26的两个如何比较。。。
我还是等有空了自己试试去了。
不过-r这边的人用到小于5的不多吧？大家都是机器猛又有时间的人。。－－

-q 20 -r 5 和 -q 20 以及 q 20 -nr 200 比较显然 -nr 200 作用显著

引用

雷鸣@2007-07-19 09:33

引用
最初由 superkidx 发布

-nr 雷鸣用的吧

-b 16 在DOOM9上被说是USELESS的因为这个设置是最大值 99%都是3以内的

[/han] 我什么时候用这个了……只是说它可以减小码率，我自己又不用……

引用

superkidx@2007-07-19 09:59

引用
最初由雷鸣发布

[/han] 我什么时候用这个了……只是说它可以减小码率，我自己又不用……

http://popgo.net/bbs/showthread.php?s=&threadid=430697

nr = 170

引用

jerryds@2007-07-19 19:02

压动画，开aq能明显减少大的block
--aq-strength 0.5 --aq-sensitivity 5

引用

雷鸣@2007-07-19 19:38

啥时的东西也翻出来……
aq？没听说过，什么时候看看去。

编辑：x264 --longhelp 未发现aq参数……

引用

superkidx@2007-07-19 20:00

引用
最初由雷鸣发布
啥时的东西也翻出来……
aq？没听说过，什么时候看看去。

编辑：x264 --longhelp 未发现aq参数……

是新的特性吧

另外你签名中的MOFILE动画质量怎么那么好啊

引用

雷鸣@2007-07-19 20:02

引用
最初由 superkidx 发布

是新的特性吧

另外你签名中的MOFILE动画质量怎么那么好啊

具体看这里
http://popgo.net/bbs/showthread.php?s=&threadid=452493

引用

jerryds@2007-07-19 20:21

sharktooth 版才有的额外的patch

http://mirror05.x264.nl/Cef/

引用

techneek@2007-07-29 09:54

nr对速度影响很小，至少nr100对速度影响很小～

在固顶码率下，如果开nr100，我测试的结果是提高了PSNR但降低了SSIM～

CQ模式下如果开nr100,在速度牺牲4%的情况下，码率下降了6%。

另外，我用下面的脚本分析一下nr都干了些什么

a=directshowsource("nr0.mkv",25)
b=directshowsource("nr100.mkv",25)
Subtract(a,b)

发现nr主要是磨去了物体边缘和带复杂纹理的表面上的噪声，这种噪声类似雪花点也就是白噪声，我想觉得从观看角度上讲，去掉这些噪声是有好处的。尤其对于动画片更是如此。对于低码率下的电影也能提高主观观感。另外nr对速度影响很小，比外置去噪滤镜划算～

引用

superkidx@2007-07-29 14:10

引用
最初由 techneek 发布
nr对速度影响很小，至少nr100对速度影响很小～

在固顶码率下，如果开nr100，我测试的结果是提高了PSNR但降低了SSIM～

CQ模式下如果开nr100,在速度牺牲4%的情况下，码率下降了6%。

另外，我用下面的脚本分析一下nr都干了些什么

a=directshowsource("nr0.mkv",25)
b=directshowsource("nr100.mkv",25)
Subtract(a,b)

发现nr主要是磨去了物体边缘和带复杂纹理的表面上的噪声，这种噪声类似雪花点也就是白噪声，我想觉得从观看角度上讲，去掉这些噪声是有好处的。尤其对于动画片更是如此。对于低码率下的电影也能提高主观观感。另外nr对速度影响很小，比外置去噪滤镜划算～

我测试的感觉是速度基本不降但码率显著下降

引用

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