关于x264编码psy_rd参数的相关帖子=。=

901 关闭PsyRDO的log


Log for job job1

Job commandline: "F:\comic\media\MeGUI2\tools\x264\x264.exe" --crf 20.0 --ref 16 --mixed-refs --no-fast-pskip --bframes 16 --b-pyramid --b-rdo --bime --weightb --direct auto --filter 1,1 --subme 7 --trellis 2 --partitions p8x8,b8x8,i4x4,i8x8 --8x8dct --me umh --threads auto --thread-input --sar 1:1 --progress --no-psnr --no-ssim --output "F:\avc.mp4" "F:\avc.avs" --aq-mode 0 --rdcmp ssd
avis [info]: 704x396 @ 23.98 fps (2515 frames)
x264 [warning]: width or height not divisible by 16 (704x396), compression will suffer.
x264 [info]: using SAR=1/1
x264 [info]: using cpu capabilities: MMX2 Cache64
mp4 [info]: initial delay 2002 (scale 24000)
x264 [info]: slice I:30Avg QP:19.73 size: 25435
x264 [info]: slice P:1758 Avg QP:22.45 size: 11150
x264 [info]: slice B:727 Avg QP:22.80 size: 1997
x264 [info]: mb I I16..4: 30.7% 34.7% 34.6%
x264 [info]: mb P I16..4: 11.2% 12.0% 6.3% P16..4: 34.1% 12.2% 7.5% 0.0% 0.0%skip:16.7%
x264 [info]: mb B I16..4: 0.3% 0.2% 0.2% B16..8: 21.8% 1.5% 2.7% direct: 4.5% skip:68.9%
x264 [info]: 8x8 transform intra:40.2% inter:49.2%
x264 [info]: direct mvs spatial:97.7% temporal:2.3%
x264 [info]: ref P 76.4% 9.1% 4.6% 1.9% 1.5% 1.2% 1.1% 0.9% 0.7% 0.7% 0.5% 0.3% 0.3% 0.3% 0.3% 0.3%
x264 [info]: ref B 79.3% 8.5% 3.2% 1.9% 1.6% 0.9% 0.8% 0.5% 0.8% 0.7% 0.5% 0.4% 0.3% 0.3% 0.2%
x264 [info]: kb/s:1663.9

encoded 2515 frames, 3.74 fps, 1664.06 kb/s

desired video bitrate of this job: 20 kbit/s - obtained video bitrate (approximate): 1665 kbit/s


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901 开启PsyRDO的log

Job commandline: "F:\comic\media\MeGUI2\tools\x264\x264.exe" --crf 20.0 --ref 16 --mixed-refs --no-fast-pskip --bframes 16 --b-pyramid --b-rdo --bime --weightb --direct auto --filter 1,1 --subme 7 --trellis 2 --partitions p8x8,b8x8,i4x4,i8x8 --8x8dct --me umh --threads auto --thread-input --sar 1:1 --progress --no-psnr --no-ssim --output "F:\avc.mp4" "F:\avc.avs" --aq-mode 0
avis [info]: 704x396 @ 23.98 fps (2515 frames)
x264 [warning]: width or height not divisible by 16 (704x396), compression will suffer.
x264 [info]: using SAR=1/1
x264 [info]: using cpu capabilities: MMX2 Cache64
mp4 [info]: initial delay 2002 (scale 24000)
x264 [info]: slice I:30Avg QP:19.73 size: 29812
x264 [info]: slice P:1758 Avg QP:22.45 size: 12575
x264 [info]: slice B:727 Avg QP:22.80 size: 2541
x264 [info]: mb I I16..4: 25.4% 51.1% 23.5%
x264 [info]: mb P I16..4: 8.4% 10.0% 4.1% P16..4: 35.6% 13.8% 13.2% 0.0% 0.0%skip:14.9%
x264 [info]: mb B I16..4: 0.2% 0.1% 0.1% B16..8: 32.7% 1.4% 4.6% direct: 5.0% skip:55.9%
x264 [info]: 8x8 transform intra:44.9% inter:50.3%
x264 [info]: direct mvs spatial:94.6% temporal:5.4%
x264 [info]: ref P 74.9% 9.6% 4.8% 2.0% 1.6% 1.3% 1.2% 0.9% 0.8% 0.7% 0.5% 0.4% 0.3% 0.3% 0.3% 0.3%
x264 [info]: ref B 78.7% 9.4% 3.5% 1.8% 1.5% 0.9% 0.7% 0.5% 0.7% 0.6% 0.5% 0.3% 0.3% 0.3% 0.2%
x264 [info]: kb/s:1895.0

encoded 2515 frames, 3.45 fps, 1895.16 kb/s

desired video bitrate of this job: 20 kbit/s - obtained video bitrate (approximate): 1896 kbit/s

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915默认开启PsyRDO的log

--[NoImage] Job commandline: "F:\comic\media\MeGUI\tools\x264\x264.exe" --crf 20.0 --ref 16 --mixed-refs --no-fast-pskip --bframes 16 --b-pyramid --b-rdo --bime --weightb --direct auto --filter 1,1 --subme 7 --trellis 2 --partitions p8x8,b8x8,i4x4,i8x8 --8x8dct --me umh --threads auto --thread-input --aq-mode 0 --sar 1:1 --progress --no-psnr --no-ssim --output "F:\avc.mp4" "F:\avc.avs"
--[Information] [2008-7-22 6:44:48] Encoding started
--[NoImage] Standard output stream:
--[NoImage] Standard error stream
---[NoImage] avis [info]: 704x396 @ 23.98 fps (2515 frames)
---[NoImage] x264 [warning]: width or height not divisible by 16 (704x396), compression will suffer.
---[NoImage] x264 [info]: using SAR=1/1
---[NoImage] x264 [info]: using cpu capabilities: MMX2 Cache64
---[NoImage] mp4 [info]: initial delay 2002 (scale 24000)
---[NoImage] x264 [info]: slice I:30Avg QP:19.73 size: 26679
---[NoImage] x264 [info]: slice P:1758 Avg QP:22.45 size: 11800
---[NoImage] x264 [info]: slice B:727 Avg QP:22.80 size: 2265
---[NoImage] x264 [info]: mb I I16..4: 25.2% 44.8% 29.9%
---[NoImage] x264 [info]: mb P I16..4: 8.8% 10.8% 4.9% P16..4: 36.6% 13.3% 9.7% 0.0% 0.0%skip:15.9%
---[NoImage] x264 [info]: mb B I16..4: 0.2% 0.2% 0.1% B16..8: 27.4% 1.5% 2.1% direct: 6.1% skip:62.4% L0:38.0% L1:49.1% BI:12.8%
---[NoImage] x264 [info]: 8x8 transform intra:44.0% inter:52.8%
---[NoImage] x264 [info]: direct mvs spatial:96.7% temporal:3.3%
---[NoImage] x264 [info]: ref P L0 75.7% 9.4% 4.7% 2.0% 1.6% 1.2% 1.1% 0.9% 0.8% 0.7% 0.5% 0.3% 0.3% 0.3% 0.3% 0.3%
---[NoImage] x264 [info]: ref B L0 78.9% 8.9% 3.4% 1.8% 1.6% 0.9% 0.8% 0.5% 0.8% 0.7% 0.5% 0.3% 0.4% 0.3% 0.2%
---[NoImage] x264 [info]: ref B L1 95.8% 4.2%
---[NoImage] x264 [info]: kb/s:1768.7
---[NoImage] encoded 2515 frames, 3.52 fps, 1768.87 kb/s
--[Information] Final statistics
---[NoImage] Constant Quality Mode: Quality 20 computed...
---[NoImage] Video Bitrate Obtained (approximate): 1770 kbit/s
--[Information] [2008-7-22 6:56:43] Job completed
--[Information] [2008-7-22 6:56:43] Postprocessing
---[Information] Deleting intermediate files

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915使用--psy-rd 0 的log

--[NoImage] Job commandline: "F:\comic\media\MeGUI\tools\x264\x264.exe" --crf 20.0 --ref 16 --mixed-refs --no-fast-pskip --bframes 16 --b-pyramid --b-rdo --bime --weightb --direct auto --filter 1,1 --subme 7 --trellis 2 --partitions p8x8,b8x8,i4x4,i8x8 --8x8dct --me umh --threads auto --thread-input --aq-mode 0 --sar 1:1 --progress --no-psnr --no-ssim --output "F:\avc.mp4" "F:\avc.avs" --psy-rd 0
--[Information] [2008-7-22 7:28:06] Encoding started
--[NoImage] Standard output stream:
--[NoImage] Standard error stream
---[NoImage] avis [info]: 704x396 @ 23.98 fps (2515 frames)
---[NoImage] x264 [warning]: width or height not divisible by 16 (704x396), compression will suffer.
---[NoImage] x264 [info]: using SAR=1/1
---[NoImage] x264 [info]: using cpu capabilities: MMX2 Cache64
---[NoImage] mp4 [info]: initial delay 2002 (scale 24000)
---[NoImage] x264 [info]: slice I:30Avg QP:19.73 size: 25435
---[NoImage] x264 [info]: slice P:1758 Avg QP:22.45 size: 11150
---[NoImage] x264 [info]: slice B:727 Avg QP:22.80 size: 1997
---[NoImage] x264 [info]: mb I I16..4: 30.7% 34.7% 34.6%
---[NoImage] x264 [info]: mb P I16..4: 11.2% 12.0% 6.3% P16..4: 34.1% 12.2% 7.5% 0.0% 0.0%skip:16.7%
---[NoImage] x264 [info]: mb B I16..4: 0.3% 0.2% 0.2% B16..8: 21.8% 1.5% 1.6% direct: 5.5% skip:68.9% L0:38.1% L1:46.7% BI:15.3%
---[NoImage] x264 [info]: 8x8 transform intra:40.2% inter:49.2%
---[NoImage] x264 [info]: direct mvs spatial:97.7% temporal:2.3%
---[NoImage] x264 [info]: ref P L0 76.4% 9.1% 4.6% 1.9% 1.5% 1.2% 1.1% 0.9% 0.7% 0.7% 0.5% 0.3% 0.3% 0.3% 0.3% 0.3%
---[NoImage] x264 [info]: ref B L0 79.3% 8.5% 3.2% 1.9% 1.6% 0.9% 0.8% 0.5% 0.8% 0.7% 0.5% 0.4% 0.3% 0.3% 0.2%
---[NoImage] x264 [info]: ref B L1 96.2% 3.8%
---[NoImage] x264 [info]: kb/s:1663.9
---[NoImage] encoded 2515 frames, 3.81 fps, 1664.03 kb/s
--[Information] Final statistics
---[NoImage] Constant Quality Mode: Quality 20 computed...
---[NoImage] Video Bitrate Obtained (approximate): 1665 kbit/s
--[Information] [2008-7-22 7:39:06] Job completed
--[Information] [2008-7-22 7:39:06] Postprocessing
---[Information] Deleting intermediate files


根据测试结果 915的--psy-rd 0参数效果等于915之前的--rdcmp ssd（可能），还等高人确认。。。。

说实话 没有

关闭PsyRDO


开启PsyRDO


仔细看还是有些差异，主要在背景的细节上。据说PsyRDO本来就是锐化画面用的，细节从感官上而言有些提升。但是至于性价比如何，这个还看大家自己的理念咯。。

开启PsyRDO：
优点：细节感觉有提升。
缺点：体积直线上升，画面看起来有些脏，可能是锐化的缘故造成的。2pass用可能不错。

关闭PsyRDO：
优点：crf cq模式下体积小。画面比较干净
缺点：也许细节不如开启状态吧。


假如用crf 20+PsyRDO 来代替crf 19 不开启PsyRDO，这个方案估计也是可行的:D 体积可以保持住，细节也提升了。

颜色感觉一样啊。。用acdsee切换看没看出区别。。

http://www.fs2you.com/files/d0f54c68-57b7-11dd-81a4-0019d11a795f/

有兴趣自己下压完的视频看吧~~

引用

最初由 qyqgpower 发布
PsyRDO压滤得一干二净的tvrip没什么大用，反而可能会增加ringing

但PsyRDO能有效防止banding的发生，保留噪点等细节，压DVD、BD时非常有用

同感~

引用

最初由 52wy 发布
基本上crf21+ psy_rd1 等于 crf10+psy_rd 0的体积。

aq mode 1 也是这样啊 不过没那么夸张

我觉得aq mode 1 下设置的crf是最大值 而不是平均值了