ネタに対抗してみた

x264

200Passに対抗しようと適当に512x384でエンコードした．
オプション付けすぎて2-passに7時間かかりました…orz
オプションはこんな感じ

--progress --min-keyint 1 --b-pyramid --bime --weightb --trellis 2
--mixed-refs --bitrate 700 --scenecut 65 --8x8dct --partitions all
--bframes 16 --direct "auto" --subme 7 --b-rdo --me "tesa" --ref 5
--deblock -1:-1 --cqm "flat" --threads 1 --no-fast-pskip --no-dct-decimate
--fgo 1 --me-prepass --min-keyint 1 --keyint 300 --merange 64

相変わらず狂気のオプション．
で，結果はこんな感じ．
===
注：あっちの数値は"800x600"でのエンコード結果なのかもしれません．
その場合，こちらの検証は無意味な物になりますのでご注意下さい（調査中）

SSIMとPSNRだけを抜き出して表にするとこんな感じ

Pass SSIM PSNR(Y) PSNR(U) PSNR(V) PSNR(Avg) PSNR(Global) Bitrate
1Pass 0.9796792 43.917 46.584 46.367 44.442 42.429 679.34
2Pass 0.9816183 44.177 46.678 46.467 44.682 43.184 700.92
参考(200Pass) 0.9820838 43.956 46.322 46.092 44.501 41.624 700.58

200PassよりもSSIMは若干低く、PSNRでは2-passの方が上回っている．
詳細なエンコード結果は以下を参照．
1-pass目:

x264 [info]: slice I:88 Avg QP:22.59 size: 5816 PSNR Mean Y:53.90 U:71.63 V:70.65 Avg:54.66 Global:48.27
x264 [info]: slice P:3576 Avg QP:23.94 size: 4600 PSNR Mean Y:44.32 U:46.43 V:46.29 Avg:44.82 Global:42.84
x264 [info]: slice B:3227 Avg QP:25.47 size: 789 PSNR Mean Y:43.20 U:46.07 V:45.79 Avg:43.75 Global:41.94
x264 [info]: mb I I16..4: 63.9% 29.2% 6.8%
x264 [info]: mb P I16..4: 6.5% 6.0% 0.8% P16..4: 46.5% 11.9% 18.2% 0.1% 0.1% skip: 9.9%
x264 [info]: mb B I16..4: 0.0% 0.1% 0.0% B16..8: 40.0% 0.4% 1.8% direct: 1.3% skip:56.4%
x264 [info]: final ratefactor: 23.74
x264 [info]: 8x8 transform intra:42.8% inter:64.4%
x264 [info]: direct mvs spatial:98.8% temporal:1.2%
x264 [info]: ref P 74.5% 11.6% 6.9% 3.5% 3.5%
x264 [info]: ref B 83.8% 9.4% 5.3% 1.4%
x264 [info]: AQ Result Bright MB:39.30% QP Up:32.26% Down: 4.35%
x264 [info]: AQ Result Middle MB:50.85% QP Up: 5.24% Down:17.13%
x264 [info]: AQ Result Dark MB: 7.44% QP Up:33.78% Down: 3.29%
x264 [info]: AQ Result M.Dark MB: 2.40% QP Up:99.40% Down: 0.00%
x264 [info]: AQ change value 4:0.26% 3:0.48% 2:6.81% 1:12.70% 0:69.09% -1:8.32% -2:2.34%
x264 [info]: SSIM Mean Y:0.9796792
x264 [info]: PSNR Mean Y:43.917 U:46.584 V:46.367 Avg:44.442 Global:42.429 kb/s:679.34
encoded 6891 frames, 0.43 fps, 679.49 kb/s

2-pass目:

x264 [info]: slice I:88 Avg QP:21.86 size: 5765 PSNR Mean Y:53.93 U:71.86 V:70.85 Avg:54.78 Global:48.77
x264 [info]: slice P:3576 Avg QP:24.07 size: 4674 PSNR Mean Y:44.38 U:46.40 V:46.25 Avg:44.86 Global:43.55
x264 [info]: slice B:3227 Avg QP:24.59 size: 900 PSNR Mean Y:43.68 U:46.30 V:46.04 Avg:44.21 Global:42.74
x264 [info]: mb I I16..4: 63.0% 29.8% 7.2%
x264 [info]: mb P I16..4: 7.0% 5.9% 0.8% P16..4: 44.0% 11.7% 18.3% 0.2% 0.1% skip:12.1%
x264 [info]: mb B I16..4: 0.0% 0.0% 0.0% B16..8: 41.9% 0.4% 2.1% direct: 1.5% skip:54.0%
x264 [info]: 8x8 transform intra:40.9% inter:64.4%
x264 [info]: direct mvs spatial:83.9% temporal:16.1%
x264 [info]: ref P 73.5% 11.8% 7.3% 3.6% 3.8%
x264 [info]: ref B 81.7% 11.0% 5.6% 1.7%
x264 [info]: AQ Result Bright MB:38.94% QP Up:31.37% Down: 4.45%
x264 [info]: AQ Result Middle MB:51.12% QP Up: 5.04% Down:17.32%
x264 [info]: AQ Result Dark MB: 7.51% QP Up:33.46% Down: 3.32%
x264 [info]: AQ Result M.Dark MB: 2.43% QP Up:99.39% Down: 0.00%
x264 [info]: AQ change value 4:0.26% 3:0.47% 2:6.27% 1:12.73% 0:69.44% -1:8.45% -2:2.38%
x264 [info]: SSIM Mean Y:0.9816183
x264 [info]: PSNR Mean Y:44.177 U:46.678 V:46.467 Avg:44.682 Global:43.184 kb/s:700.92
encoded 6891 frames, 0.65 fps, 701.07 kb/s