[BlackSharkfr]

Alright I just did a new encoding test with the latest x264 version from x264.nl (rev1884) and my usual stereoscopic source and... the CRF quality difference is gone, both streams look almost identical so that is good, there is just one problem : I get no bitrate gain at all.
I used dfault options, just with frame-packing 5. Would there be any particular option I should enable that could trigger the huge bandwidth gains DarkShikari got in his test last month ?

There is still that little thing with the picture I can't really describe, some parts are just as sharp on both encodings but some very specific parts seem a little blurred, it's like the psy-opts would prioritize different parts of the picture in some very specific conditions.

C:\Users\BlackShark>C:\Users\BlackShark\...\x264_1884.exe --crf 21 --frame-packing 5 --psnr --ssim -o 1884-crf21-frameseq
C:\Users\...\Video-frameseq.avs
avs [info]: 1920x1080p 0:0 @ 20000000/333333 fps (cfr)
x264 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2
x264 [info]: profile High, level 4.2
x264 [info]: frame I:62 Avg QP:18.60 size: 91066 PSNR Mean Y:47.72 U:54.71 V:55.53 Avg:48.94 Global:47.10
x264 [info]: frame P:4380 Avg QP:22.30 size: 36151 PSNR Mean Y:45.47 U:53.94 V:54.93 Avg:46.77 Global:44.74
x264 [info]: frame B:2950 Avg QP:24.34 size: 25199 PSNR Mean Y:47.94 U:58.00 V:58.97 Avg:49.20 Global:43.66
x264 [info]: consecutive B-frames: 30.8% 47.6% 1.1% 20.5%
x264 [info]: mb I I16..4: 22.1% 63.1% 14.7%
x264 [info]: mb P I16..4: 4.2% 9.1% 0.9% P16..4: 40.9% 11.6% 5.7% 0.0% 0.0% skip:27.6%
x264 [info]: mb B I16..4: 3.1% 3.5% 0.3% B16..8: 32.9% 7.6% 1.3% direct: 9.3% skip:42.1% L0:47.4% L1:49.4% BI: 3.2%
x264 [info]: 8x8 transform intra:60.8% inter:73.6%
x264 [info]: coded y,uvDC,uvAC intra: 41.3% 40.8% 6.5% inter: 28.2% 20.0% 0.3%
x264 [info]: i16 v,h,dc,p: 34% 34% 8% 25%
x264 [info]: i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 10% 24% 30% 4% 6% 4% 11% 3% 8%
x264 [info]: i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 13% 33% 18% 4% 7% 5% 10% 3% 6%
x264 [info]: i8c dc,h,v,p: 61% 24% 11% 4%
x264 [info]: Weighted P-Frames: Y:19.5% UV:7.8%
x264 [info]: ref P L0: 63.6% 13.4% 16.8% 5.6% 0.6%
x264 [info]: ref B L0: 75.1% 24.5% 0.4%
x264 [info]: ref B L1: 97.6% 2.4%
x264 [info]: SSIM Mean Y:0.9771880 (16.418db)
x264 [info]: PSNR Mean Y:46.472 U:55.568 V:56.544 Avg:47.758 Global:44.289 kb/s:15475.64

encoded 7392 frames, 9.00 fps, 15475.64 kb/s

C:\Users\BlackShark>C:\Users\BlackShark\...\x264_1884.exe --crf 21 --frame-packing 3 --psnr --ssim -o 1884-crf21-SBSfull C:\Users\BlackShark\...\Video-SBSFull.avs
avs [info]: 3840x1080p 0:0 @ 10000000/333333 fps (cfr)
x264 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2
x264 [info]: profile High, level 5.0
x264 [info]: frame I:28 Avg QP:18.26 size:194588 PSNR Mean Y:48.91 U:56.39 V:57.15 Avg:50.12 Global:47.25
x264 [info]: frame P:2307 Avg QP:22.49 size: 84652 PSNR Mean Y:45.08 U:53.36 V:54.38 Avg:46.37 Global:44.59
x264 [info]: frame B:1361 Avg QP:24.47 size: 24946 PSNR Mean Y:49.00 U:59.16 V:60.16 Avg:50.25 Global:44.35
x264 [info]: consecutive B-frames: 41.2% 25.8% 9.7% 23.3%
x264 [info]: mb I I16..4: 21.2% 63.4% 15.4%
x264 [info]: mb P I16..4: 6.2% 14.9% 1.5% P16..4: 39.2% 12.4% 5.1% 0.0% 0.0% skip:20.7%
x264 [info]: mb B I16..4: 0.4% 0.7% 0.1% B16..8: 33.3% 3.6% 0.7% direct: 1.9% skip:59.4% L0:41.5% L1:52.8% BI: 5.7%
x264 [info]: 8x8 transform intra:65.4% inter:76.8%
x264 [info]: coded y,uvDC,uvAC intra: 46.9% 41.5% 6.8% inter: 22.1% 19.2% 0.3%
x264 [info]: i16 v,h,dc,p: 30% 35% 7% 28%
x264 [info]: i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 10% 25% 27% 5% 6% 4% 11% 3% 8%
x264 [info]: i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 12% 35% 17% 4% 7% 5% 11% 3% 6%
x264 [info]: i8c dc,h,v,p: 60% 25% 12% 4%
x264 [info]: Weighted P-Frames: Y:17.1% UV:10.0%
x264 [info]: ref P L0: 67.9% 17.8% 10.3% 3.7% 0.2%
x264 [info]: ref B L0: 91.0% 8.1% 0.9%
x264 [info]: ref B L1: 95.7% 4.3%
x264 [info]: SSIM Mean Y:0.9781515 (16.606db)
x264 [info]: PSNR Mean Y:46.552 U:55.522 V:56.529 Avg:47.830 Global:44.517 kb/s:15239.71

encoded 3696 frames, 4.38 fps, 15239.71 kb/s