最初由 vempx 发布
crf18的数据：
x264 [info]: slice I:29 Avg QP:17.14 size: 8674 PSNR Mean Y:52.91 U:55.86 V:57.35 Avg:53.52 Global:50.69
x264 [info]: slice P:966 Avg QP:19.66 size: 14535 PSNR Mean Y:46.61 U:48.76 V:48.89 Avg:47.17 Global:46.21
x264 [info]: slice B:1160 Avg QP:21.24 size: 4483 PSNR Mean Y:45.82 U:48.35 V:48.55 Avg:46.47 Global:45.44
x264 [info]: SSIM Mean Y:0.9875667
x264 [info]: PSNR Mean Y:46.271 U:48.635 V:48.822 Avg:46.879 Global:45.813 kb/s:
1734.89
crf18+2pass码率的数据：
x264 [info]: slice I:28 Avg QP:16.21 size: 9206 PSNR Mean Y:53.07 U:55.98 V:57.49 Avg:53.68 Global:50.55
x264 [info]: slice P:969 Avg QP:19.69 size: 14512 PSNR Mean Y:46.67 U:48.77 V:48.91 Avg:47.22 Global:46.29
x264 [info]: slice B:1158 Avg QP:21.10 size: 4502 PSNR Mean Y:45.89 U:48.35 V:48.56 Avg:46.53 Global:45.50
x264 [info]: SSIM Mean Y:0.9875803
x264 [info]: PSNR Mean Y:46.334 U:48.639 V:48.836 Avg:46.932 Global:45.880 kb/s:
1738.54
好像PSNR和SSIM都有不同程度的提升……