tree 6a3f8660d01702f7fffa88ddd9fcec2bdc2f0766
parent 14a0294b28a3e373e487324e63859c4f4c180bf6
author Sai Deng <sdeng@google.com> 1598900769 -0700
committer Sai Deng <sdeng@google.com> 1598997404 +0000

Add tune=vmaf_neg mode

Use the adaptive video pre-processing method together with VMAF based RDO
multiplier scaling and QP adjustment.

               avg_psnr   ssim    vmaf   vmaf_neg
lowres_bd10    12.804    5.381  -20.251   -8.154
midres_bd10    11.517    6.221  -21.000   -7.722
midres         12.095    8.089  -16.744   -6.106
hdres          11.036    7.410  -20.237   -7.762

1.8% VMAF_NEG gains comparing to the method using fixed pre-processing
strength.

Change-Id: Ie4bc57ea70cab5eb7622cbefec5cc877e150757a