tree 97eb3ee3aa584c571d1974e51a07782f9a1f7570
parent 45f32c8e97a49447b9d8baff40de736a60e7405b
author Wan-Teh Chang <wtc@google.com> 1653081490 -0700
committer Wan-Teh Chang <wtc@google.com> 1653337921 -0700

Set libaom-specific option -a tune=ssim by default

Note that we have recommended setting -a tune=ssim only for high quality
levels. This pull request sets -a tune=ssim by default for all quality
levels, because we have not determined empirically the quality level
above which -a tune=ssim is better than -a tune=psnr. Also, it is easier
to understand the default value of an option if it is independent of
other options.

Part of https://github.com/AOMediaCodec/libavif/issues/955.