atm. x264 defines --tune animation like this:
Quote:
- animation (psy tuning):
--bframes {+2} --deblock 1:1
--psy-rd 0.4:<unset> --aq-strength 0.6
--ref {Double if >1 else 1}
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source: x264 --fullhelp
-> you if you apply this multiple times b-frames and ref will increase