Feature Request AV1

[Kuzon]

Most of the setting i use are personal preference and have a rare use case
--superres-mode
--keyint
--chroma-u-dc-qindex-offset
--chroma-u-ac-qindex-offset
--chroma-v-dc-qindex-offset
--chroma-v-ac-qindex-offset
--enable-qm
--qm-max
--qm-min

Sorry for the trouble