aom: fix bad option range and improve UX with choice list
- There are four enum variants corresponding to
--sout-aom-rc-end-usage
so the range should be{0,3}
not{0,4}
. - Better UX is given by
--sout-aom-rc-end-usage
and--sout-aom-usage
having choice lists.
Reviewers, please help pick suitable new labels if what I have used is insufficient.
Edited by Lyndon Brown