Hi,

Setting to 1000 for Keyframe minimum and maximum, might give us crash in encoding as libaom is having bug on two-pass on certain clips

CF: https://bugs.chromium.org/p/aomedia/issues/detail?id=2984

Secondly, setting auto-alt-ref >1 is deprecated since 2018, we could also remove that and keep to 1
https://aomedia-review.googlesource.com/c/aom/+/68381