[x264-devel] question regading encoded keyframe size at 720p

[Henrik Gramner]

On Thu, Oct 15, 2015 at 7:35 PM, Carl Petersen <cpetersen at broadsoft.com> wrote:
> Thanks. Makes sense.
>
> If I set f_rf_constant_max, I can reduce keyframe size to honour a smaller
> vbv. If that is not set, how much is quality allowed to be reduced to try to
> honour vbv?
>
> In other words, in there a concept of a default value for f_rf_constant_max?

VBV is by default allowed to reduce the quality as much as necessary
to hit the target.