[x264-devel] CRF and VBV

[Jason Garrett-Glaser]

On Tue, Jan 10, 2012 at 3:15 PM, Georg Lippitsch <georg at linteum.at> wrote:
> Hi,
>
> what is actually the effect of setting a CRF value when VBV is used?
>
> I want to set a maximum local bitrate and have no other limitations for
> the stream. So, can I simply set a very low CRF (let's say, 2) and set a
> VBV as I need? Or are there any disadvantages using a low CRF? If so, is
> there any way to calculate a somehow reasonable CRF from the bitrate?

VBV simply places a cap on the bitrate that results from CRF.  It does
what you think it does.

It sounds like what you want is CBR, though.

Jason