[MEncoder-users] x264: vbv bufsize

Loren Merritt lorenm at u.washington.edu
Sat Dec 8 01:10:50 CET 2007

On Fri, 7 Dec 2007, Nicolas Hesler wrote:
> Thanks.  That clears that up.  But how do you set min and max bitrate on
> a variable bitrate encode with x264?

vbv_maxrate is maxrate. You can't specify minimum bitrate, because there 
aren't any situations in which a minimum bitrate is appropriate. If 
maxrate > avgrate, why wouldn't you want easy scenes to compress as much 
as possible and leave more bits for the hard scenes? If maxrate == avgrate,
then the encoder must use constant bitrate in order to satisfy both 
constraints, so there's no need to separately specify minrate.

--Loren Merritt

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