[x264-devel] Re: how does the qscale estimation works?

[shauli rozen]

I guess I did some mistakes , as I see it now the x264_rc_analyse_slice ,
returns cost in terms
of SAM or something like that and not bits , am I correct now?

thanks again , and sorry for the "overflow"



On 12/21/05, shauli rozen <shauli.rozen at gmail.com> wrote:
>
> Hi all . I am digging into the code and need some help :)
>
> I am trying to figure out the way the x264 estimate the next qscale to
> use.
> in the function rate_estimate_qscale ,  the variable last_satd is set
> using : x264_rc_analyse_slice , and the
> result seems to be estimated number of bits to encode the residual of the
> frame.
>
> Am I correct?
> Also I would really appreciate any knowledge of the
> way  x264_rc_analyse_slice works , how does it estimate
> bit usage without knowing the qscale that will be used for the frame?
>
> thanks a head
>
>
>
>
>
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