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List:       theora
Subject:    Re: [theora] [theora-dev] two-passes in thusnelda
From:       Zik Zak <zikzakfr () gmail ! com>
Date:       2009-08-09 19:58:08
Message-ID: 3b5d79450908091258q1481dee9w964e6516dd979a35 () mail ! gmail ! com
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On Sun, Aug 9, 2009 at 8:05 PM, rastersoft <raster@rastersoft.com> wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Zik Zak escribi=F3:
> > Hi,
>
> Hi Zik Zak:
>
> > Yes you have to use the -V  switch, and you can also use the -v switch =
to
> > specify a minimum quality at the same time.
>
> Does that mean that -V specifies the average bitrate, and -v specifies,
> in some way, the minimum bitrate?


Hi,

I'm only an enduser of the codec so I can't be sure about the technical
stuff.
From my point of view -v is used for a minimum quality, depending of the
scene and teh statistics gathered by the first pass.
The encoder will most likely select  in the first pass data a -v setting
(quantisation matrix ?) to finally have an average bitrate that matches -V.

So we both agree on this vision.

If the developpers could confirm how it is supposed to work :D ?

Regards
--
ZikZak

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<br><br><div class="gmail_quote">On Sun, Aug 9, 2009 at 8:05 PM, rastersoft <span \
dir="ltr">&lt;<a href="mailto:raster@rastersoft.com">raster@rastersoft.com</a>&gt;</span> \
wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, \
204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div class="im">-----BEGIN PGP \
                SIGNED MESSAGE-----<br>
Hash: SHA1<br>
<br>
</div>Zik Zak escribió:<br>
&gt; Hi,<br>
<br>
Hi Zik Zak:<br>
<div class="im"><br>
&gt; Yes you have to use the -V  switch, and you can also use the -v switch to<br>
&gt; specify a minimum quality at the same time.<br>
<br>
</div>Does that mean that -V specifies the average bitrate, and -v specifies,<br>
in some way, the minimum bitrate?</blockquote><div><br>Hi,<br><br>I&#39;m only an \
enduser of the codec so I can&#39;t be sure about the technical stuff.<br>From my \
point of view -v is used for a minimum quality, depending of the scene and teh \
statistics gathered by the first pass.<br> The encoder will most likely select  in \
the first pass data a -v setting (quantisation matrix ?) to finally have an average \
bitrate that matches -V.<br><br>So we both agree on this vision.<br><br>If the \
developpers could confirm how it is supposed to work :D ?<br> \
<br>Regards<br>--<br>ZikZak<br></div></div>



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