<div dir="ltr">Thanks, adding "--no-mbtree" to my command line allows x264 to choose a single QP for the whole frame as reported by Elecard StreamEye Version 4.<div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Oct 19, 2016 at 3:00 AM, <span dir="ltr"><<a href="mailto:x264-devel-request@videolan.org" target="_blank">x264-devel-request@videolan.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Send x264-devel mailing list submissions to<br>
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Today's Topics:<br>
<br>
1. How can I disable Adaptive Quantization (AQ) completely?<br>
(Raul Lopez)<br>
2. Re: How can I disable Adaptive Quantization (AQ) completely?<br>
(BugMaster)<br>
<br>
<br>
------------------------------<wbr>------------------------------<wbr>----------<br>
<br>
Message: 1<br>
Date: Tue, 18 Oct 2016 17:20:46 -0700<br>
From: Raul Lopez <<a href="mailto:raulizahi@gmail.com">raulizahi@gmail.com</a>><br>
To: <a href="mailto:x264-devel@videolan.org">x264-devel@videolan.org</a><br>
Subject: [x264-devel] How can I disable Adaptive Quantization (AQ)<br>
completely?<br>
Message-ID:<br>
<CALu=<wbr>swgAtVB6Ji4kf5p9RO1rPczk=<a href="mailto:n-Wzu_PFfLNPtmkTjk9LA@mail.gmail.com">n-<wbr>Wzu_PFfLNPtmkTjk9LA@mail.<wbr>gmail.com</a>><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
Using x264 0.148.x built today, I was not able to completely disable AQ<br>
when I set "--aq-mode 0".<br>
<br>
I get a reduction in the range of QP in the Initial Intra Frame from 20-41<br>
(without the --aq-mode 0 option) to 27-36, so the parameter is doing<br>
something, but, for testing purposes, I would want to have a single QP for<br>
the whole frame that adapts to the content and is regulated by Rate Control.<br>
<br>
Does --aq-mode 0 not work or do I need to set any other parameter at the<br>
same time?<br>
<br>
This is my command line:<br>
<br>
x264 --preset fast --bframes 0 --bitrate 3000 --vbv-bufsize 3000<br>
--vbv-maxrate 3000 --nal-hrd cbr --fps 30 --keyint 100 --min-keyint 100<br>
--no-scenecut --aq-mode 0 --output<br>
sensor_3Mbps_CBR_VBV1Sec_IP_<wbr>GOP100_noAdaptiveQP.h264 sensor_1920x1080p30.mov<br>
<br>
Any guidance would be appreciated.<br>
<br>
Raul<br>
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Message: 2<br>
Date: Wed, 19 Oct 2016 09:34:59 +0300<br>
From: BugMaster <<a href="mailto:BugMaster@narod.ru">BugMaster@narod.ru</a>><br>
To: Mailing list for x264 developers <<a href="mailto:x264-devel@videolan.org">x264-devel@videolan.org</a>><br>
Subject: Re: [x264-devel] How can I disable Adaptive Quantization (AQ)<br>
completely?<br>
Message-ID: <<a href="mailto:1277560981.20161019093459@narod.ru">1277560981.20161019093459@<wbr>narod.ru</a>><br>
Content-Type: text/plain; charset=utf-8<br>
<br>
On Tue, 18 Oct 2016 17:20:46 -0700, Raul Lopez wrote:<br>
> Using x264 0.148.x built today, I was not able to completely<br>
> disable AQ when I set "--aq-mode 0".<br>
<br>
> I get a reduction in the range of QP in the Initial Intra Frame<br>
> from 20-41 (without the --aq-mode 0 option) to 27-36, so the<br>
> parameter is doing something, but, for testing purposes, I would<br>
> want to have a single QP for the whole frame that adapts to the<br>
> content and is regulated by Rate Control.<br>
<br>
> Does --aq-mode 0 not work or do I need to set any other parameter at the same time?<br>
<br>
> This is my command line:<br>
<br>
> x264 --preset fast --bframes 0 --bitrate 3000 --vbv-bufsize 3000<br>
> --vbv-maxrate 3000 --nal-hrd cbr --fps 30 --keyint 100 --min-keyint<br>
> 100 --no-scenecut --aq-mode 0 --output<br>
> sensor_3Mbps_CBR_VBV1Sec_IP_<wbr>GOP100_noAdaptiveQP.h264 sensor_1920x1080p30.mov<br>
<br>
> Any guidance would be appreciated.<br>
<br>
> Raul <br>
<br>
Hi. "--aq-mode 0" disables AQ only but there other algorithms that<br>
change QP at macroblock level like MBTree and VBV (row level). So if<br>
you really want only single QP for full frame than you need to disable<br>
them also i.e. --no-mbtree and don't use vbv options.<br>
<br>
<br>
<br>
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