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<font face="Arial">One basic question...<br>
<br>
Does the scene cut detection is used to support variable size GOP, or
to speed up the encoding process (like mode decision)?<br>
<br>
By the way, where can I find the brief description of the scene cut
detection algorithm in x264? Thanks<br>
</font>
<blockquote cite="mid4680C3A2.3050604@joost.com" type="cite">
<pre wrap="">Loren Merritt a écrit :
</pre>
<blockquote type="cite">
<pre wrap="">And what content was that (or any other sample that the patch helped)?
</pre>
</blockquote>
<pre wrap=""><!---->
It was a musical content (RHCP)
Some other tests:
*T3 trailer
before:
x264 [info]: SSIM Mean Y:0.9286776
x264 [info]: PSNR Mean Y:37.972 U:41.085 V:41.541 Avg:38.698 Global:35.166
after:
x264 [info]: SSIM Mean Y:0.9282334
x264 [info]: PSNR Mean Y:38.133 U:41.241 V:41.753 Avg:38.861 Global:35.137
(does this count as a positive or a negative result?)
*CSI trailer
before:
x264 [info]: SSIM Mean Y:0.9096916
x264 [info]: PSNR Mean Y:34.967 U:39.457 V:39.828 Avg:35.941 Global:34.465
after:
x264 [info]: SSIM Mean Y:0.9100573
x264 [info]: PSNR Mean Y:35.142 U:39.614 V:40.032 Avg:36.114 Global:34.463
*Final Fantasy trailer
before:
x264 [info]: SSIM Mean Y:0.9479361
x264 [info]: PSNR Mean Y:42.540 U:46.955 V:48.034 Avg:43.486 Global:39.432
after:
x264 [info]: SSIM Mean Y:0.9477924
x264 [info]: PSNR Mean Y:42.584 U:47.030 V:48.109 Avg:43.530 Global:39.415
*M&M's advert
before:
x264 [info]: SSIM Mean Y:0.8675424
x264 [info]: PSNR Mean Y:29.512 U:34.251 V:33.833 Avg:30.425 Global:29.224
after:
x264 [info]: SSIM Mean Y:0.8671178
x264 [info]: PSNR Mean Y:29.801 U:34.435 V:33.921 Avg:30.669 Global:29.218
</pre>
<blockquote type="cite">
<pre wrap="">All of my test videos lose quality-per-bitrate with the patch. Not much
(-.01 dB), but very consistent.
</pre>
</blockquote>
<pre wrap=""><!---->
I'm going to have another look at it, as I noticed that it goes wrong in
fades to/from black/white.
--
Gabriel
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</pre>
</blockquote>
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