[x264-devel] Who washed my video? x264 vs x265 ‘placebo’ comparison

[zhou2090 at 126.com]

yep.

the point that we focus on is low-bitrtate. We want to found the principle of eye-perceived figure quailty.
Have you get some mathematical method or judgement indictor for this?

thanks



zhou2090 at 126.com

发件人： Ivan Pozdeev
发送时间： 2014-02-25 10:10
收件人： Mailing list for x264 developers
主题： Re: [x264-devel]Who washed my video? x264 vs x265 ‘placebo’ comparison
Of course, in this case, it was estimated "by eye" (literally)
and thus is strictly personal. The best the OP could do is point this out clearly.

There are, however, formal methods out there that make some assumptions on what
an "eye-perceived quality" is (lossy image compression algorithms are based on these).

What point are you trying to make? Do you disagree with OP's judgement?

-----Original Message-----
From: zhou2090 at 126.com <zhou2090 at 126.com>
Sent: Tuesday, February 25, 2014 5:27
To: Mailing list for x264 developers <x264-devel at videolan.org>
Cc: 
Subject: [x264-devel] Who washed my video? x264 vs x265 ‘placebo’ comparison

 
hi,
 
"Hi, I don't compare PSNR because it's inconsistent with human eye 
perception. Even the structural similarity index is not as good as human 
eyes."
 
I totoaly agree with what you say. Now I'm intersting with the method how to evaluate the human eyes quality.
 
thanks.
 


zhou2090 at 126.com
 
From: Niccolò Belli
Date: 2014-02-24 19:57
To: x264-devel
Subject: Re: [x264-devel]Who washed my video? x264 vs x265 ‘placebo’ comparison
Il 24/02/2014 07:15, chen ha scritto:
> Hi,
> I see your blog, you just compare filesize, no PSNR, SSIM and more.
 
Hi, I don't compare PSNR because it's inconsistent with human eye 
perception. Even the structural similarity index is not as good as human 
eyes.
 
> For decode speed, I think H264 optimize more than 10 years, but H265 is
> shorter time, it is not a big problem.
 
I was serious, I'm impressed by the current encoding/decoding speeds. 
Especially compared to VP9 which seems to encode using a wooden abacus 
(~1.4 minutes per frame).
 
> btw: There have some decoder double speed than ffmpeg.
> Best regards,
> Min
 
Like Mainconcept? I don't like proprietary software.
 
Niccolò
 
> At 2014-02-24 04:32:54,"Niccolò Belli" <darkbasic at linuxsystems.it> wrote:
>  >Hi,
>  >I did a quick x264 vs x265 comparison in my blog, hopefully someone
>  >will be intersted watching it:
>  >http://www.linuxsystems.it/2014/02/washed-video-x264-vs-x265-placebo-comparison/
>  >
>  >Cheers,
>  >Niccolò
-- 
http://www.linuxsystems.it
 
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