[x264-devel] Theora Ahead of H.264 In Objective PSNR Quality

[Jason Garrett-Glaser]

On Fri, May 8, 2009 at 3:32 AM, James Darnley <james.darnley at gmail.com> wrote:
> 2009/5/8 Jason Garrett-Glaser <darkshikari at gmail.com>:
>> On Thu, May 7, 2009 at 7:25 PM, Jason Garrett-Glaser
>> <darkshikari at gmail.com> wrote:
>>> On Thu, May 7, 2009 at 6:30 PM, Jason Martens <cacepi at gmail.com> wrote:
>>>> From Slashdot:
>>>>
>>>> http://tech.slashdot.org/article.pl?sid=09/05/07/2352203
>>>>
>>>> Let the debunking begin!
>>>
>>> Apparently they seem to have used catastrophically bad settings for
>>> encoding.  I'm going to guess they just encoded idiotically with
>>> ffmpeg without using any presets, thus using ffmpeg's quite broken
>>> defaults.  I suspect this is entirely intentional.
>>>
>>> It isn't worth spending time "debunking" though; anyone dumb enough to
>>> actually believe such a thing deserves the godawful quality Theora
>>> will give them.  And when they get that godawful quality, if they are
>>> still dumb enough to not realize they've been scammed by Xiph, they
>>> deserve every last bit of suffering they will experience.
>>>
>>> Dark Shikari
>>>
>>
>> And it turns out the problem was a bug in ffmpeg when writing the y4m
>> file prior to PSNR measurement, cutting a nice 4db off of x264's
>> score.
>>
>> I cannot stop laughing at this.
>>
>> Dark Shikari
>
> Perhaps I should point out this post (almost certainly) made by the
> gmaxwell_ character you were discussing it with on #x264.
> http://tech.slashdot.org/comments.pl?sid=1226313&cid=27871325
> You may want to rebuff his comment "The results are real".  He also
> links to a reddit page which I haven't taken a look at yet.

I'm not going to stoop to posting on slashdot.  He said he was going
to get the results fixed, which is all that really matters.

Dark Shikari