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____/ ZnU on Friday 26 Feb 2010 05:57 : \____
> In article <4350605.bGJ8BuQJad@xxxxxxxxxxxxxxx>,
> Roy Schestowitz <newsgroups@xxxxxxxxxxxxxxx> wrote:
>
>> > Conclusion: Even at less than half the bitrate of H.264, Theora is very
>> > close to the same quality. There are some more noticeable artefacts,
>> > but it seems to have better motion compensation, and of course a much
>> > smaller file size. Pushing the rate to 700 or 800 Kb/s would bring the
>> > two even closer still (will keep testing).
>>
>> I opened these in Kaffeine/xine before even looking at the file sizes or the
>> rest of your
>> message (just quick CLI copy and paste). I could sense that ogv was slightly
>> less crisp than
>> the mpg, but I knew nothing about the file sizes (until I read your message).
>>
>> I convert a lot of YouTube videos to Ogg for my site and it typically cuts
>> the size in
>> half without noticeable degradation in quality.
>>
>> Sometimes freer it also better.
>
> The original source footage here is not especially crisp, is fairly
> low-motion, and doesn't contain critical high-resolution detail like
> text. The bit rates used are also quite comfortably high for video with
> these characteristics (for either codec).
>
> Combine unchallenging conditions and pass/fail grading, and the results
> of this test tell us essentially nothing about the actual relative
> strengths of the codecs. It's like taking a couple of math majors,
> giving them a third grade math test, and then declaring there can't be
> much difference between them because they both get passing grades.
Ars Technica has just published another benchmark:
http://arstechnica.com/open-source/news/2010/02/ogg-theora-vs-h264-head-to-head-comparisons.ars
- --
~~ Best of wishes
The folks on the Ubuntu CD cover need to apt-get shirt, not sudo fsck.
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