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HTML5 video element codec debate reignited

HTML5 video element codec debate reignited

Posted Feb 5, 2010 13:12 UTC (Fri) by DonDiego (guest, #24141)
In reply to: HTML5 video element codec debate reignited by Simetrical
Parent article: HTML5 video element codec debate reignited

Another correction:

> H.264 supporters claim that Theora's quality-per-bitrate performance is behind H.264's

This is not a claim but a technical fact that not even the Theora developers dispute. The question is whether or not Theora is good enough for the proposed uses and whether or not other tradeoffs make Theora preferable over H.264.


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HTML5 video element codec debate reignited

Posted Feb 5, 2010 19:00 UTC (Fri) by gmaxwell (guest, #30048) [Link]

Yes. As a format H.264 has a lot of attractive things in it and among those tools in H.264's collection is basically a superset of Theora. If your technical comparison points are only quality-per-bit and not decoder computational complexity, decoder implementation complexity, licensing, or... "Assume an ideal spherical encoder in a frictionless market" H.264 has more signal processing tools in the decoder, so it will win that kind of comparison.

Though it's important to note that what we can actually compare the quality-per-bitrate of is encoders, not formats.

Quoting Timothy Terriberry,

"There are _so_ many things you can do wrong in an encoder that do much more harm to quality than a clever optimization scheme or a complicated, patented scheme can improve it. Most encoders do some or all of them, and the original VP3 encoder was no exception. With Thusnelda we're doing things a lot smarter than we used to be, and that will only get better."

Libtheora doesn't beat the quality-per-bit of best H.264 encoders (such as x264), and won't if they also keep improving, but it does very well against some very popular ones. So thats another layer to question of 'good enough for the proposed uses and whether or not other tradeoffs make Theora preferable': "You're already using an inefficient H.264 encoder, Theora isn't worse than that. Why not use Theora and help contribute to a world without format royalties?"

YouTube Ogg/Theora comparison

Posted Feb 9, 2010 12:02 UTC (Tue) by dwmw2 (subscriber, #2063) [Link]

This comparison may be of interest.

In reference to Chris DiBona's comments on WhatWG about Theora and YouTube, it says the following:

"While different files may produce different results, the allegation made on WhatWG was so expansive that I believe a simple comparison can reliably demonstrate its falsehood.

"I do not believe Chris intended to deceive anyone, only that he is a victim of the same outdated and/or simply inaccurate information that has fooled many others.


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