Charles schrieb: > AVC is a standard under both the ITU-T Video Coding Experts Group (VCEG) > and ISO/IEC Moving Picture Experts Group (MPEG).
Right, but of course neither VCEG nor ISO/IEC have a monopoly on setting standards. > > Also, AVC is a de-facto standard. Every iPod supports it. Every PSP > supports it. Every HD-DVD and Blu-Ray player supports it. The mobile > ecosystem has long since adopted MPEG-4, and most video services either > use AVC now or are on track to. Even Adobe, who’s had lots of success to > this point with proprietary formats, has finally adopted it a > replacement of VP6. AVC *is* successful in its field. The Ogg codecs are successful in their field (royality free codecs). Both are pretty "standard" depending on what point of view one has. > Comparing apples-to-apples, Ogg Theora isn’t a standard. It /was/ a > proprietary On2 video codec, and it didn’t become a standard just > because On2 gave everyone a royalty-free license, so you can see how > some people might still think of it as proprietary. The fact that it’s > open-source isn’t relevant, since of course there are open-source > implementations of AVC as well. It's a standard because it has a public spec and because an organization issues those spec. A neutral non-profit organization I should say, which may not mean much to a corporate environment but is adding to the acceptance level in other environments. > It was already old technology when On2 > gave it away, so it’s MPEG-1-like inefficiency makes it retro (to put it > kindly) on the PC, and completely unsuitable for typicaly 3G mobile > throughput. Putting the Theora bitstream into the same efficiency class as MPEG-1 is pretty questionable and I'm inclined to say your statement is wrong. I also doubt the "completely unsuitable" for 3G throughput statement as you don't even give specific requirements. Having said that even H.264 can be considered "old technology", albeit it *is* more sophisticated than Theora, albeit I'd assume that e.g. on profiles used on mobile phones it wouldn't even be able to take advantage of all of its coding schemes. Maik
