O Ogg Vorbis do vídeo.
Contribuído por scorpio em 02-11-02 19:58
do departamento multimedia
News jazzy escreve "O Ogg Theora, da Xiph.org Foundation pretende concorrer com os codecs MPEG-4/DivX, Real, Windows Media e similares.

Aparentemente o Ogg Theora colide com um outro projecto da Xiph, o projecto Tarkin. No entanto o Tarkin é apenas conceptual - usa uma nova técnica de compressão baseada em wavelets ( o mesmo do jpeg2000) - e está ainda longe de dar frutos.

Pelo contrário o Ogg Theora é baseado num codec comercial da On2 já existente e pretende dar qualquer coisa ao mundo em meados de 2003. "
Q: What is Theora?

A: Theora is Xiph.Org's first publicly released video codec, intended for use within the Ogg's project's Ogg multimedia streaming system. Theora is derived directly from On2's VP3 codec; Currently the two are nearly identical, varying only in framing headers, but Theora will diverge and improve from the main VP3 development lineage as time progresses.


Q: Isn't vp3 a patented technology?

A: Yes, some portions of the vp3 codec are covered by patents. However, the Xiph.org Foundation has negotiated an irrevocable free license to the vp3 codec for any purpose imaginable on behalf of the public. It is legal to use vp3 in any way you see fit (unless, of course, you're doing something illegal with it in your particular jurisdiction). You are free to download vp3, use it free of charge, implement it in a for-sale product, implement it in a free product, make changes to the source and distribute those changes, or print the source code out and wallpaper your spare room with it.


Q: What if Xiph.org and On2 decide to break off their agreement?

A: Because Theora is an Open Source project, the source code will continue to be available and development will continue. Users will still be protected from the On2 patents.

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