The libtheora reference implementation provides the standard encoder and decoder under a BSD license. The libtheora implementation depends on the following libraries... You may also be interesting in testing our unstable releases toward libtheora 1.2. Cortado homepage. list of Theora encoders Theora players.

Theora was Xiph.Org's first publicly released video codec, intended for use within the Foundation's Ogg multimedia streaming system. Theora is derived directly from On2's VP3 codec, adds new features while allowing it a longer useful lifetime.

Theora是由On2 Technologies公司專屬的VP3編碼器，經過開放原始碼後衍生而來，目標是達成比MPEG-4 Part 2更好的編碼效率。 Theora的命名來自於一個電視節目Max Headroom中的角色：Theora Jones [ 7 ] 。

2025年3月19日 · libtheora 1.2 测试版提供了更好的 ARM 支持、对 RISC OS 的初始支持、对 MinGW构建的修复、各种性能改进以及代码质量提升。 此外，还有一些构建系统修复和其他改动。

2025年3月18日 · Theora 是 Xiph.Org 发布的第一款用于 Ogg 的视频编解码器。 Theora 最初基于 VP3 编解码器。 libtheora 1.0 参考软件实现发布至今已超过 16 年，本周发布的是 libtheora 1.2 测试版。 除了 2023 年 Google Chrome 浏览器放弃支持，以及 Firefox 的跟进之外，Theora 已经多年没有太多话题。

4 天之前 · 本月初，Theora 1.2 beta 版发布，距 Theora 的 libtheora 1.0 版发布已有 16 年，该视频编解码器由 Xiph.Org 设计，用于 Ogg 音频。Theora 源自现在相当古老的 VP3 视频编解码器，但对于那些继续享受 Theora 格式内容的人来说，3月29日推出了 1.2 版库...

Theora is a free and open video compression format from the Xiph.org Foundation. Like all our multimedia technology it can be used to distribute film and video online and on disc without the licensing and royalty fees or vendor lock-in associated with other formats.

6 天之前 · The Theora 1.2 library update brings better ARM support, initial RISC OS support, various library changes, MinGW build fixes, performance improvements, and other code clean-ups/enhancements over the past many years. Those interested in the Theora 1.2 libtheora release can grab it via the Xiph.Org GitLab.

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. Why use Theora? It's open and free. Have a look at the Theora benefits section for further information. Q.

Theora's predecessor On2 TrueMotion VP3 was originally a proprietary and patent-encumbered video codec developed by On2 Technologies.VP3.1 was introduced in May 2000 [14] and followed three months later by the VP3.2 release, [15] which was the basis for Theora.