theora video codec reference implementation
Vorbis audio compression reference implementation
Official Opus low-latency codec repository
aom tree used in rav1e submodule
A digital audio post-processing, restoration, filtering and mixdown tool.
A library and tools for working with Ogg encapsulation, with support for seeking, chopping and validation. http://www.xiph.org/oggz/
Ogg media container reference implementation