Ogg

The Ogg transport bitstream is designed to provide framing, error protection and seeking structure for higher-level codec streams that consist of raw, unencapsulated data packets, such as the Vorbis audio codec or Theora video codec.

Design constraints for Ogg bitstreams

• True streaming; we must not need to seek to build a 100% complete bitstream.
• Use no more than approximately 1-2% of bitstream bandwidth for packet boundary marking, high-level framing, sync and seeking.
• Specification of absolute position within the original sample stream.
• Simple mechanism to ease limited editing, such as a simplified concatenation mechanism.
• Detection of corruption, recapture after error and direct, random access to data at arbitrary positions in the bitstream.

Projects using Ogg

• Vorbis
• Theora
• FLAC
• Speex
• Icecast
• Ogg_Skeleton
• CMML & Annodex
• Writ

Development Libraries

The Ogg encapsulation format can be handled with the following libraries:

• libogg: libogg svn (C, cross-platform) Low-level Ogg parsing and writing.
• liboggz: liboggz svn or liboggz (C, cross-platform) liboggz wraps libogg and provides features such as seeking.
• the Ogg Directshow filters: see illiminable (C++, Win32)
• HOgg (Haskell)

External links

• Ogg documentation
• Ogg RFC