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Format Description Properties
• ID: fdd000026
• Short name: Ogg
• Content categories: sound, video
• Format category: file format
• Last significant update: 2004-05-27
Identification and description
| Full name | Ogg File Format |
| Description | Wrapper format for Vorbis sound data and various other multimedia bitstreams developed by the Xiph open source project. Ogg is called a "container" at http://wiki.xiph.org/CategoryTodo, part of the Xiph development site. |
| Production phase | Generally final-state for delivery to endusers. |
| Relationship to other formats | |
| Supertype of | Ogg_Vorbis, file with specific audio codec |
| Supertype of | Other file types containing specific audio or video codecs |
| May contain | Vorbis audio codec |
| May contain | Other sound codecs, e.g. Speex speech codec, and FLAC (Free Lossless Audio Codec), not documented here |
| May contain | Theora video codec, not documented here |
Local use
| LC experience or existing holdings | None |
| LC preference | General preference for recorded sound is WAVE_LCPM. For compressed sound, AAC_M4A or MP3_FF are preferred. |
Sustainability factors
| Disclosure | Fully documented. Developed as an open source project managed at Xiph.org |
| Documentation | See http://www.xiph.org/ogg/vorbis/doc/, and Useful references below. |
| Adoption | See Ogg_Vorbis. |
| Licensing and patent claims | None. |
| Transparency | Transparent wrapper. Transparency of bitstreams varies; for example, see Vorbis. |
| Self-documentation | Not investigated by compilers of this document; the format does appear to include internal headers and identifiers. |
| External dependencies | None |
| Technical protection considerations | None known to the compilers of this document. |
Quality and functionality factors
| Normal rendering | Not applicable |
| Clarity (support for high image resolution) | Not applicable |
| Fidelity (support for high audio resolution) | Not applicable |
| Support for multiple sound channels | Not applicable |
| Support for downloadable or user-defined sounds, samples, and patches | Not applicable |
| Functionality beyond normal rendering | Some streaming applications, not investigated at this time. |
File type signifiers
Notes
| General | |
| History | The About Xiph page (dated 1999 and signed by "Monty") presents a strong editorial statement in favor of open source approaches to networked information and against unwarranted corporate hegemony over music, performance, and the Internet. |
Format specifications
URLs
• Xiph documentation menu (http://www.xiph.org/ogg/vorbis/doc/)
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Useful references
URLs
• http://www.xiph.org/ogg/vorbis/doc/vorbis-ogg.html
• http://www.xiph.org/ogg/vorbis/doc/oggstream.html
• http://www.xiph.org/ogg/vorbis/doc/framing.html
• http://wiki.xiph.org/CategoryTodo
• The File Extension Source (http://filext.com/)
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Last updated Monday, 06-Mar-2006 07:38:52 EST
