MIME Types and File Extensions

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WARNING: this page is under development and discussion - none of this are currently official Xiph recommendations.

.ogg - application/ogg

can contain any logical bitstreams multiplexed together in an ogg container
has been defined as such in RFC 3534 http://www.ietf.org/rfc/rfc3534.txt
.ogg has traditionally been used for Ogg Vorbis files, so an important subpart of the ".ogg" files will be just Ogg Vorbis
.ogg has more recently also been used for Ogg FLAC and for Ogg Theora
it is recommended that random multitrack files contain a skeleton track to identify all containing logical bitstreams

.oga - audio/ogg

audio in Ogg
- Vorbis, Speex, FLAC, Ghost, OggPCM

.ogv - video/ogg

a/v in Ogg
- Theora, Theora + Vorbis, Theora + Speex, Theora + FLAC, Dirac + Vorbis, MNG + FLAC, Tarkin, OggUVS

.spx - audio/ogg+speex

.spx has traditionally been used for Ogg Speex files and should be considered for backwards-compatibility

Codec MIME types

Codecs need their own MIME types for streaming and to be used in multitrack ogg files using skeleton:

audio/vorbis for Vorbis without container
video/theora for Theora without container
audio/speex for Speex without container
audio/flac for FLAC (is audio/flac currently being used for flac in native container?)