MIME Types and File Extensions: Difference between revisions
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(→.ogv - video/ogg: may contain skeleton, cmml) |
(reflecting outcome of today's xiph meeting) |
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STATUS: final editing before being turned into an official Xiph recommendation and work on rfcs will start to reflect these policies | |||
== .ogx - application/ogg == | |||
* Ogg Multiplex Profile (anything in Ogg) | |||
* can contain any logical bitstreams multiplexed together in an ogg container | * can contain any logical bitstreams multiplexed together in an ogg container | ||
* | * will replace the .ogg extension from RFC 3534 http://www.ietf.org/rfc/rfc3534.txt | ||
* random multitrack files SHOULD contain a skeleton track to identify all containing logical bitstreams | * random multitrack files SHOULD contain a skeleton track to identify all containing logical bitstreams | ||
* apps that identify a logical bitstream which they cannot decode SHOULD drop but MAY still decode the ones they can | * apps that identify a logical bitstream which they cannot decode SHOULD drop but MAY still decode the ones they can | ||
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== .oga - audio/ogg == | == .oga - audio/ogg == | ||
* audio in Ogg | * Ogg Audio Profile (audio in Ogg container) | ||
** Vorbis, Speex, FLAC, Ghost, OggPCM | * apps supporting .oga, .ogv SHOULD support decoding from muxed Ogg streams | ||
* covers Vorbis, Speex, FLAC, Ghost, OggPCM inside Ogg, though Ogg Vorbis and Ogg Speex also have special profiles | |||
* May contain Ogg Skeleton and/or CMML logical bitstreams. | |||
RATIONALE: This distinguishes audio-only files, using any of the Xiph audio codecs, from Ogg Vorbis I files (traditional .ogg) which may not contain more than one logical bitstream. | RATIONALE: This distinguishes audio-only files, using any of the Xiph audio codecs, from Ogg Vorbis I files (traditional .ogg) which may not contain more than one logical bitstream. | ||
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== .ogv - video/ogg == | == .ogv - video/ogg == | ||
* a/v in Ogg | * Ogg Video Profile (a/v in Ogg container) | ||
** Theora, Theora + Vorbis, Theora + Speex, Theora + FLAC, Dirac + Vorbis, MNG + FLAC | * apps supporting .oga, .ogv SHOULD support decoding from muxed Ogg streams | ||
* covers Theora, Theora + Vorbis, Theora + Speex, Theora + FLAC, Dirac + Vorbis, MNG + FLAC, OggUVS omsode Ogg | |||
* May contain Ogg Skeleton and/or CMML logical bitstreams. | |||
== .ogg - audio/ogg+vorbis == | |||
* Ogg Vorbis I Profile | |||
* .ogg applies now for Ogg Vorbis I files only | |||
* .ogg has more recently also been used for Ogg FLAC and for Ogg Theora, too - these uses are deprecated now in favor of .oga and .ogv | |||
* has been defined in RFC 3534 http://www.ietf.org/rfc/rfc3534.txt for application/ogg, so rfc 3534 will be re-defined | |||
RATIONALE: .ogg has traditionally been used for Ogg Vorbis I files, in particular in HW players, which needs to continue to be supported | |||
== .spx - audio/ogg+speex == | == .spx - audio/ogg+speex == | ||
* Ogg Speex Profile | |||
* .spx has traditionally been used for Ogg Speex files and should be considered for backwards-compatibility | * .spx has traditionally been used for Ogg Speex files and should be considered for backwards-compatibility | ||
Revision as of 05:10, 16 May 2007
STATUS: final editing before being turned into an official Xiph recommendation and work on rfcs will start to reflect these policies
.ogx - application/ogg
- Ogg Multiplex Profile (anything in Ogg)
- can contain any logical bitstreams multiplexed together in an ogg container
- will replace the .ogg extension from RFC 3534 http://www.ietf.org/rfc/rfc3534.txt
- random multitrack files SHOULD contain a skeleton track to identify all containing logical bitstreams
- apps that identify a logical bitstream which they cannot decode SHOULD drop but MAY still decode the ones they can
.oga - audio/ogg
- Ogg Audio Profile (audio in Ogg container)
- apps supporting .oga, .ogv SHOULD support decoding from muxed Ogg streams
- covers Vorbis, Speex, FLAC, Ghost, OggPCM inside Ogg, though Ogg Vorbis and Ogg Speex also have special profiles
- May contain Ogg Skeleton and/or CMML logical bitstreams.
RATIONALE: This distinguishes audio-only files, using any of the Xiph audio codecs, from Ogg Vorbis I files (traditional .ogg) which may not contain more than one logical bitstream.
.ogv - video/ogg
- Ogg Video Profile (a/v in Ogg container)
- apps supporting .oga, .ogv SHOULD support decoding from muxed Ogg streams
- covers Theora, Theora + Vorbis, Theora + Speex, Theora + FLAC, Dirac + Vorbis, MNG + FLAC, OggUVS omsode Ogg
- May contain Ogg Skeleton and/or CMML logical bitstreams.
.ogg - audio/ogg+vorbis
- Ogg Vorbis I Profile
- .ogg applies now for Ogg Vorbis I files only
- .ogg has more recently also been used for Ogg FLAC and for Ogg Theora, too - these uses are deprecated now in favor of .oga and .ogv
- has been defined in RFC 3534 http://www.ietf.org/rfc/rfc3534.txt for application/ogg, so rfc 3534 will be re-defined
RATIONALE: .ogg has traditionally been used for Ogg Vorbis I files, in particular in HW players, which needs to continue to be supported
.spx - audio/ogg+speex
- Ogg Speex Profile
- .spx has traditionally been used for Ogg Speex files and should be considered for backwards-compatibility
.flac - application/flac
- flac in native encapsulation format
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 without container, but extra FLAC Ogg header (?)