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MIME Types and File Extensions

3,385 bytes added, 07:06, 20 March 2010
m
Codec MIME types
WARNINGSTATUS: this page Work on RFCs and tools is under development and discussion - none in process to reflect these policies. More details are [http://wiki.xiph.org/index.php/MIMETypesCodecs here], which also include a specification of the codecs parameter of this are currently official Xiph recommendationsthe MIME tyes. Use the correct file extensions straight away.
== .DISCLAIMER: currently, application/ogg, video/ogg - application, audio/ogg ==and audio/vorbis are registered MIME types. Registration for the others will be undertaken. During this process, the "x-" versions of these unregistered MIME types may be used.
IMPLEMENTATION recommendations and patches: see [[MIME-Migration]].
 
== .ogx - application/ogg ==
 
* Ogg Multiplex Profile (anything in [[Ogg]])
* can contain any logical bitstreams multiplexed together in an ogg container
* has been defined as such in will replace the .ogg extension from 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/Vorbis* it is required that random multitrack files MUST contain a skeleton [[Skeleton]] track to identify all containing logical bitstreams* apps that identify a logical bitstream which they cannot decode SHOULD ignore it but MAY still decode the ones they can* thus, e.g. an annodex file can gracefully degrade to .ogx if an app cannot decode [[CMML]] and/or [[Skeleton]]* USE: application/ogg has been registered, so can be used immediately
== .ogv - video/ogg ==
 
* Ogg Video Profile (a/v in Ogg container)
* apps supporting .oga, .ogv SHOULD support decoding from muxed Ogg streams
* covers e.g. [[Theora]], Theora + Vorbis, Theora + Speex, Theora + FLAC, [[Dirac]] + Vorbis, [[OggMNG|MNG]] + FLAC, [[OggUVS]] inside Ogg
* This list is not exhaustive (for example, [[Dirac]] + FLAC is acceptable too)
* SHOULD contain a Skeleton track and/or MAY contain a CMML logical bitstream.
== .oga - audio/ogg ==
* Ogg Audio Profile (audio in oggOgg container)* Applications supporting .oga, e.g. vorbisogv SHOULD support decoding from muxed Ogg streams* Covers Ogg [[FLAC]], speex[[Ghost]], flacand [[OggPCM]] * Although they share the same MIME type, ghostVorbis and Speex use different file extensions.* SHOULD contain a Skeleton logical bitstream.* Vorbis and Speex may use .oga, but it is not the prefered method of distributing these files because of backwards-compatibility issues.
== .ogg - audio/ogg == * Ogg Vorbis I Profile* .ogg applies now for Vorbis I files only* .ogg has more recently also been used for Ogg FLAC and for Theora, too — these uses are deprecated now in favor of .oga and .ogv respectively* 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 Vorbis I files, in particular in HW players, hence it is kept for backwards-compatibility == .spx - audio/ogg == * Ogg Speex Profile* .spx has traditionally been used for Speex files within Ogg and should be considered for backwards-compatibility == .flac - audio/flac == * FLAC in native encapsulation format == .anx - application/annodex == * Profile for multiplexed Ogg that includes a skeleton track and at least one CMML logical bitstream* apps that identify a logical bitstream which they cannot decode SHOULD ignore it but MAY still decode the ones they can* apps that come across an annodex file and cannot decode CMML and/or Skeleton, but can deal with the others SHOULD gracefully degrade by ignoring these == .axa - audio/annodex == * Profile for audio in Annodex * covers e.g. [[Vorbis]], [[Speex]], [[FLAC]], [[Ghost]], [[OggPCM]] inside Ogg with Skeleton and CMML == .axv - video/ogg annodex == * Profile for video in Annodex * covers e.g. [[Theora]], Theora + Vorbis, Theora + Speex, Theora + FLAC, [[Dirac]] + Vorbis, [[OggMNG|MNG]] + FLAC, [[OggUVS]] inside Ogg with Skeleton and CMML
* a== .xspf - application/v in ogg, e.g. Theora, Theora + Vorbis, Theora + Speex, Theora xspf+ flacxml ==
== .spx - audio/ogg+speex ==* Profile for XSPF* Covers [[XSPF]], while being used through XML* Does not cover [[JSPF]], which is XSPF but on JSON
* .spx has traditionally been used for == Ogg Speex Kate files- application/kate ==
* Binary representation of Kate encapsulated in Ogg
* may have a skeleton
* can be used to identify the mime type of the track itself (e.g. in skeleton)
* uses .ogx extension when in a file by itself
* is subdued by the dominant mime type if in a audio or video file to become audio/ogg or video/ogg
== Codec MIME types ==
Codecs need their own MIME types for streaming in RTP and to be used in multitrack ogg files using skeleton:
* audio/vorbis for vorbis w/o Vorbis without container* video/theora for theora w/o Theora without container* audio/speex for speex w/o Speex without container* audio/flac for flac (is audioFLAC without and in native container* text/flac currently being used cmml for flac in native CMML without container?* application/kate for the textual representation of Kate (.kate files)

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