(registered 2018-07-30, last updated 2018-07-30) MIME media type name: image MIME subtype name: avcs This MIME type may be used when the requirements of the 'avcs' brand specified in section E.4.2 of ISO/IEC 23008-12 apply. (A brand in the file header identifies a specific profile of a more general format.) Required parameters: none Optional parameters: profiles: Specified by RFC 6381 and its successors. codecs: Specified by RFC 6381 and its successors for files conforming to specifications derived from ISO/IEC 14496-12 and derived specifications. Note that for AVC, the format of a list item included in the value of the codecs parameter is specified in ISO/IEC 14496-15. When the codecs parameter is present, the first list item should represent a track having the handler type 'pict'. Other list items represent other tracks. Encoding considerations: as for video/mp4 Security considerations: See section 4 of RFC 4337 and section 7 of RFC 6381. This format does not supply integrity or confidentiality protection and so they are applied externally when needed. Interoperability considerations: Interoperably deployed in reference code available from ISO, Javascript code from Nokia labs, in open-source in MP4Box and various other implementations. Published specification: ISO/IEC 23008-12, available as a Publicly Available Standard at http://standards.iso.org/ittf/PubliclyAvailableStandards/index.html Applications: Multimedia, Imaging, Pictures Fragment identifier considerations: Fragment identifiers are specified in Annex L of ISO/IEC 14496-12, available as a Publicly Available Standard at http://standards.iso.org/ittf/PubliclyAvailableStandards/index.html Additional information: Magic number(s): none File extension(s): avcs Macintosh File Type Code(s): None Person to contact for info: David Singer, singer&apple.com Intended usage: Common Author/Change controller: David Singer, ISO/IEC/JTC1/SC29/WG11 file format chair