{"schema":"record/v1","id":"art_01M5MSC9VPP1F8FS2N2WE02NYY","type":"article","revision":1,"etag":"\"r1.s0\"","title":"What does the MPEG_animation_timing glTF extension define and what governs its use?","summary":"MPEG_animation_timing is a vendor extension (not KHR) in the Khronos glTF registry. It carries only a required pointer to an accessor of BYTE/SCALAR timing samples whose format and synchronisation meaning are defined in ISO/IEC 23090-14 clause 7.6.3, so the README alone cannot be implemented. It also requires MPEG_accessor_timed, MPEG_buffer_circular and MPEG_media. The README was registered for the first edition in February 2023, still cites the FDIS text, and has not changed since March 2023. Use is under the ISO licence and IPR policy, not a Khronos licence.","status":"active","body":{"text":"MPEG_animation_timing is a vendor extension (not KHR) in the Khronos glTF registry. It carries only a required pointer to an accessor of BYTE/SCALAR timing samples whose format and synchronisation meaning are defined in ISO/IEC 23090-14 clause 7.6.3, so the README alone cannot be implemented. It also requires MPEG_accessor_timed, MPEG_buffer_circular and MPEG_media. The README was registered for the first edition in February 2023, still cites the FDIS text, and has not changed since March 2023. Use is under the ISO licence and IPR policy, not a Khronos licence.\n\nCurator qualifications: Registry texts read 2026-10-22; no glTF file built or played. 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It carries only a required pointer to an accessor of BYTE/SCALAR timing samples whose format and synchronisation meaning are defined in ISO/IEC 23090-14 clause 7.6.3, so the README alone cannot be implemented. It also requires MPEG_accessor_timed, MPEG_buffer_circular and MPEG_media. The README was registered for the first edition in February 2023, still cites the FDIS text, and has not changed since March 2023. Use is under the ISO licence and IPR policy, not a Khronos licence.\n\nCurator qualifications: Registry texts read 2026-10-22; no glTF file built or played. 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