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{{AFC submission|d|v|u=Mrmxf|ns=118|decliner=Behind the moors|declinets=20220315165606|ts=20220315141422}} <!-- Do not remove this line! -->
{{Short description|Standard for mastering and localising media}}
{{Draft topics|media|stem}}
{{AfC topic|stem}}
{{Use dmy dates|date=August 2021}}
{{Infobox file format
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In IMF, each kind of [[Essence (media)|essence]] (video, audio, subtitles, etc.) is stored in individual media files (“Track Files”) and the instructions for synchronizing these media files are stored in a separate playlist file (“Composition Playlist”). This component-based approach allows the large media files to be reused across multiple playlists, each representing a different version of the content.
The IMF family of standards is maintained by [[Society of Motion Picture and Television Engineers|SMPTE]].<ref name=":0">{{Cite journal |date=2021-08 |title=OV 2067-0-2021 - SMPTE Overview Document - Interoperable Master Format |url=https://ieeexplore.ieee.org/document/9521128/ |journal=OV 2067-0-2021 |pages=1–4 |doi=10.5594/SMPTE.OV2067-0-2021}}</ref>. Its first edition was published in 2013.
= Architecture =
At the heart of IMF is the Composition, illustrated in the first image, which consists of a single Composition Playlist and a collection of Track Files. Each Composition corresponds to a single audio-visual master.
[[File:IMF_Composition.png|alt=An IMF Composition is defined by a Composition Play List|thumb|IMF Composittion]]
Each Track File contains a single kind of audio-visual essence corresponding to a single aspect of the presentation. For example, a first Track File might contain the primary video program while a second might contain Spanish stereo audio and a third English subtitles. Track Files use a constrained version of the MXF OP1a format <nowiki>[
The Composition Playlist is an [[XML]] document. It assembles the Track Files onto virtual tracks that are synchronized onto a timeline. It also contains metadata associated with that timeline.The combination of a Composition Playlist and the Track Files it references is called a Composition.
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= Example uses =
IMF is specified by professional content creators for delivery of their content, including: BBC<ref>{{Cite web |title=TechnicalDeliveryStandardsBBCUHDiPlayerSupplement.pdf |url=https://www.dropbox.com/s/tkvwxksgy3izpca/TechnicalDeliveryStandardsBBCUHDiPlayerSupplement.pdf?dl=0 |access-date=2022-03-04 |website=Dropbox |language=en}}</ref>, Netflix<ref>{{Cite web |title=Netflix Branded Delivery Specifications v4.1 |url=https://partnerhelp.netflixstudios.com/hc/en-us/articles/214806618-Netflix-Branded-Delivery-Specifications-v4-1 |access-date=2022-03-04 |website=Netflix {{!}} Partner Help Center |language=en-US}}</ref> [6] and Disney<ref>{{Cite web |title=Disney Media Tech Specs |url=https://mediatechspecs.disney.com/production/naming-convention/naming-convention#/mastering/video/imf-master-packages |access-date=2022-03-04 |website=mediatechspecs.disney.com}}</ref>
= Supported essence =
IMF supports a wide range of audio-visual essence and metadata, including:
* Image up to 8192x6224 rasters, lossy and lossless compression, high-dynamic range, wide color gamut and stereoscopic 3D,<ref name=":2" />
* 24-bit 48 kHz channel-based sound, arranged in arbitrary configurations
* Immersive Audio Bitstream (IAB) immersive sound<ref>{{Cite journal |date=2019-06 |title=ST 2098-2:2019 - SMPTE Standard - Immersive Audio Bitstream Specification |url=https://ieeexplore.ieee.org/document/8752533/ |journal=ST 2098-2:2019 |pages=1–54 |doi=10.5594/SMPTE.ST2098-2.2019}}</ref>
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