OMF Interchange

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Avid released a specification for a Open Media Framework Interchange file format, capable of containing audio, video, graphics, still images, etc<ref>https://en.wikipedia.org/wiki/Open_Media_Framework_Interchange</ref><ref>https://web.archive.org/web/20000815100248/http://avid.com/3rdparty/omfi/index.html</ref>. The format was replaced with the [[AAF|Advanced Authoring Format]]<ref>http://www.edlmax.com/FormatOmf.htm</ref><ref>https://web.archive.org/web/20000816225754/http://www.avid.com/news/press_releases/product_news/aaf.html</ref>. Appears to be based on the [[Bento]] compound object format.
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Avid released a specification for a Open Media Framework Interchange file format, capable of containing audio, video, graphics, still images, etc<ref>https://en.wikipedia.org/wiki/Open_Media_Framework_Interchange</ref><ref>https://web.archive.org/web/20030809131248/http://www.peakoverload.com:80/Downloads/omfspec10.pdf</ref><ref>https://web.archive.org/web/20000815100248/http://avid.com/3rdparty/omfi/index.html</ref>. The format was replaced with the [[AAF|Advanced Authoring Format]]<ref>http://www.edlmax.com/FormatOmf.htm</ref><ref>https://web.archive.org/web/20000816225754/http://www.avid.com/news/press_releases/product_news/aaf.html</ref>. Previous draft versions used the [[IFF]] format developed by Electronic Arts, but this version uses the [[Bento]] container specification and application programming interface (API) developed by Apple Computer, Inc.
  
 
==File Identification==
 
==File Identification==
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OMFI 1 and 2 are different and some later software may not be compatible with the earlier version.<ref>https://www.mixonline.com/recording/workstation-file-format-interchange-part-1-364921</ref>
 
OMFI 1 and 2 are different and some later software may not be compatible with the earlier version.<ref>https://www.mixonline.com/recording/workstation-file-format-interchange-part-1-364921</ref>
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The main differences between OMFI 1.0 & 2.1 are that in 2.1 the following support had been added:<ref>https://web.archive.org/web/20030326012727/http://www.peakoverload.com:80/audio/FileInterchange/omf.shtml</ref>
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* Identification information in the Header object that allows you to determine the application that created an OMF file
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* Support for large media files (greater than 2 gigabytes) with 64 bit positions, lengths, and frame indexes
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* Support for user comments on Mobs and tagged user-defined information
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* Improved support for film pulldown conversions
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* Minor improvements to media handling and storage
  
 
==Software==
 
==Software==

Latest revision as of 17:04, 20 April 2023

File Format
Name OMF Interchange
Ontology
Extension(s) .omf
Type Code OMFI
Wikidata ID Q1459344
Released 1992

Avid released a specification for a Open Media Framework Interchange file format, capable of containing audio, video, graphics, still images, etc[1][2][3]. The format was replaced with the Advanced Authoring Format[4][5]. Previous draft versions used the IFF format developed by Electronic Arts, but this version uses the Bento container specification and application programming interface (API) developed by Apple Computer, Inc.

[edit] File Identification

Later OMF files can contain the hex values 6F6D66693A64617461 starting at byte 5, which is omfi:data in ASCII[6]

Identification can also be made from 24 bytes from EOF.[7]

OMFI 1 and 2 are different and some later software may not be compatible with the earlier version.[8]

The main differences between OMFI 1.0 & 2.1 are that in 2.1 the following support had been added:[9]

  • Identification information in the Header object that allows you to determine the application that created an OMF file
  • Support for large media files (greater than 2 gigabytes) with 64 bit positions, lengths, and frame indexes
  • Support for user comments on Mobs and tagged user-defined information
  • Improved support for film pulldown conversions
  • Minor improvements to media handling and storage

[edit] Software

[edit] References

  1. ↑ https://en.wikipedia.org/wiki/Open_Media_Framework_Interchange
  2. ↑ https://web.archive.org/web/20030809131248/http://www.peakoverload.com:80/Downloads/omfspec10.pdf
  3. ↑ https://web.archive.org/web/20000815100248/http://avid.com/3rdparty/omfi/index.html
  4. ↑ http://www.edlmax.com/FormatOmf.htm
  5. ↑ https://web.archive.org/web/20000816225754/http://www.avid.com/news/press_releases/product_news/aaf.html
  6. ↑ https://web.archive.org/web/20110728123616/http://www.linuxmedialabs.com/Downloads/LSI/omfspec21.pdf
  7. ↑ https://github.com/Ardour/ardour/blob/master/tools/omf/loader.cc#L149
  8. ↑ https://www.mixonline.com/recording/workstation-file-format-interchange-part-1-364921
  9. ↑ https://web.archive.org/web/20030326012727/http://www.peakoverload.com:80/audio/FileInterchange/omf.shtml
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