OMF Interchange
From Just Solve the File Format Problem
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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>. | + | 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== | ||
Later OMF files can contain the hex values {{magic|6F6D66693A64617461}} starting at byte 5, which is <code>omfi:data</code> in ASCII<ref>https://web.archive.org/web/20110728123616/http://www.linuxmedialabs.com/Downloads/LSI/omfspec21.pdf</ref> | Later OMF files can contain the hex values {{magic|6F6D66693A64617461}} starting at byte 5, which is <code>omfi:data</code> in ASCII<ref>https://web.archive.org/web/20110728123616/http://www.linuxmedialabs.com/Downloads/LSI/omfspec21.pdf</ref> | ||
| + | |||
| + | Identification can also be made from 24 bytes from EOF.<ref>https://github.com/Ardour/ardour/blob/master/tools/omf/loader.cc#L149</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> | 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> | ||
| + | |||
| + | 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> | ||
| + | |||
| + | * 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 | ||
==Software== | ==Software== | ||
Latest revision as of 17:04, 20 April 2023
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
- ↑ https://en.wikipedia.org/wiki/Open_Media_Framework_Interchange
- ↑ https://web.archive.org/web/20030809131248/http://www.peakoverload.com:80/Downloads/omfspec10.pdf
- ↑ https://web.archive.org/web/20000815100248/http://avid.com/3rdparty/omfi/index.html
- ↑ http://www.edlmax.com/FormatOmf.htm
- ↑ https://web.archive.org/web/20000816225754/http://www.avid.com/news/press_releases/product_news/aaf.html
- ↑ https://web.archive.org/web/20110728123616/http://www.linuxmedialabs.com/Downloads/LSI/omfspec21.pdf
- ↑ https://github.com/Ardour/ardour/blob/master/tools/omf/loader.cc#L149
- ↑ https://www.mixonline.com/recording/workstation-file-format-interchange-part-1-364921
- ↑ https://web.archive.org/web/20030326012727/http://www.peakoverload.com:80/audio/FileInterchange/omf.shtml
