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QuickTime File Format

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QuickTime Movie
Filename extension
.mov, .qt
Internet media type
video/quicktime[1][2]
Type codeMooV
Uniform Type Identifier (UTI)com.apple.quicktime-movie
Developed byApple Inc.
Type of formatMedia container
Container forAudio, video, text
Extended toMPEG-4 Part 12
Free format?No[3]

QuickTime File Format (QTFF) is a computer file format used natively by the QuickTime framework.[4][5][6]

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Relation to MP4

Because both the QuickTime and MP4 container formats can use the same MPEG-4 formats, they are mostly interchangeable in a QuickTime-only environment. MP4, being an international standard, has more support. This is especially true on hardware devices, such as the PlayStation Portable and various DVD players; on the software side, most DirectShow and Video for Windows codec packs[7][8] include an MP4 parser, but not one for QTFF.

In QuickTime Pro's MPEG-4 Export dialog, an option called "Passthrough" allows a clean export to MP4 without affecting the audio or video streams. One discrepancy ushered in by QuickTime 7 released on April 29, 2005, is that the QuickTime file format supports multichannel audio (used, for example, in the high-definition trailers on Apple's site[9]).

Extensions

Main articles: ISO base media file format and MPEG-4 Part 14

The International Organization for Standardization approved the QuickTime file format as the basis of the MPEG-4 file format. The MPEG-4 file format specification was created on the basis of the QuickTime format specification published in 2001.[10] The MP4 (.mp4) file format was published in 2001 as the revision of the MPEG-4 Part 1: Systems specification published in 1999 (ISO/IEC 14496-1:2001).[11][12][13] In 2003, the first version of MP4 format was revised and replaced by MPEG-4 Part 14: MP4 file format (ISO/IEC 14496-14:2003).[14] The MP4 file format was generalized into the ISO Base Media File Format ISO/IEC 14496-12:2004, which defines a general structure for time-based media files. It in turn is used as the basis for other multimedia file formats (for example 3GP, Motion JPEG 2000).[15][16][17][18][19] A list of all registered extensions for ISO Base Media File Format is published on the official registration authority website www.mp4ra.org. This registration authority for code-points in "MP4 Family" files is Apple Inc. and it is named in Annex D (informative) in MPEG-4 Part 12.[18]

See also

References

  1. ^ "Video Media Types". IANA. 1993-06-04. Retrieved 2010-07-20.
  2. ^ "The Codecs Parameter for "Bucket" Media Types". IETF. November 2005. Retrieved 2010-07-20.
  3. ^ "QuickTime - Licensing and Trademarks - Apple Developers".
  4. ^ Apple Inc. "QuickTime File Format Specification: Introduction to QuickTime File Format Specification". Retrieved 2018-10-09.
  5. ^ AfterDawn.com. "QuickTime - AfterDawn.com glossary". Retrieved 2010-07-20.
  6. ^ "QuickTime container". MultimediaWiki. Retrieved 2010-07-20.
  7. ^ DefilerPak – A lightweight codec pack for Windows PCs Archived August 15, 2015, at the Wayback Machine
  8. ^ K-LiteCodecPack.com: Download Codecs, Videos and MP3s
  9. ^ Apple – Movie Trailers Archived 2010-02-13 at the Wayback Machine
  10. ^ Apple Inc. (2001). "Classic Version of the QuickTime File Format Specification". Retrieved 2009-06-14.
  11. ^ Library of Congress (2001). "MPEG-4 File Format, Version 1". Retrieved 2009-06-14.
  12. ^ Network Working Group (2006). "RFC 4337 – MIME Type Registration for MPEG-4". Retrieved 2009-06-14.
  13. ^ International Organization for Standardization (2001). "MPEG-4 Part 1: Systems; ISO/IEC 14496-1:2001". Retrieved 2009-06-11.
  14. ^ International Organization for Standardization (2003). "MPEG-4 Part 14: MP4 file format; ISO/IEC 14496-14:2003". Retrieved 2009-06-11.
  15. ^ mp4ra.org – MP4 Registration authority. "References, MPEG-4 Registration authority". Retrieved 2009-06-14.{{cite web}}: CS1 maint: numeric names: authors list (link)
  16. ^ ISO (April 2006). "ISO Base Media File Format white paper – Proposal" (Document). Archived from the original on 2008-07-14. Retrieved 2009-12-26. {{cite document}}: Cite document requires |publisher= (help); Unknown parameter |access-date= ignored (help); Unknown parameter |archive-date= ignored (help); Unknown parameter |archive-url= ignored (help); Unknown parameter |url= ignored (help)
  17. ^ ISO (October 2009). "ISO Base Media File Format white paper – Proposal" (Document). chiariglione.org. Retrieved 2009-12-26. {{cite document}}: Unknown parameter |access-date= ignored (help); Unknown parameter |url= ignored (help)
  18. ^ a b ISO (2008). "ISO/IEC 14496-12:2008, Information technology – Coding of audio-visual objects – Part 12: ISO base media file format" (PDF) (Document). International Organization for Standardization. pp. 88, 94. Retrieved 2009-05-30. {{cite document}}: Unknown parameter |access-date= ignored (help); Unknown parameter |format= ignored (help); Unknown parameter |url= ignored (help)
  19. ^ International Organization for Standardization (2004). "MPEG-4 Part 12: ISO base media file format; ISO/IEC 14496-12:2004". Retrieved 2009-06-11.
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