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QuickTime Video, MJPEG Codec

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Table of Contents
• Identification and description
• Local use
• Sustainability factors
• Quality and functionality factors
• File type signifiers
• Notes
• Format specifications
• Useful references
Format Description Properties
• ID: fdd000089
• Short name: QTV_MJPEG
• Content categories: moving image
• Format category: file format, bitstream encoding
• Last significant update: 2007-08-07
• Draft status: Full

Identification and description Explanation of format description terms

Full nameQuickTime Video, MJPEG Codec
DescriptionFile format that wraps a MJPEG video bitstream with other data chunks, e.g., audio.
  Production phase  Used as a final-state format for enduser delivery; may also be used as a middle-state format, e.g., as the video source when producing lower-resolution streaming versions.
Relationship to other formats 
  Subtype ofQuickTime
  ContainsMJPEG video codec
  May containAudio streams not documented at this time

Local use Explanation of format description terms

LC experience or existing holdingsSee QuickTime
LC preferenceSee QuickTime

Sustainability factors Explanation of format description terms

DisclosureSee QuickTime and MJPEG
  DocumentationSee QuickTime and MJPEG
AdoptionUnknown to the compilers of this document.
  Licensing and patent claimsSee QuickTime and MJPEG
TransparencySee MJPEG
Self-documentationSee QuickTime
External dependenciesSee QuickTime
Technical protection considerationsSee QuickTime

Quality and functionality factors (video) Explanation of format description terms

Normal renderingGood support.
Clarity (support for high image resolution)Good to very good, given that this is a format used for compression and which supports interlaced video. QTV_MJPEG would be expected to provide the highest quality of the QuickTime codecs described at this web site, although at relatively high bitrates.
Fidelity (support for high audio resolution)See QuickTime
Support for multiple sound channelsSee QuickTime
Functionality beyond normal video renderingSee QuickTime

File type signifiers Explanation of format description terms

Tag typeValueNote
Filename Extensionmov 
Internet Media TypeSee QuickTime 
Magic numbersSee QuickTime 
Video type tag (QuickTime)mjpa, mjpbFour-character code identifying Motion JPEG video codecs "A" and "B," from QuickTime File Format, p. 92 or p.96.1

Notes Explanation of format description terms

General 
History 

Format specifications Explanation of format description terms

URLs

Print

Useful references

URLs
See QuickTime

Print

1There seem to have been at least two printings of the specification carrying the same date. These were not systematically compared by the compiler of this Web page. Pagination varies between these two printings.


Last updated: Tuesday, 21-Aug-2007 14:23:13 EDT

 
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