Sustainability of Digital Formats: Planning for Library of Congress Collections |
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Introduction | Sustainability Factors | Content Categories | Format Descriptions | Contact |
Full name | QuickTime Video, MJPEG Codec |
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Description | File 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 of | QuickTime, Quicktime File Format |
Contains | MJPEG, Motion JPEG Video Codec |
May contain | Audio streams not documented at this time |
LC experience or existing holdings | See QuickTime |
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LC preference | See QuickTime |
Disclosure | See QuickTime and MJPEG |
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Documentation | See QuickTime and MJPEG |
Adoption | Unknown to the compilers of this document. |
Licensing and patents | See QuickTime and MJPEG |
Transparency | See MJPEG |
Self-documentation | See QuickTime |
External dependencies | See QuickTime |
Technical protection considerations | See QuickTime |
Moving Image | |
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Normal rendering | Good support. |
Clarity (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. |
Functionality beyond normal rendering | See QuickTime. |
Tag | Value | Note |
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Filename extension | mov |
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Internet Media Type | See related format. | See QuickTime |
Magic numbers | See related format. | See QuickTime |
Apple Video Sample Description | mjpa mjpb |
Four-character code identifying Motion JPEG video codecs "A" and "B," from QuickTime File Format, p. 92 or p.96.1 |
General | |
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History |
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.
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