Sustainability of Digital Formats: Planning for Library of Congress Collections
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, Apple ProRes 422 Codec Family |
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| Description | QuickTime file format that wraps an Apple ProRes 422 Codec video bitstream with other data chunks, e.g., audio. |
| Production phase | Production (initial state) and post production (middle state). |
| Relationship to other formats | |
| Subtype of | QuickTime, QuickTime File Format |
| Contains | Apple_ProRes_422_Codec_Family, Apple ProRes 422 Codec Family |
| May contain | Audio streams not documented at this time. |
| LC experience or existing holdings | The Civil Rights History Project in the American Folklife Center contains Apple ProRes 422 and Apple ProRes 422 HQ files. |
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| LC preference | The Library of Congress Recommended Formats Statement (RFS) lists Apple ProRes 4444, 4444 XQ (see Apple ProRes 4444 Codec Family) and 422 HQ in a QuickTime wrapper as a Preferred format for Video - File-Based and Physical Media. See also QuickTime |
| Disclosure | See QuickTime |
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| Documentation | See QuickTime and Apple ProRes 422 Codec Family. |
| Adoption | According to Annie Schweikert in A Guide to the QuickTime File Format (link available through Internet Archive), "ProRes has been associated with QuickTime since its release in 2001, when the two were bundled together in Apple’s Final Cut software. Though certainly a product of Apple’s own marketing, the pairing makes sense from a structural standpoint as well, as Apple designed ProRes to mimic QuickTime’s atomic structure." Wide adoption for professional moving image production especially in the creation of documentaries and other programs for broadcast television. See Apple ProRes 422 Codec Family. Within the federal sector, examples include the American Folklife Center Civil Rights History Project and the NOAA Okeanus Explorer Project both of which are detailed in the FADGI Creating and Archiving Born Digital Video report. Camera manufacturers such as ARRI (link available through Internet Archive) have integrated ProRes in QuickTime support. |
| Licensing and patents | See QuickTime |
| Transparency | Depends upon algorithms and tools to read; will require sophistication to build tools. |
| Self-documentation |
See QuickTime Accessibility Features Typically, accessibility features such as captions and subtitles are carried in containers and wrappers, not in encoded video data. QuickTime is a common wrapper for ProRes family codecs, though others may be used. See QuickTime for web accessibility information. See W3C's Making Audio and Video Media Accessible for more general information about accessible sound and moving image media. |
| External dependencies | See QuickTime |
| Technical protection considerations | See QuickTime |
| Moving Image | |
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| Normal rendering | Good support. |
| Clarity (high image resolution) | See Apple ProRes 422 Codec Family |
| 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 |
| Pronom PUID | See related format. |
See QuickTime |
| Wikidata Title ID | See related format. |
See QuickTime |
| General | |
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| History |
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