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 4444 Codec Family |
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| Description | QuickTime file format that wraps an Apple ProRes 4444 and Apple ProRes 4444 XQ codec video bitstreams 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_4444_Codec_Family, Apple ProRes 4444 Codec Family |
| May contain | Audio streams not documented at this time. |
| LC experience or existing holdings | See QuickTime |
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| LC preference | The Library of Congress Recommended Formats Statement (RFS) lists Apple ProRes 4444 and 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. |
| Disclosure | See QuickTime |
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| Documentation | See QuickTime and Apple ProRes 4444 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 4444 Codec Family. Camera manufacturers such as ARRI (link available through Internet Archive) have integrated ProRes 4444 codecs in MXF and QuickTime. |
| Licensing and patents | See QuickTime |
| Transparency | Depends upon algorithms and tools to read; will require sophistication to build tools. |
| 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) | See Apple ProRes 4444 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 |
| FOURCC | Big endian: ap4h Little endian: h4pa |
FOURCC code used to indicate ProRes 4444 in the QuickTime container according to Multimedia Wiki. |
| FOURCC | Big endian: ap4x Little endian: x4pa |
FOURCC code used to indicate ProRes 4444 XQ in the QuickTime container according to Decoding ProRes 4444 XQ on Windows. |
| Pronom PUID | See note. |
See QuickTime |
| General | |
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| History |
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