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 | Apple ProRes 422 LT |
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| Description |
Apple ProRes 422 LT is the third-highest data-rate version of the ProRes 422 codecs. Apple literature highlights the value of Apple ProRes 422 LT as an editing codec, stating that it "is perfect for environments where storage capacity and data rate are at a premium." In order to compare the members of the ProRes 422 family, this Web site uses 10-bit picture data with an HD (1920x1080) frame size and a frame rate of 29.97 fps. Uncompressed, this yields about 560 GB per hour. Although the variable bit rate for ProRes means that results will vary, specialists report that the 102 Mbps target data rate for Apple ProRes 422 would yield a one-hour file of about 45 GB. See the Apple ProRes 422 Codec Family for a general description of the shared technical characteristics as well as history of the format. |
| Production phase | Production (initial state) and post production (middle state). |
| Relationship to other formats | |
| Subtype of | Apple_ProRes_422_Codec_Family, Apple ProRes 422 Codec Family |
| LC experience or existing holdings | None. |
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| LC preference | See the Recommended Formats Statement for the Library of Congress format preferences for Video - File-Based and Physical Media. |
| Disclosure | See Apple_ProRes_422_Codec_Family |
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| Documentation | See Apple_ProRes_422_Codec_Family |
| Adoption | See Apple_ProRes_422_Codec_Family |
| Licensing and patents | See Apple_ProRes_422_Codec_Family |
| Transparency | See Apple_ProRes_422_Codec_Family |
| Self-documentation | See Apple_ProRes_422_Codec_Family |
| External dependencies | See Apple_ProRes_422_Codec_Family |
| Technical protection considerations | See Apple_ProRes_422_Codec_Family |
| Moving Image | |
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| Normal rendering | See Apple ProRes 422 Codec Family |
| Clarity (high image resolution) | Good. Smaller data rate than Apple ProRes 422 and Adobe ProRes 422 Proxy but still a high quality file for offline editing. |
| Functionality beyond normal rendering | See Apple ProRes 422 Codec Family |
| Tag | Value | Note |
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| Filename extension | See note. | See Apple_ProRes_422_Codec_Family |
| FOURCC | Big endian: apcs Little endian: scpa |
FOURCC code used to indicate ProRes 442 LT in the QuickTime container according to Multimedia Wiki. |
| General | See Apple ProRes 422 Codec Family |
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| History |
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