Sustainability of Digital Formats
Planning for Library of Congress Collections
Sustainability of Digital Formats
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| Introduction | Sustainability Factors | Content Categories | Format Descriptions | Contact | |
| Full name | Information technology -- Coding of audio-visual objects (formal name)MPEG-4, Visual Coding, Simple Studio Profile |
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| Description | See also MP4_FF_2 and MPEG-4_V. Offers very high quality for studio editing applications.1 The Simple Studio Profile permits the use of the following visual object types: • Simple studio: arbitrarily shaped video, uses intra (I) video object planes (VOPs, the MPEG-4 term for frames) only. This type differs from the MPEG-4 simple object type and has syntax closer to MPEG-2 to permit easy transcoding and does not permit the use of predicted (P) VOPs. Four compression levels are permitted, with bit rates from 180 to 1,800 Mbps. |
| Production phase | Generally an initial- or middle-state format, used in video production. |
| Relationship to other formats | |
| Subtype of | MPEG-4_V, MPEG-4, Visual Coding (Part 2) |
| Used by | MP4_FF_2_V, MPEG-4 File Format, V.2, with Visual Coding (All Profiles) |
| LC experience or existing holdings | |
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| LC preference |
| Disclosure | Open standard. See MP4_FF_2. |
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| Documentation | See MP4_FF_2. |
| Adoption | Actual adoption not known to the compilers of this document. |
| Licensing and patents | See MP4_FF_2. |
| Transparency | See MP4_FF_2. |
| Self-documentation | See MP4_FF_2. |
| External dependencies | See MP4_FF_2. |
| Technical protection considerations | See MP4_FF_2. |
| Moving Image | |
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| Normal rendering | Good support. |
| Clarity (high image resolution) | See MPEG-4 and MPEG-4_V. Potential for greater clarity at a given picture size, data rate, and encoding algorithm, than most other MPEG-4 profiles, e.g., Simple, Simple Scalable, Advanced Simple, Core, and Main Profiles. |
| Functionality beyond normal rendering | See MPEG-4. |
| Tag | Value | Note |
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| Filename extension | mp4 |
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| Internet Media Type | See note |
See MP4_FF_2 |
| Magic numbers | See note |
See MP4_FF_2 |
| File type brand (ISO Base Media File Format) | See note |
Indicated in file wrapper and relates to "brands" defined in ISO_BMFF. Wrapping MPEG-4_V bitstreams in MP4_FF_1 would occasion the use of mp41; in MP4_FF_2, use mp42. See Part 15 of the standard, pp. 2-9, 13. |
| Other | 11100001, 11100010, 1110011, 11100100 |
Profile and level indicators. For profile_and_level_indication for Simple Studio Profile, levels 1, 2, 3, and 4. From Annex G of Part 2 of the standard, as amended Amd.2:2002, pp. 52-53. |
| General | |
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| History |
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