Sustainability of Digital Formats
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Introduction | Sustainability Factors | Content Categories | Format Descriptions | Contact |
Full name | ISO/IEC 14496. Information technology -- Coding of audio-visual objects (formal name for set of specifications that include Part 14, MP4 File Format, and Part 2, Visual [encoding]) MPEG-4 file format, version 2, with Visual Coding (common name) |
Description | Combination of a file format (wrapper) and encoding category (Visual Coding, all profiles). |
Production phase | Generally a final-state (end-user delivery) format, may also serve as middle-state format. |
Relationship to other formats | |
Subtype of | MP4_FF_2, MPEG-4 File Format, Version 2 |
May contain | MPEG-4_V, Visual Encoding (Part 2), (All Profiles) |
May contain | AAC_MP4 (MPEG-4 Advanced Audio Coding) |
May contain | AAC_MP4_LC, AAC (MPEG-4) Low Complexity Object |
May contain | Additional audio, graphics, and scene graph stream types. Not documented at this time. |
LC experience or existing holdings | The content produced by the NDIIPP partnership project with SCOLA consists of foreign television news broadcasts in MP4_FF_2_V, MPEG-4 File Format, V.2, with Visual Encoding. |
LC preference |
Disclosure | Open standard. Developed by ISO technical program JTC 1/SC 29 (WG11), aka the Motion Picture Experts Group (MPEG). See http://www.iso.org/iso/en/CatalogueListPage.CatalogueList?COMMID=148&scopelist=PROGRAMME. |
Documentation | See MP4_FF_2 and MPEG-4_V. |
Adoption | See MP4_FF_2. |
Licensing and patent claims | See MP4_FF_2. |
Transparency | See MPEG-4_V. |
Self-documentation | See MP4_FF_2. |
External dependencies | See MP4_FF_2. |
Technical protection considerations | See MP4_FF_2. |
Video elements | |
Normal rendering for video | See MP4_FF_2. |
Clarity (support for high image resolution) | See MPEG-4_V. |
Functionality beyond normal video rendering | See MP4_FF_2. |
Sound elements | |
Fidelity (support for high audio resolution) | See MP4_FF_2. |
Support for multiple sound channels | See MP4_FF_2. |
Functionality beyond normal rendering for sound | See MP4_FF_2. |
Tag type | Value | Note |
Filename Extension | See MP4_FF_2. | |
Internet Media Type | See MP4_FF_2 | |
Magic numbers | See MP4_FF_2 | |
File type brand | See MP4_FF_2 |
General | The video-capable iPod introduced by Apple in late 2005 features this specification: MPEG-4 video up to 2.5 mbps, 480 x 480, 30 frames per sec., Simple Profile [MPEG-4_V_SP] with AAC-LC [AAC_MP4_LC] up to 160 Kbps, 48 Khz, stereo audio in .m4v, .mp4 and .mov file formats. |
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