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 | AVI (Audio Video Interleaved) with Cinepak Video Codec |
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| Description | File format that wraps a Cinepak video bitstream with other data chunks, e.g., audio, in an AVI wrapper. Multiple versions of Cinepak exist, including SuperMac, Radius, and Compression Technologies; this document does not distinguish between them. |
| Production phase | Used as a middle-state and/or final-state format for enduser delivery. |
| Relationship to other formats | |
| Subtype of | AVI, AVI (Audio Video Interleaved) File Format |
| Contains | Cinepak, Cinepak. Video codec |
| May contain | WAVE, WAVE Audio File Format. For audio (interleaved with video). |
| May contain | MP3_CBR, MP3, Constant Bit Rate. For audio interleaved with video. |
| LC experience or existing holdings | |
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| LC preference | See AVI |
| Disclosure | See AVI and Cinepak |
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| Documentation | See AVI and Cinepak |
| Adoption | AVI is widely adopted for video production and filemaking; in 2000, commentator John McGowan writes, "Cinepak is the most widely used Video for Windows codecs." |
| Licensing and patents | See AVI and Cinepak |
| Transparency | See Cinepak |
| Self-documentation | See AVI |
| External dependencies | See AVI |
| Technical protection considerations | See AVI |
| Moving Image | |
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| Normal rendering | Good support. |
| Clarity (high image resolution) | Moderate to good, given that this is a format typically used for compression and does not support interlaced video. Outcome will depend on the type and extent of compression, and the encoder used. High resolution work is limited in the Windows environment due to file size limits (2 GB with FAT 16 technology; theoretical 8 GB with later technologies). |
| Functionality beyond normal rendering | See AVI |
| Tag | Value | Note |
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| Filename extension | avi |
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| Internet Media Type | See related format. |
See AVI. |
| Magic numbers | See related format. |
See AVI. |
| Microsoft FOURCC | CVID |
See the list of FOURCC codes. FOURCC codes are no longer managed by Microsoft, which has developed a new mechanism for identifying rich media types in general. |
| General | |
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| History |
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