Format
Macromedia Flash
Summary
- Name
- Macromedia Flash
- Version
- 7
- Identifiers
-
- MIME: application/x-shockwave-flash
- PUID: fmt/110
- Description
- The Adobe Flash format, SWF, previously known as Shockwave Flash or Macromedia Shockwave Flash, and alternatively known as the Small Web Format, is a file format primarily designed for creating interactive multimedia applications. The format iterates rapidly, often in line with new releases of Adobe Flash or Adobe Air. Prior to version 6 all SWF files were uncompressed, however version 6 introduced the option of using zlib compression. Version 13 introduced the option of using LZMA compression..
- File extensions
-
swf - Source
- Digital Preservation Department / The National Archives
- Developed by
- Macromedia, Inc.
- Supported by
- Adobe Systems Incorporated
Relationships
- Has priority over
- Is subsequent version of
Internal signatures
SWF 7
- Note
- Header (FWS then version number) and end tag (..)
Byte sequences
- Min Frag Length
- Absolute from BOF
- Offset
- 0
- Max offset
- None
- Byte Sequence
46575307- Endianness
- None
- Min Frag Length
- Absolute from EOF
- Offset
- 0
- Max offset
- None
- Byte Sequence
0000- Endianness
- None
SWF 7 - zlib compressed
- Note
- Header (CWS then version number)
Byte sequences
- Min Frag Length
- Absolute from BOF
- Offset
- 0
- Max offset
- 0
- Byte Sequence
43575307- Endianness
- None
Changelog
-
Updated in V94
- Release date
- 17 September 2018
Macromedia Flash 7: Given priority over MPEG 1/2 Audio Layer 3 fmt/134 due to rare clash condition.
-
Updated in V83
- Release date
- 17 December 2015
Macromedia Flash 7: Added description.
-
Updated in V67
- Release date
- 26 February 2013
Macromedia Flash 7: Improved signature through PRONOM Research.