JPEG XL

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|mimetypes={{mimetype|image/jxl}}
 
|mimetypes={{mimetype|image/jxl}}
 
|extended from=[[JPEG]], [[PIK]], [[FUIF]]
 
|extended from=[[JPEG]], [[PIK]], [[FUIF]]
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|pronom={{PRONOM|fmt/1484}}, {{PRONOM|fmt/1485}}
 
|magic={{magic|FF 0A}} or {{magic|00 00 00 0C 4A 58 4C 20 0D 0A 87 0A}}
 
|magic={{magic|FF 0A}} or {{magic|00 00 00 0C 4A 58 4C 20 0D 0A 87 0A}}
 
|patent license=Royalty-Free
 
|patent license=Royalty-Free
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== Identification ==
 
== Identification ==
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Based on the [https://gitlab.com/wg1/jpeg-xl/-/blob/master/lib/jxl/decode.cc reference implementation], JPEG XL codestreams start with bytes {{magic|ff 0a}}.
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* Based on the [https://gitlab.com/wg1/jpeg-xl/-/blob/master/lib/jxl/decode.cc reference implementation], JPEG XL codestreams start with bytes {{magic|ff 0a}}.
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Codestreams may also be wrapped in an ISOBMFF-based file format ([https://gitlab.com/wg1/jpeg-xl/-/blob/master/tools/box/box.cc implementation]). See [https://gitlab.com/wg1/jpeg-xl/-/blob/main/doc/format_overview.md format overview].
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* Codestreams may also be wrapped in an ISOBMFF-based file format ([https://gitlab.com/wg1/jpeg-xl/-/blob/master/tools/box/box.cc implementation]). See [https://gitlab.com/wg1/jpeg-xl/-/blob/main/doc/format_overview.md format overview]:
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** the first 4 bytes would be the size of the box (<code>00 00 00 0C</code>, meaning 12 bytes long),
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** the box ID would be <code>4A 58 4C 20</code> (in ASCII <code>JXL </code>) and
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** the box content would be the overall signature <code>0D 0A 87 0A</code>.
  
 
== Specifications ==
 
== Specifications ==
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== Sample files ==
 
== Sample files ==
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* https://telparia.com/fileFormatSamples/image/jpegXL/
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* {{DexvertSamples|image/jpegXL}}
  
 
== Links ==
 
== Links ==

Latest revision as of 10:50, 10 February 2024

File Format
Name JPEG XL
Ontology
Extension(s) .jxl
MIME Type(s) image/jxl
PRONOM fmt/1484, fmt/1485
Extended From [[JPEG, PIK, FUIF]]
Magic Bytes FF 0A or 00 00 00 0C 4A 58 4C 20 0D 0A 87 0A
Patent License Royalty-Free
Released 2021

JPEG XL is a compressed image format and/or file format that is yet another attempt to be the next JPEG. It was first announced around 2017-08. It is expected to be published as ISO/IEC 18181.

JPEG XL is based in part on the FUIF and PIK formats.[1] The standard also supports recompression of JPEG files with bit-exact reconstruction.

Contents

[edit] Identification

  • Based on the reference implementation, JPEG XL codestreams start with bytes ff 0a.
  • Codestreams may also be wrapped in an ISOBMFF-based file format (implementation). See format overview:
    • the first 4 bytes would be the size of the box (00 00 00 0C, meaning 12 bytes long),
    • the box ID would be 4A 58 4C 20 (in ASCII JXL ) and
    • the box content would be the overall signature 0D 0A 87 0A.

[edit] Specifications

[edit] Software

[edit] Sample files

[edit] Links

Retrieved from "http://fileformats.archiveteam.org/index.php?title=JPEG_XL&oldid=47894"
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