JPEG XL

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== Identification ==
 
== Identification ==
Based on the [https://gitlab.com/wg1/jpeg-xl/-/blob/master/jxl/dec_file.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}}.
 
Codestreams may also be wrapped in an ISOBMFF-based file format ([https://gitlab.com/wg1/jpeg-xl/-/blob/master/tools/box/box.cc implementation]).
 
Codestreams may also be wrapped in an ISOBMFF-based file format ([https://gitlab.com/wg1/jpeg-xl/-/blob/master/tools/box/box.cc implementation]).
  

Revision as of 16:25, 11 September 2021

File Format
Name JPEG XL
Ontology
Extension(s) .jxl
MIME Type(s) image/jxl
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

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).

Specifications

Software

Sample files

Links

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