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Questions tagged [jpeg-xl]

JPEG XL (JXL) is a royalty-free raster image file format for lossy and lossless compression. Not to be confused with JPEG (JPG).

JPEG XL is a royalty-free raster image file format for lossy and lossless compression. The file format and coding system were standardised in 2021/2022.

Not to be confused with the much older legacy format, a lossy compression format dating back to 1992.

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JPEG-XL: How many VarDCT implementations are there?

I am looking at the following innocent looking command line: % cjxl flower.png flower.jxl [...] Encoding [Container | VarDCT, d1.000, effort: 7 | 3332-byte XMP], Using the exact same source code but compiled on different architectures, here is…
malat
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JPEG-XL: Handling of palette in libjxl command line tools

I am trying to make sense of the following presentation, see page 27: Could someone please describe the command line tools available in libjxl that can help me work with existing palettes ? I tried a naive: % convert -size 512x512 -depth 8 xc:white…
malat
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JPEG-XL: Does lossless mode supports 32bits float?

I am trying to make sense of the following sentence (quote from here): ✓ Lossless up to 32 bits per channel (float or int) My question is: can I store arbitrary 32-bit IEEE 754 single-precision floating point values in JPEG-XL ? Starring at the…
malat
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Decrypting Image Headers for WebP, JPEG XL, HEIF, AVIF image formats using Python

I want to decode and understand the structure of various latest image formats (namely WebP, JPEG XL, HEIF and AVIF) and compare header information with respect to image data to see which format is header information heavy with respect to image data.…
Namrata Devata
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Muxing multiple JPEG into a JXL animation

Using ffmpeg I can mux multiple JPEG into a M-JPEG container without any loss since it is a just a plain bitstream copy: ffmpeg -framerate 30 -i input%03d.jpg -codec copy output.mjpeg Recently linux distributions started to offer JPEG-XL command…
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Can I install jpeg-xl on MacOS 10.14 Mojave?

I am attempting to install vips using Homebrew which has jpeg-xl as a dependency. I am aware that the OS is old and unsupported but I am hoping to make it work a little while longer. Wondering if there is some other way to get jpeg-xl installed or…
jcanipar
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JPEG XL error when installing PHP on macOS with brew

cmake -S . -B build -DJPEGXL_FORCE_SYSTEM_BROTLI=ON -DJPEGXL_FORCE_SYSTEM_LC ==> cmake --build build Last 15 lines from /Users/user/AndroidStudioProjects/chatbox/Library/Logs/Homebrew/jpeg-xl/02.cmake: cd…
Kelvin Maxwell
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