lepton
LZMA
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lepton
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JPEG XL: How It Started, How It’s Going
JPEG XL can losslessy transcode JPEG into a smaller format. JPEG2000 (or WebP or anything but Lepton[0]) didn't offer that. Besides, we have gif and png for approximately the same space. gif still isn't gone. Displacement isn't necessary for a new format to become useful.
[0] https://github.com/dropbox/lepton
- Jpeg Compression with Dropbox's Lepton
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Too bad this isn’t digitized. Would totally hoard it!
We also use https://github.com/dropbox/lepton to save disk storage. It give 20% saving in our experience.
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Questions about establishing a photography backup/storage system
It may not be directly related to your question, but Dropbox has developed a great open source software called Lepton. It is able to compress JPEGs losslessly and saves on average about 22% of storage space. The files are not readable after compression without decompression, but since your focus seems to be on archiving anyway, it might be handy. And for larger collections of high-resolution images, it can actually save a decent amount of storage space.
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AVIF support enabled by default in Firefox 86
Just wondering, is there a "lossless" conversion from PNG/JPEG/etc to AVIF? Kinda like Lepton[1] but just re-compressing without further loss of details.
[1] https://github.com/dropbox/lepton
LZMA
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ELI5: How exactly does winrar profit without a major loss with their current business plan?
Their SDK is in the public domain though.
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Searching Compressed Space
And that links to https://www.7-zip.org/sdk.html , in the download there see the DOC folder for documentation? I really can't figure out how that somehow 'sends you back to python's lzma'...
What are some alternatives?
brunsli - Practical JPEG Repacker
zstd - Zstandard - Fast real-time compression algorithm
ImageMagick - 🧙♂️ ImageMagick 7
LZ4 - Extremely Fast Compression algorithm
zpaqfranz - Deduplicating archiver with encryption and paranoid-level tests. Swiss army knife for the serious backup and disaster recovery manager. Ransomware neutralizer. Win/Linux/Unix
ZLib - A massively spiffy yet delicately unobtrusive compression library.
kanzi-cpp - Fast lossless data compression in C++
brotli - Brotli compression format
Racjin-de-compression - Compression and decompression algorithms used in old PS2/PSP/Wii games by Racjin
Snappy - A fast compressor/decompressor
compressonator - Tool suite for Texture and 3D Model Compression, Optimization and Analysis using CPUs, GPUs and APUs
LZHAM - Lossless data compression codec with LZMA-like ratios but 1.5x-8x faster decompression speed, C/C++