precomp-cpp
preflate
| precomp-cpp | preflate | |
|---|---|---|
| 14 | 2 | |
| 391 | 33 | |
| - | - | |
| 0.0 | 10.0 | |
| 2 months ago | over 5 years ago | |
| C | C++ | |
| Apache License 2.0 | Apache License 2.0 |
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precomp-cpp
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Does epub compress well?
You should look at Precomp - an apparently abandoned, but awesomely working arhiver that is dedicated to compressing those ZIP-based formats, and compresses them twice-thrice as small as LZMA2 can.
- Any suggestion for compressing a large batch of photos and videos into a single zip?
- Compression for Documents
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Putting 5,998,794 books on IPFS
You can also have a look at this packer. It compresses PDF and EPUB 2-3 times smaller than 7z at maximum settings, at half the speed. I keep all my books in it and never had a problem.
- .bin compression
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libgen currently adds around 1,300 books a day
There is an opensource archiver called precomp that is designed specifically for e-documents and compresses them 2-3 times smaller than 7z in ultra mode. It works, and I keep my e-books in it. However, it seems nobody else does, and development has stopped due to lack of interest.
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AWS switch from gzip to zstd – about 30% reduction in compressed S3 storage
There are tools like preflate [1] or precomp [2] that guarantees a bitwise identical reconstruction, of course modulo bugs.
[1] https://github.com/deus-libri/preflate
[2] https://github.com/schnaader/precomp-cpp/ (which internally makes use of preflate)
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Which compression method for archiving OS ISOs?
You may use "precomp" in order to seek and uncompress those parts. Then you can use a better compression algorithm : http://schnaader.info/precomp.php
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Is there any research as to what's the best way to compress each file type?
Precomp http://schnaader.info/precomp.php is a program which will seek compressed parts and decompress those parts in order to compress with another algorithm. This greatly improve compression ratio with the other algorithm.
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How can I perfectly recreate a PNG losslessly compressed to JXL?
This may be of help. (a255854 and d649919)
preflate
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Gzip and Brotli Compression Level Estimator
It is actually possible to estimate the compression level without actually compressing everything again, because different levels use different strategies which can be identified in some cases. zlib in particular has three strategies [1] and preflate [2] leverages this to store the deflate stream reconstruction data without much bits.
[1] https://github.com/madler/zlib/blob/21767c6/deflate.c#L134-L...
[2] https://github.com/deus-libri/preflate/blob/master/preflate_...
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AWS switch from gzip to zstd – about 30% reduction in compressed S3 storage
There are tools like preflate [1] or precomp [2] that guarantees a bitwise identical reconstruction, of course modulo bugs.
[1] https://github.com/deus-libri/preflate
[2] https://github.com/schnaader/precomp-cpp/ (which internally makes use of preflate)
What are some alternatives?
PDF-Writer - High performance library for creating, modiyfing and parsing PDF files in C++
vdo - Userspace tools for managing VDO volumes.
clawPDF - Open Source Virtual (Network) Printer for Windows that allows you to create PDFs, OCR text, and print images, with advanced features usually available only in enterprise solutions.
zstd - Zstandard - Fast real-time compression algorithm
p7zip - A new p7zip fork with additional codecs and improvements (forked from https://sourceforge.net/projects/sevenzip/ AND https://sourceforge.net/projects/p7zip/).
minio - The Object Store for AI Data Infrastructure
mcm - MCM file compressor
ZLib - A massively spiffy yet delicately unobtrusive compression library.
xdelta - open-source binary diff, delta/differential compression tools, VCDIFF/RFC 3284 delta compression
qpdf-rs - Rust bindings for QPDF C++ library
libharu - libharu - free PDF library
pixz - Parallel, indexed xz compressor