AdvanceCOMP ZIP Compression General(CommAdvanceCOMP ZIP Compression Utility(1)
NAME
advzip - AdvanceCOMP ZIP Compression Utility
SYNOPSIS
advzip [-a, --add] [-x, --extract] [-l, --list]
[-z, --recompress] [-t, --test] [-0, --shrink-store]
[-1, --shrink-fast] [-2, --shrink-normal] [-3, --shrink-extra]
[-4, --shrink-insane] [-i, --iter N]
[-k, --keep-file-time] [-p, --pedantic] [-q, --quiet]
[-h, --help] [-V, --version] ARCHIVES... [FILES...]
DESCRIPTION
The main purpose of this utility is to recompress and test the zip ar-
chives to get the smallest possible size.
For recompression the libdeflate implementation is used. This imple-
mentation generally gives 5-10% more compression than the zLib Deflate
implementation, and it´s also generally faster.
For experimental purpose also the 7-Zip LZMA algorithm is available
with the -N option. In this case, the generated zips WILL NOT BE USABLE
by any other program. To make them usable you need to recompress them
without the -N option. Generally this algorithm gives 10-20% more com-
pression than the zLib Deflate implementation.
OPTIONS
-a, --add ARCHIVE FILES...
Create the specified archive with the specified files. You must
specify only one archive.
-x, --extract ARCHIVE
Extract all the files on the specified archive. You must specify
only one archive.
-l, --list ARCHIVES...
List the content of the specified archives.
-z, --recompress ARCHIVES...
Recompress the specified archives. If the -1, -2, -3, -4 options
are specified, it´s used the smallest file choice from: the pre-
vious compressed data, the new compression and the uncompressed
format. If the -0 option is specified the archive is always
rewritten without any compression.
-t, --test ARCHIVES...
Test the specified archives. The tests may be extended with the
-p option.
-k, --keep-file-time
When recompressing with -z keep the .zip file time.
-p, --pedantic
Be pedantic on the zip tests. If this flag is enabled some more
extensive tests on the zip integrity are done. These tests are
generally not done by other zip utilities.
-0, --shrink-store
Disable the compression. The file is only stored and not com-
pressed. This option is very useful to expand the archives of
.png and .mp3 files. These files are already compressed, trying
to compress them another time is really a waste of time and re-
source.
-1, --shrink-fast
Set the compression level to "fast" using the zlib compressor.
-2, --shrink-normal
Set the compression level to "normal" using the libdeflate com-
pressor. This is the default level of compression.
-3, --shrink-extra
Set the compression level to "extra" using the 7z compressor.
You can define the compressor iterations with the -i, --iter op-
tion.
-4, --shrink-insane
Set the compression level to "insane" using the zopfli compres-
sor. You can define the compressor iterations with the -i,
--iter option.
-i, --iter N
Define an additional numer of iterations for the 7z and zopfli
compressors for modes -3 and -4. More iterations usually give a
better compression, but may require a lot more time. Try for
example with 10, 15, 20, and so on.
COPYRIGHT
This file is Copyright (C) 2002 Andrea Mazzoleni, Filipe Estima
SEE ALSO
advpng(1), advmng(1), advdef(1)
AdvanceCOMP ZIP Compression Utility(1)
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