The AdvanceDEFLATE recompression utility
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Synopsis
advdef [-z, --recompress] [-0, --shrink-store]
[-1, --shrink-fast] [-2, --shrink-normal] [-3, --shrink-extra]
[-4, --shrink-insane] [-f, --force] [-q, --quiet]
[-h, --help] [-V, --version] FILES...
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Description
The main purpose of this utility is to recompress the
data present in the .png, .mng, .gz, .tgz and .svgz
files.
The internal structure of the files isn't changed.
Only the compressed data is modified.
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Options
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-z, --recompress FILES...
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Recompress the specified files. If the -1, -2, -3, -4
options are specified it's used the smallest file
choice from the previous compressed data and the
new compression. If the -0 option is specified the
file is always rewritten without any compression.
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-0, --shrink-store
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Disable the compression. The file is
only stored and not compressed. The file is always
rewritten also if it's bigger.
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-1, --shrink-fast
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Set the compression level to "fast".
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-2, --shrink-normal
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Set the compression level to "normal". This is the
default level of compression.
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-3, --shrink-extra
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Set the compression level to "extra".
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-4, --shrink-insane
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Set the compression level to "insane". It's VERY
SLOW.
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-f, --force
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Force the use of the new file also if it's bigger.
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Limitations
The advdef program cannot be used to recompress huge files
because it needs to allocate memory for both the complete
compressed and uncompressed data.
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Copyright
This file is Copyright (C) 2003, 2004 Andrea Mazzoleni
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See Also
advpng(1), advmng(1), advzip(1), gzip(1), bzip2(1)