AdvanceCOMP Deflate CompressGenerallAdvanceCOMPnDeflate Compression Utility(1) NAME advdef - AdvanceCOMP Deflate Compression Utility SYNOPSIS advdef [-z, --recompress] [-0, --shrink-store] [-1, --shrink-fast] [-2, --shrink-normal] [-3, --shrink-extra] [-4, --shrink-insane] [-i, --iter N] [-f, --force] [-q, --quiet] [-h, --help] [-V, --version] FILES... 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. OPTIONS -z, --recompress FILES... Recompress the specified files. If the -1, -2, -3, -4 options are specified it´s used the smallest file choice from the previ- ous compressed data and the new compression. If the -0 option is specified the file is always rewritten without any compression. -0, --shrink-store Disable the compression. The file is only stored and not com- pressed. The file is always rewritten also if it´s bigger. -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. -f, --force Force the use of the new file also if it´s bigger. LIMITATIONS The advdef program cannot be used to recompress huge files because it needs to allocate memory for both the complete compressed and uncom- pressed data. COPYRIGHT This file is Copyright (C) 2003, 2004 Andrea Mazzoleni SEE ALSO advpng(1), advmng(1), advzip(1), gzip(1), bzip2(1) AdvanceCOMP Deflate Compression Utility(1)
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