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CentOS 7.0 - man page for advdef (centos section 1)

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AdvanceCOMP Deflate Compression Utility(1)	       AdvanceCOMP Deflate 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] [-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 previous compressed data and the new com-
	      pression. 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 compressed. The file is
	      always rewritten also if it's bigger.

       -1, --shrink-fast
	      Set the compression level to "fast".

       -2, --shrink-normal
	      Set the compression level to "normal". This is the default level of compression.

       -3, --shrink-extra
	      Set the compression level to "extra".

       -4, --shrink-insane
	      Set the compression level to "insane". It's VERY SLOW.

       -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 uncompressed 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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