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

AdvanceCOMP PNG Compression Utility(1)	       General Commands Manual	       AdvanceCOMP PNG Compression Utility(1)

NAME
advpng - AdvanceCOMP PNG Compression Utility
SYNOPSIS
advpng [-l, --list] [-z, --recompress] [-0, --shrink-0] [-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 png files to get the smallest possible size. Please note that this utility is not able to read a generic file. It's granted to be able to read only the files generated by the AdvanceMAME emulator. To compress the files this utility uses the following strategies: o Remove all ancillary chunks. o Concatenate all the IDAT chunks. o Use the 7zip Deflate implementation.
OPTIONS
-l, --list FILES... List the content of the specified files. -z, --recompress FILES... Recompress the specified files. If the -1, -2, -3 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. -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". -f, --force Force the use of the new file also if it's bigger.
COPYRIGHT
This file is Copyright (C) 2002 Andrea Mazzoleni, Filipe Estima
SEE ALSO
advzip(1), advmng(1), advdef(1) AdvanceCOMP PNG Compression Utility(1)


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