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Man Pages


Manual Reference Pages  -  ADVPNG (1)

NAME

advpng - AdvanceCOMP PNG Compression Utility

CONTENTS

Synopsis
Description
Options
Copyright
See Also

SYNOPSIS

advpng [-l, --list] [-z, --recompress] [-0, --shrink-0]

        [-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 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 [dq]fast[dq] using the zlib compressor.
-2, --shrink-normal
  Set the compression level to [dq]normal[dq] using the 7z compressor. This is the default level of compression.
-3, --shrink-extra
  Set the compression level to [dq]extra[dq] using the 7z compressor. You can define the compressor iterations with the -i, --iter option.
-4, --shrink-insane
  Set the compression level to [dq]insane[dq] using the zopfli compressor. 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.

COPYRIGHT

This file is Copyright (C) 2002 Andrea Mazzoleni, Filipe Estima

SEE ALSO

advzip(1), advmng(1), advdef(1)
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ADVANCECOMP PNG COMPRESSION UTILITY (1) -->

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