Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help
AdvanceCOMP PNG	Compression General(CommAdvanceCOMP 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] [-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 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.

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

SEE ALSO
       advzip(1), advmng(1), advdef(1)

					AdvanceCOMP PNG	Compression Utility(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | COPYRIGHT | SEE ALSO

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=advpng&sektion=1&manpath=FreeBSD+13.0-RELEASE+and+Ports>

home | help