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: • Remove all ancillary chunks. • Concatenate all the IDAT chunks. • 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)
Generated by dwww version 1.15 on Thu Jun 20 12:46:17 CEST 2024.