1AdvanceCOMP Deflate CompressiGoenneUrtailliCAtodymv(ma1an)ncdesCOMMaPnuDaelflate Compression Utility(1)
2
3
4

NAME

6       advdef - AdvanceCOMP Deflate Compression Utility
7

SYNOPSIS

9       advdef [-z, --recompress] [-0, --shrink-store]
10            [-1, --shrink-fast] [-2, --shrink-normal] [-3, --shrink-extra]
11            [-4, --shrink-insane] [-i, --iter N]
12            [-f, --force] [-q, --quiet]
13            [-h, --help] [-V, --version] FILES...

DESCRIPTION

15       The  main  purpose of this utility is to recompress the data present in
16       the .png, .mng, .gz, .tgz and .svgz files.
17
18       The internal structure of the files isn´t changed.  Only the compressed
19       data is modified.
20

OPTIONS

22       -z, --recompress FILES...
23              Recompress  the  specified  files. If the -1, -2, -3, -4 options
24              are specified it´s used the smallest file choice from the previ‐
25              ous compressed data and the new compression. If the -0 option is
26              specified the file is always rewritten without any compression.
27
28       -0, --shrink-store
29              Disable the compression. The file is only stored  and  not  com‐
30              pressed. The file is always rewritten also if it´s bigger.
31
32       -1, --shrink-fast
33              Set the compression level to "fast" using the zlib compressor.
34
35       -2, --shrink-normal
36              Set  the compression level to "normal" using the libdeflate com‐
37              pressor.  This is the default level of compression.
38
39       -3, --shrink-extra
40              Set the compression level to "extra" using  the  7z  compressor.
41              You  can  define  the  compressor iterations with the -i, --iter
42              option.
43
44       -4, --shrink-insane
45              Set the compression level to "insane" using the zopfli  compres‐
46              sor.   You  can  define  the  compressor iterations with the -i,
47              --iter option.
48
49       -i, --iter N
50              Define an additional numer of iterations for the 7z  and  zopfli
51              compressors for modes -3 and -4.  More iterations usually give a
52              better compression, but may require a lot more  time.   Try  for
53              example with 10, 15, 20, and so on.
54
55       -f, --force
56              Force the use of the new file also if it´s bigger.
57

LIMITATIONS

59       The  advdef  program cannot be used to recompress huge files because it
60       needs to allocate memory for both the complete  compressed  and  uncom‐
61       pressed data.
62

64       This file is Copyright (C) 2003, 2004 Andrea Mazzoleni
65

SEE ALSO

67       advpng(1), advmng(1), advzip(1), gzip(1), bzip2(1)
68
69
70
71                                    AdvanceCOMP Deflate Compression Utility(1)
Impressum