advdef ‐ AdvanceCOMP Deflate Compression Utility
advdef [‐z, ‐‐recompress] [‐0, ‐‐shrink‐store]
[‐1, ‐‐shrink‐fast] [‐2, ‐‐shrink‐normal] [‐3, ‐‐shrink‐extra]
[‐4, ‐‐shrink‐insane] [‐f, ‐‐force] [‐q, ‐‐quiet]
[‐h, ‐‐help] [‐V, ‐‐version] FILES...
The main purpose of this utility is to recompress the data present in
the .png, .mng, .gz, .tgz and .svgz files.
The internal structure of the files isn’t changed. Only the compressed
data is modified.
‐z, ‐‐recompress FILES...
Recompress the specified files. If the ‐1, ‐2, ‐3, ‐4 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
Disable the compression. The file is only stored and not
compressed. The file is always rewritten also if it’s bigger.
Set the compression level to ˝fast˝.
Set the compression level to ˝normal˝. This is the default level
Set the compression level to ˝extra˝.
Set the compression level to ˝insane˝. It’s VERY SLOW.
Force the use of the new file also if it’s bigger.
The advdef program cannot be used to recompress huge files because it
needs to allocate memory for both the complete compressed and
This file is Copyright (C) 2003, 2004 Andrea Mazzoleni
advpng(1), advmng(1), advzip(1), gzip(1), bzip2(1)
AdvanceCOMP Deflate Compression Utility(1)