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.IX Title "apngopt 1"
.TH apngopt 1 2024-03-09 "apngopt" "User Commands"
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.SH NAME
apngopt \- optimize animated PNG image files
.SH SYNOPSIS
.IX Header "SYNOPSIS"
apngopt [options] anim.png [anim_opt.png]
.SH DESCRIPTION
.IX Header "DESCRIPTION"
After converting impage to APNG with e.g. \fBgif2apng\fR\|(1), the files size
can further be reduced with this utility.
.PP
The Animated Portable Network Graphics (APNG) file format is an
extension to the Portable Network Graphics (PNG) specification. It
allows for animated PNG files that work similarly to animated GIF
files, while retaining backward compatibility with non-animated PNG
files and adding support for 8\-bit transparency and 24\-bit images.
.SH OPTIONS
.IX Header "OPTIONS"
\&\-z0  : zlib compression
.PP
\&\-z1  : 7zip compression (default)
.PP
\&\-z2  : zopfli compression
.PP
\&\-i## : number of iterations, default \-i15
.SH STANDARDS
.IX Header "STANDARDS"
APNG Specification: https://wiki.mozilla.org/APNG_Specification
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBapngopt\fR\|(1)
\&\fBapng2gif\fR\|(1)
\&\fBgif2apng\fR\|(1)
\&\fBgifsicle\fR\|(1)
\&\fBgifview\fR\|(1)
\&\fBoptipng\fR\|(1)
\&\fBpngcheck\fR\|(1)
\&\fBpngcrush\fR\|(1)
\&\fBpnginfo\fR\|(1)
\&\fBpngnq\fR\|(1)
\&\fBpngquant\fR\|(1)
.SH AUTHORS
.IX Header "AUTHORS"
Program was written by Max Stepi <maxst@users.sourceforge.net>
.PP
This manual page was written by Jari Aalto <jari.aalto@cante.net>.
Released under license GNU GPL version 2 or (at your option) any later
version. For more information about license, visit
<http://www.gnu.org/copyleft/gpl.html>.