png-fix-IDAT-windowsize(1)

utility to reset first IDAT's zlib window-size bytes and fix up CRC to match.

Section 1 pngcheck bookworm source

Description

png-fix-IDAT-windowsize - utility to reset first IDAT’s zlib window-size bytes and fix up CRC to match.

png-fix-IDAT-windowsize [options] pngfile [pngfile ...]

png-fix-IDAT-windowsize, version 1.0 of 31 October 2020, by Greg Roelofs.

Uses explicit, hardcoded compression settings and line filters, writing result to output file with extension "-fixed.png".

This software is licensed under the GNU General Public License. There is NO warranty.

-force

overwrite existing output files

-verbose

print more status messages (synonym: -noquiet)