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

       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.

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

-force overwrite existing output files

       -verbose
              print more status messages (synonym: -noquiet)

pngcheck(1), pngsplit(1)

png-fix-IDAT-windowsize 1.0                       October 2020                        PNG-FIX-IDAT-WINDOWSIZE(1)

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