NAME

       pngchunks - print information embedded into a PNG file

SYNOPSIS

       pngchunks file

DESCRIPTION

       pngchunks  is  a  program  that  displays informations from files created according to the
       Portable Network Graphics file format.

EXAMPLE

       pngchunks input.png Chunk: Data Length 13 (max 2147483647), Type 1380206665 [IHDR]
         Critical, public, PNG 1.2 compliant, unsafe to copy
         IHDR Width: 256
         IHDR Height: 256
         IHDR Bitdepth: 8
         IHDR Colortype: 2
         IHDR Compression: 0
         IHDR Filter: 0
         IHDR Interlace: 0
         IHDR Compression algorithm is Deflate
         IHDR Filter method is type zero (None, Sub, Up, Average, Paeth)
         IHDR Interlacing is disabled
         Chunk CRC: -753909967 Chunk: Data Length 6 (max 2147483647), Type 1145523042 [bKGD]
         Ancillary, public, PNG 1.2 compliant, unsafe to copy
         ... Unknown chunk type
         Chunk CRC: 554438993 Chunk: Data Length 9 (max 2147483647), Type 1935231088 [pHYs]
         Ancillary, public, PNG 1.2 compliant, safe to copy
         ... Unknown chunk type
         Chunk CRC: -757235972 Chunk: Data Length 7 (max 2147483647), Type 1162692980 [tIME]
         Ancillary, public, PNG 1.2 compliant, unsafe to copy
         ... Unknown chunk type
         Chunk CRC: 429243611 Chunk: Data Length 831 (max 2147483647), Type 1413563465 [IDAT]
         Critical, public, PNG 1.2 compliant, unsafe to copy
         IDAT contains image data
         Chunk CRC: 1406256926 Chunk: Data Length 0 (max 2147483647), Type 1145980233 [IEND]
         Critical, public, PNG 1.2 compliant, unsafe to copy
         IEND contains no data
         Chunk CRC: -1371381630

SEE ALSO

       pngchunkdesc(1), pngcp(1), pnginfo(1).

AUTHOR

       pngchunks was written by Michael Still <mikal@stillhq.com>.

       This manual page was written by Nelson A. de Oliveira <naoliv@debian.org>, for the  Debian
       project (but may be used by others).

                                 Tue, 31 Jul 2007 17:55:51 -0300                     PNGCHUNKS(1)