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