pngchunks(1) [debian man page]
PNGCHUNKS(1) General Commands Manual PNGCHUNKS(1) 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)
Check Out this Related Man Page
pngcheck(1) 2012-03-09 pngcheck(1) NAME
pngcheck - Test PNG image files for corruption, display size, type, compression info SYNOPSIS
pngcheck [-vqt7f] file.png [file.png [...]] pngcheck [-vqt7f] file.mng [file.mng [...]] pngcheck -{sx}[vqt7f] file-containing-PNGs... ... | pngcheck [-sx][vqt7f] OPTIONS
-v test verbosely (print most chunk data). -q test quietly (only output errors). -t print contents of tEXt chunks (can be used with -q). -7 print contents of tEXt chunks, escape chars >=128 (for 7-bit terminals). -p Print contents of PLTE, tRNS, hIST, sPLT and PPLT (can be used with -q). -f Force continuation even after major errors. -s Search for PNGs within another file. -x Search for PNGs and extract them when found. DESCRIPTION
pngcheck is the official PNG tester and debugger. Originally designed simply to test the CRCs within a PNG image file (e.g., to check for ASCII rather than binary transfer), it has been extended to check and optionally print almost all the information about a PNG image and to verify that it conforms to the PNG specification. It also includes partial support for MNG animations. It can dump the chunk-level information in the image in human-readable form. For example, it can be used to print the basic stats about an image (dimen sions, bit depth, etc.); to list the color and transparency info in its palette; or to extract the embedded text annotations. All PNG and JNG chunks are supported, plus almost all MNG chunks (everything but PAST, DISC, tERm, DROP, DBYK, and ORDR). This is a command-line program with batch capabilities (e.g., pngcheck *.png). ENVIRONMENT
None. FILES
None. SEE ALSO
pngchunkdesc(1) pngchunks(1) pngcomp(1) pngcp(1) pngcrush(1) pnginfo(1) pngmeta(1) pngnq(1) pngquant(1) AUTHORS
Program was written by <foo@example.com>. This manual page was written by Kevin M. Rosenberg <kmr@debian.org> for the Debian GNU system (but may be used by others). Updated by Jari Aalto <jari.aalto@cante.net>. Released under license GNU GPL v2 or (at your option) any later version. For more information about license, visit <http://www.gnu.org/copyleft/gpl.html>. pngcheck 2012-02-14 pngcheck(1)