NAME
pngcheck - tests PNG, JNG or MNG image files for corruption, and prints size/type info.
SYNOPSIS
pngcheck
[-7cpqtv] file.{png|jng|mng}
[file2.{png|jng|mng} [...]]
... | pngcheck [-7cpqstvx]
pngcheck
[-7cpqstvx] file-containing-PNGs...
DESCRIPTION
PNGcheck, version 3.0.3 of 25 April 2021, by Alexander Lehmann, Andreas Dilger and Greg Roelofs.
Test PNG, JNG or MNG image files for corruption, and print size/type info.
OPTIONS
-7 |
print contents of tEXt chunks, escape chars >=128 (for 7-bit terminals) | ||
-c |
colorize output (for ANSI terminals) | ||
-p |
print contents of PLTE, tRNS, hIST, sPLT and PPLT (can be used with -q) | ||
-q |
test quietly (output only errors) | ||
-s |
search for PNGs within another file | ||
-t |
print contents of tEXt chunks (can be used with -q) | ||
-v |
test verbosely (print most chunk data) | ||
-vv |
test very verbosely (decode & print line filters) | ||
-w |
suppress windowBits test (more-stringent compression check) | ||
-x |
search for PNGs within another file and extract them when found |
NOTE
MNG support is more informational than conformance-oriented.