gerhobbelt / jpeginfo

jpeginfo - prints information and tests integrity of JPEG/JFIF files

Jpeginfo v1.7.1beta Copyright (c) 1995-2023, Timo Kokkonen.

SYNOPSIS Prints information and tests integrity of JPEG/JFIF files.

REQUIREMENTS Independent JPEG Group's jpeg library (libjpeg) version 6b or later. (Alternatively should also work with libjpeg-turbo or mozjpeg)

TESTED PLATFORMS Linux MacOS Solaris IRIX HP-UX

INSTALLATION Installation should be very straightforward, just unpack the tar file, run configure script, and then compile the program. You may want to do something like this:

	gunzip -c jpeginfo-1.7.0.tar.gz | tar xf -
	cd jpeginfo-1.7.0
	./configure
	make
	make strip
	make install

NOTE! if 'configure' cannot find libjpeg.a or jpeglib.h, then
you must use the --with-jpeglib option when running configure,
see 'configure --help'.

HISTORY v1.7.1 - add --files-from and --files-stdin, minor fixed. v1.7.0 - support for CSV output (--csv), support for JSON output (--json), add support for reading input file from stdin (--stdin), add support for displaying column names (--header), add SHA-512 sigest support (--sha512), other minor fixes. v1.6.2 - add SHA-256 digest support (--sha256 or -2), improved Win32 support thanks to tumagonx, other minor fixes. v1.6.1 - support for new libjpeg v7 thanks to Guido Vollbeding, fix to display of 8bit characters by Pierre Jarillon v1.6.0 - added support for printing out Comments (from COM markers), Exif format images are now also recognized (no Exif marker decoding functionality, though). v1.5 - configuration is now done with GNU autoconf, program now uses free MD5 algorithm, added file size as new field on reports, program now returns exit code 1 if one or more of the jpegs had any errors, useful for testing if particular jpeg is ok from shell scripts, also if you specify -q (--quiet) option twice on command line, then program won't produce any output. v1.4 - added support for calculating MD5 checksums. v1.3 - alternative listing format (-l switch) added. new column on reports displaying whether jpeg is progressive or normal (P/N). new switch -i for printing out even more information about pictures: coding, density, CCIR601 sampling. new switch -f for passing filenames to program from file or stdin. v1.2 - improved support for other platforms, minor fixes v1.1.2 - small fixes, improvements to Makefile v1.1 - modified to use Independent JPEG Group's new v.6a library, minor fixes. v1.0 - first public release

LATEST VERSION

Latest version is always available from:
	http://www.iki.fi/tjko/projects.html

ACKNOWLEDGEMENT

- MD5 message-digest allgorithm used is public domain implementation
  written by Colin Plumb.
- SHA-2 message-digest algorithm used is public domain implementation
  by D. J. Bernstein (from NaCl library).

Timo [email protected] 15-Jan-2023