Jpeginfo v1.7.1 Copyright (c) 1995-2023, Timo Kokkonen. 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 * *) No longer actively tested on these operating systems. 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-1.7.1.tar.gz | tar xf - cd jpeginfo-1.7.1 ./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 options, fix -j option, lot of code cleanup by Kurt Schwehr, other minor fixes. 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 29-Oct-2023