NAME
jpeginfo - prints information and tests integrity of JPEG/JFIF files.
SYNOPSIS
jpeginfo [ options ] [ filenames ]
DESCRIPTION
jpeginfo is used to generate informative listings of jpeg files, and
also to check jpeg files for errors. Program also supports automatic
deletion of broken jpegs.
OPTIONS
Options may be either the traditional POSIX one letter options, or the
GNU style long options. POSIX style options start with a single ‘‘-’’,
while GNU long options start with ‘‘--’’.
Options offered by jpeginfo are the following:
-c, --check
Check files also for errors. (default is just to read the
headers).
-C, --comments
Display file comments (from COM markers).
-d, --delete
Delete files that have errors. (default is not to delete any
files).
-f<filename>, --file<filename>
Read filenames to process from given file. To use standard input
(stdin) use ’-’ as a filename. This is alternative to default
where filenames are given as parameters to the program.
-h, --help
Display short usage information and exits.
-5, --md5
Calculates MD5 checksum for each file.
-i, --info
Displays even more information about each picture. Prints image
coding (Huffman/Arithmetic), density (in dpi/dpc), and whether
CCIR601 sampling was used or not.
-l, --lsstyle
Uses alternate listing format (ls -l style).
-v, --verbose
Enables verbose mode (positively chatty).
--version
Displays program version.
-q, --quiet
Quiet mode, output just the jpeg infos.
-m<mode>, --mode=<mode>
Sets the delete mode, meaningful only when used with -d flag.
Mode can be one of the following:
all files containing any type of errors/warnings, not
necessarily preventing the decoding. (default)
erronly
only files with serious errors (ie. cannot be decoded at
all).
BUGS
None, so far :-)
SEE ALSO
jpegoptim(1)
AUTHOR
Timo Kokkonen (tjko@jyu.fi)
COPYING
Copyright (C) 1996-1998 Timo Kokkonen
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2 of the License, or (at your
option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 675 Mass Ave, Cambridge, MA 02139, USA.