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

jpeginfo [ options ] [ filenames ]

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 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 nessessary preventing the decoding. (default)

erronly

only files with serious errors (ie. cannot be decoded at all).

None, so far :-)

jpegoptim(1)

Timo Kokkonen (tjko@jyu.fi)

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.