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JPEGINFO(1) JPEGINFO(1)
NNAAMMEE
jpeginfo - prints information and tests integrity of
JPEG/JFIF files.
SSYYNNOOPPSSIISS
jjppeeggiinnffoo [ ooppttiioonnss ] [ ffiilleennaammeess ]
DDEESSCCRRIIPPTTIIOONN
_j_p_e_g_i_n_f_o 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.
OOPPTTIIOONNSS
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 _j_p_e_g_i_n_f_o are the following:
--cc,, ----cchheecckk
Check files also for errors. (default is just to
read the headers).
--dd,, ----ddeelleettee
Delete files that have errors. (default is not to
delete any files).
--ff<<ffiilleennaammee>>,, ----ffiillee<<ffiilleennaammee>>
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.
--hh,, ----hheellpp
Display short usage information and exits.
--55,, ----mmdd55
Calculates MD5 checksum for each file. Exact speci-
fication of the "RSA Data Security, Inc. MD5 Mes-
sage-Digest Algorithm" is in RFC 1321.
--ii,, ----iinnffoo
Displays even more information about each picture.
Prints image coding (Huffman/Arithmetic), density
(in dpi/dpc), and whether CCIR601 sampling was used
or not.
--ll,, ----llssssttyyllee
Uses alternate listing format (ls -l style).
19 Aug 1997 1
JPEGINFO(1) JPEGINFO(1)
--vv,, ----vveerrbboossee
Enables verbose mode (positively chatty).
--qq,, ----qquuiieett
Quiet mode, output just the jpeg infos.
--mm<<mmooddee>>,, ----mmooddee==<<mmooddee>>
Sets the delete mode, meaningful only when used with
_-_d flag. _M_o_d_e can be one of the following:
aallll files containing any type of errors/warnings,
not nessessary preventing the decoding.
(default)
eerrrroonnllyy
only files with serious errors (ie. cannot be
decoded at all).
BBUUGGSS
None, so far :-)
SSEEEE AALLSSOO
jpegoptim(1)
AAUUTTHHOORR
Timo Kokkonen (tjko@jyu.fi)
CCOOPPYYIINNGG
Copyright (C) 1996,1997 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.
19 Aug 1997 2
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