Provided by: jpeginfo_1.7.1+dfsg-1build1_amd64 bug

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.

OUTPUT FORMATS

       jpeginfo supports several different output  formats.  Default  formats  are  meant  to  be
       displayed  on screen, while there is also CSV and JSON formats that are easier to parse by
       another program.

       While CSV and JSON formats always display  all  "columns",  other  formats  don't  display
       columns  that  do  not  have  any data. For example if -c option is not used to check JPEG
       integrity, then the `status` (and `details`) columns won't be displayed.

       Similarly if MD5/SHA-2 checksum (hash) is not calculated, then that  column  will  not  be
       shown.

   Default Format
       Default output format:

       <filename>  <image_width>  x <image_height> <colordepth> <progressive_vs_normal> <markers>
       <size>

       Example:

       $ jpeginfo *.jpeg
       IMG_1439.jpeg                    3282 x 3024 24bit N JFIF,Exif                2961607
       IMG_1560.jpeg                    3815 x 2862 24bit N JFIF                     1045063
       IMG_2520.jpeg                    3964 x 2900 24bit N JFIF,Exif,ICC            4712099

   Extra information format
       Additional information can be displayed using -i option:

       <filename> <image_width> x <image_height> <colordepth>  <progressive_vs_normal>  <markers>
       <extra_info> <size>

       Example:

       $ jpeginfo -i *.jpeg
       IMG_1439.jpeg                         3282      x      3024      24bit     N     JFIF,Exif
       Huffman,300dpi       2961607
       IMG_1560.jpeg                         3815      x      2862       24bit       N       JFIF
       Huffman,300dpi       1045063
       IMG_2520.jpeg                        3964     x     2900     24bit     N     JFIF,Exif,ICC
       Huffman,300dpi       4712099

   Ls command style output format
       Option -l moves filename to be last column, resulting output that is bit like output  from
       `ls -l` command:

       <image_width>  x  <image_height>  <colordepth>  <progressive_vs_normal>  <markers>  <size>
       <filename>

       Example:

       $ jpeginfo -l *.jpeg
       3282 x 3024 24bit N JFIF,Exif                2961607 IMG_1439.jpeg
       3815 x 2862 24bit N JFIF                     1045063 IMG_1560.jpeg
       3964 x 2900 24bit N JFIF,Exif,ICC            4712099 IMG_2520.jpeg

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.

       -H, --header
             Display column names header in output.

       -2, --sha256
             Calculates SHA-256 checksum for each file.

       --sha512
             Calculates SHA-512 checksum for each file.

       -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.

       -j, --json
             JavaScript Object Notation (JSON) output format.

       -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.

       -s, --csv
             Comma separated values (CSV) output format.

       -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 necessary preventing the
                    decoding. (default)

             erronly
                    Only files with serious errors (i.e. cannot be decoded at all).

       -, --stdin
             Read input from standard input (instead of a file).

Known JPEG Markers

       jpegoptim scans through application (APP) markers in  the  JPEG  image  and  will  display
       information  about  "well  known"  markers  found in the image. Markers found in image are
       listed in the "markers" column.

   Known Application Markers
       Currently jpegoptim recognizes following common application markers found in JPEG images:

                   ┌────────────┬────────────────────────────────────────────┐
                   │Marker Name │                Description                 │
                   ├────────────┼────────────────────────────────────────────┤
                   │JFIF        │ JPEG File Interchange Format               │
                   │JFXX        │ JFIF Extension                             │
                   │Exif        │ Exchangeable Image File Format             │
                   │XMP         │ Extensible Metadata Platform (Adobe)       │
                   │ICC         │ ICC Color Profile                          │
                   │IPTC        │ IPTC (Adobe Photoshop)                     │
                   │Adobe       │ Adobe                                      │
                   │AdobeCM     │ Adobe Color Management                     │
                   │CIFF        │ Canon Raw                                  │
                   │AVI1        │ AVI Video                                  │
                   │QVCI        │ Casio QVCI                                 │
                   │FLIR        │ FLIR                                       │
                   │FPXR        │ Kodak FlashPix                             │
                   │MPF         │ CIPA Multi-Picture Format                  │
                   │Meta        │ Kodak Meta                                 │
                   │Stim        │ CIPA Stereo Still Image                    │
                   │JPS         │ JPEG Stereo Image                          │
                   │Scalado     │ Scalado                                    │
                   │RMETA       │ Ricoh Meta                                 │
                   │EPPIM       │ Toshiba PrintIM                            │
                   │NITF        │ National Imagery Transmission Format       │
                   │GoPro       │ GoPro                                      │
                   │SPIFF       │ JPEG Still Picture Interchange File Format │
                   │AROT        │ Apple                                      │
                   │HDR         │ JPEG-HDR                                   │
                   └────────────┴────────────────────────────────────────────┘

   Other Markers
       If image contained any unrecognized application (APP) markers then "UNKNOWN" is  added  to
       the list of found markers.

       Additionally  if image contained any comment (COM) markers then "COM" is added to the list
       of found markers.

EXIT STATUS

       Program returns 0 on successful run. Non-zero exit status is returned if  there  were  any
       errors.

       When  using  --check  (or  -c) option return value is non-zero if one or more of the files
       checked had any errors.

SEE ALSO

       jpegoptim(1)

AUTHOR

       Timo Kokkonen (tjko@iki.fi)

COPYING

       Copyright (C) 1995-2023  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 3 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,   see
       <https://www.gnu.org/licenses/>.