Ubuntu Manpage: exif - shows EXIF information in JPEG files

NAME

       exif - shows EXIF information in JPEG files

SYNOPSIS

       exif [ OPTION ] [ file... ]

DESCRIPTION

       exif is a small command-line utility to show and change EXIF information in JPEG files.

       Most  digital  cameras  produce EXIF files, which are JPEG files with extra tags that contain information
       about the image. The exif command-line utility allows you to read EXIF information from  and  write  EXIF
       information to those files.  exif internally uses the libexif library.

       Each  input  file given on the command line is acted upon in turn, using all the options given. Execution
       will be aborted immediately if one file is not readable or does not contain EXIF tags.

       As EXIF tags are read, any unknown ones are discarded and known ones are automatically converted into the
       correct format, if they aren't already.  Corrupted MakerNote tags are also removed, but no format changes
       are made.

OPTIONS

-v, --version
Display the exif version number.

-i, --ids
Show ID numbers instead of tag names.

-t, --tag=TAG
Select only this TAG. TAG is the tag title, the short tag name, or the tag number (hexadecimal
numbers are prefixed with 0x), from the IFD specified with --ifd. The tag title is dependent on
the current locale, whereas name and number are locale-independent.

--ifd=IFD
Select a tag or tags from this IFD. Valid IFDs are "0", "1", "EXIF", "GPS", and
"Interoperability". Defaults to "0".

-l, --list-tags
List all known EXIF tags and IFDs. A JPEG image must be provided, and those tags which appear in
the file are shown with an asterisk in the corresponding position in the list.

-|, --show-mnote
Show the contents of the MakerNote tag. The contents of this tag are nonstandard (and often
undocumented) and may therefore not be recognized, or if they are recognized they may not
necessarily be interpreted correctly.

--remove
Remove the tag or (if no tag is specified) the entire IFD.

-s, --show-description
Show description of tag. The --tag option must also be given.

-e, --extract-thumbnail
Extract the thumbnail, writing the thumbnail image to the file specified with --output.

-r, --remove-thumbnail
Remove the thumbnail from the image, writing the new image to the file specified with --output.

-n, --insert-thumbnail=FILE
Insert FILE as thumbnail. No attempt is made to ensure that the contents of FILE are in a valid
thumbnail format.

--no-fixup
Do not attempt to fix EXIF specification violations when reading tags. When used in conjunction
with --create-exif, this option inhibits the creation of the mandatory tags. exif will otherwise
remove illegal or unknown tags, add some mandatory tags using default values, and change the data
type of some tags to match that required by the specification.

-o, --output=FILE
Write output image to FILE. If this option is not given and an image file must be written, the
name used is the same as the input file with the suffix ".modified.jpeg".

--set-value=VALUE
Set the data for the tag specified with --tag and --ifd to VALUE. Compound values consisting of
multiple components are separated with spaces.

-c, --create-exif
Create EXIF data if it does not exist. Mandatory tags are created with default values unless the
--no-fixup option is given. This option can be used instead of specifying an input file name in
most cases, to operate on the default values of the mandatory set of EXIF tags. In this case, the
--output option has no effect and no file is written.

-m, --machine-readable
Produce output in a machine-readable (tab-delimited) format. The --xml-output and
--machine-readable options are mutually exclusive.

-w, --width=N
Set the maximum width of the output to N characters (default 80). This does not apply to some
output formats (e.g. XML).

-x, --xml-output
Produce output in an XML format (when possible). The --xml-output and --machine-readable options
are mutually exclusive. Note that the XML schema changes with the locale, and it sometimes
produces invalid XML. This option is not recommended.

-d, --debug
Show debugging messages. Also, when processing a file that contains corrupted data, this option
causes exif to attempt to continue processing. Normally, corrupted data causes an abort.

Help options
-?, --help
Show help message.

--usage
Display brief usage message.

EXAMPLES

       Display all recognized EXIF tags in an image and the tag contents, with bad tags fixed:

              exif image.jpg

       Display a table listing all known EXIF tags and whether each one exists in the given image:

              exif --list-tags --no-fixup image.jpg

       Display details on all XResolution tags found in the given image:

              exif --tag=XResolution --no-fixup image.jpg

       Display the raw contents of the "Model" tag in the given image (with a newline character appended):

              exif --ifd=0 --tag=Model --machine-readable image.jpg

       Extract the thumbnail into the file thumbnail.jpg:

              exif --extract-thumbnail --output=thumbnail.jpg image.jpg

       Display a list of the numeric values of only the EXIF tags in the thumbnail  IFD  (IFD  1)  and  the  tag
       values:

              exif --ids --ifd=1 --no-fixup image.jpg

       Display the meaning of tag 0x9209 in the "EXIF" IFD according to the EXIF specification:

              exif --show-description --ifd=EXIF --tag=0x9209

       Add  an  Orientation  tag  with  value  "Bottom-left" (4) to an existing image, leaving the existing tags
       untouched:

              exif --output=new.jpg --ifd=0 --tag=0x0112 --set-value=4 --no-fixup image.jpg

       Add a YCbCr Sub-Sampling tag with value 2,1 (a.k.a YCbCr 4:2:2) to an existing image and fix the existing
       tags, if necessary:

              exif --output=new.jpg --tag=YCbCrSubSampling --ifd=0 --set-value='2 1' image.jpg

       Remove the "User Comment" tag from an image:

              exif --output=new.jpg --remove --tag="User Comment" --ifd=EXIF image.jpg

       Display a table with all known EXIF tags, highlighting mandatory ones:

              exif -cl

AUTHOR