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exif(1)		       command line front-end to libexif	       exif(1)

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 informa-
       tion in JPEG files.

       Most digital cameras produce EXIF files,	which are JPEG files with  ex-
       tra  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 al-
       ready.	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-inde-
	      pendent.

       --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 pro-
	      vided, 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	neces-
	      sarily 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	other-
	      wise remove illegal or unknown tags, add some mandatory tags us-
	      ing  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 in-
	      put 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  cre-
	      ated  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  ef-
	      fect 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 ex-
	      clusive.

       -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-out-
	      put 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 con-
	      tains corrupted data, this option	causes exif to attempt to con-
	      tinue 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" 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

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

	      exif -cl

AUTHOR
       exif was	written	by Lutz	Mueller	<lutz@users.sourceforge.net>  and  nu-
       merous  contributors.   This man	page is	Copyright (C) 2002-2012	Thomas
       Pircher,	Dan Fandrich and others.

SEE ALSO
       http://www.sourceforge.net/projects/libexif

exif 0.6.21			  2012-06-27			       exif(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | AUTHOR | SEE ALSO

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