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<title>The IPTC Command-Line Utility</title>
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<h2><span class="refentrytitle">The IPTC Command-Line Utility</span></h2>
<p>The IPTC Command-Line Utility — how to modify IPTC data from the command-line</p>
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<div class="refsect1">
<a name="command-line"></a><h2>The IPTC Command-Line Utility</h2>
<p>
libiptcdata ships with a companion utility, <span class="application">iptc</span>,
which provides a command-line interface for viewing and modifying the IPTC
data of a JPEG file. Its usage is as follows:
</p>
<pre class="programlisting">
Utility for viewing and modifying the contents of IPTC metadata in images
Usage: iptc [OPTIONS] [FILE]...
Examples:
iptc image.jpg # display the IPTC metadata contained in image.jpg
iptc -m Caption -v "Foo" *.jpg
# set caption "Foo" in all jpegs of the curr. dir.
iptc -a Keywords -v "vacation" *.jpg
iptc -a 2:25 -v "vacation" *.jpg
# either command adds keyword "vacation" to all jpegs
iptc -d Keywords:1 image.jpg
# removes keyword number 1 (the 2nd) from image.jpg
iptc -d Keywords:all image.jpg
# removes all keywords from image.jpg
Operations:
-a, --add=TAG add new tag with identifier TAG
-m, --modify=TAG modify tag with identifier TAG (add if not present)
-v, --value=VALUE value for added/modified tag
-d, --delete=TAG delete tag with identifier TAG
-p, --print=TAG print value of tag with identifier TAG
Options:
-q, --quiet produce less verbose output
-b, --backup backup any modified files
--no-sort do not sort tags before saving
Informative output:
-l, --list list the names of all known tags (i.e. Caption, etc.)
-L, --list-desc=TAG print the name and description of TAG
--help print this help, then exit
--version print iptc program version number, then exit
</pre>
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<p>
The program returns success whenever at least one operation succeeds on
at least one file. The program returns failure when no operation succeeds
on any file. Thus, if you intend to use it in a script and need to know
whether each operation succeeds, only one operation should be performed
at a time so the return value is meaningful for that operation.
</p>
<p>
iptc also serves as an easy way to test the features of the libiptcdata
library, although the library itself has many more features than iptc
exposes. Lastly, the source code of iptc also serves as a reference
for writing other applications that use libiptcdata.
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