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<p>Javier,</p>
<p>I've just added a commit in your pull request to replace your
image with a smaller one. I've started from
autotest/gdrivers/data/jpeg/flir/FLIR.jpg<br>
and then hacked record 2 of type 32 (FLIR_REC_CAMERA_INFO) with
data at offset 0xC7E + 1352 by replacing it by type 14
(FLIR_REC_EMBEDDEDIMAGE), and then I copied & pasted the
content of a 2x1 JPEG image at offset 0xC7E + 1352 + 32. This
resulting image is of course non sensical, but enough for our
purposes.</p>
<p>Even</p>
<div class="moz-cite-prefix">Le 02/02/2026 à 18:39, Javier Jimenez
Shaw a écrit :<br>
</div>
<blockquote type="cite"
cite="mid:CADRrdKtOOGTNc3Utio7rPnYbv1O-R5Y2Ee5kovn87FE2ABUJLw@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">
<div>Hi Even</div>
<div><br>
</div>
<div>I was not able to achieve that, sorry. So finally I made
the PR with an original image.</div>
<div>If anybody has one image that works I can still replace
mine.</div>
<div><br>
</div>
<div>Thanks</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sat, 31 Jan 2026 at 03:20,
Even Rouault <<a href="mailto:even.rouault@spatialys.com"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">even.rouault@spatialys.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote"
style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<p>Javier,</p>
<p>What about the hard core GDAL contributor way of starting
with a small JPEG image and then adding the needed bytes
with your favorite hexadecimal editor :-) ?</p>
<p>Otherwise, still a bit of use of your hexadecimal editor,
but just to find out a couple offfset/lenghts, you may try
the trick of starting from an existing file, keeping the
begin in a part, the end in the other part, and omitting
most of the embedded image using a /vsisparse/ .XML file
and replacing it with a <ConstantRegion> at zero.
Like
<a
href="https://github.com/OSGeo/gdal/blob/master/autotest/gdrivers/data/grib/rotated_pole.grb2.xml"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://github.com/OSGeo/gdal/blob/master/autotest/gdrivers/data/grib/rotated_pole.grb2.xml</a>
and then you use "/vsisparse/your.xml" as a valid JPEG
dataset name.</p>
<p>Or variation of the above, perhaps a bit less convoluted,
start with your initial image, set to the zero byte
unneeded ranges, and zip it.</p>
<p>Even</p>
<div>Le 30/01/2026 à 10:43, Javier Jimenez Shaw via gdal-dev
a écrit :<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div>Hi</div>
<div><br>
</div>
<div>TL;DR: I need a "small" FLIR image file for a unit
test in GDAL. Do you have one?</div>
<div><br>
</div>
<div>I am working on GDAL's thermal jpeg code, to read
an embedded RGB image that some FLIR cameras are
including inside the JPEG, in addition to the thermal
information/image.</div>
<div><br>
</div>
<div>I want to add a unit test with a real image, but
unfortunately I only have "big" images, around 4 or 5
MB.</div>
<div><br>
</div>
<div>It would be great if anybody has a smaller image
that can be included in the GDAL tests code (with the
copyright/license permissions that it has).</div>
<div>The model "FLIR T640" I think produces images of
about 1.5 MB only. But it can be other models as well.</div>
<div><br>
</div>
<div>To check if it has the Embedded Image, just run
this:</div>
<div><br>
</div>
<div><span style="font-family:monospace">exiftool
-EmbeddedImage filename.jpg</span></div>
<div><br>
</div>
<div>If you see any output, please contact me.</div>
<div><br>
</div>
<div>Thank you!</div>
</div>
<br>
<fieldset></fieldset>
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<pre cols="72">--
<a href="http://www.spatialys.com" target="_blank"
moz-do-not-send="true" class="moz-txt-link-freetext">http://www.spatialys.com</a>
My software is free, but my time generally not.</pre>
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<pre class="moz-signature" cols="72">--
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My software is free, but my time generally not.</pre>
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