[gdal-dev] Fwd: [Tiff] Caution if using mozjpeg and IJG libjpeg 9d

[Even Rouault]

Relevant also for this group. Internal libtiff has just been patched 
with the changes mentioned below.

I'd recommend sticking with libjpeg-turbo (preferred option) or IJG 
libjpeg 6b, 7.x or 8.x

Even


-------- Message transféré --------
Sujet : 	[Tiff] Caution if using mozjpeg and IJG libjpeg 9d
Date : 	Tue, 15 Jun 2021 17:33:44 +0200
De : 	Even Rouault <even.rouault at spatialys.com>
Pour : 	tiff at lists.osgeo.org <tiff at lists.osgeo.org>



Hi,

A word of caution for those using mozjpeg or IJG libjpeg 9d for creating 
JPEG-in-TIFF files. It has been found that current libtiff releases can 
generate non-conformant (mozjpeg case) or broken (libjpeg 9d case) 
files. See https://gitlab.com/libtiff/libtiff/-/issues/266 for more details.

https://gitlab.com/libtiff/libtiff/-/merge_requests/254 and 
https://gitlab.com/libtiff/libtiff/-/merge_requests/255 have been merged 
with workarounds to make libtiff work with those JPEG libraries.

Even

-- 
http://www.spatialys.com
My software is free, but my time generally not.

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