>From my experience this message comes from Libtiff and
simply means
that it has encountered a pseudo (or private) tag that it
doesn't
know how to interpret, so it will discard it. It won't
effect the
final file but the information within that tag will be lost.
I have
no idea why the compress option would suppress the error,
perhaps
they are re-directing the STDERR during the compression
sequence.
HTH,
Dp.
On 12 Apr 2007 at 10:03, Michael Ashton wrote:
> With ImageMagick 6.3.3.0 Q8 (dll) on Windows XP Pro
SP2
> With ImageMagick 6.3.2 compiled from source on Mac OS
10.4.9
> The following command (pseudo):
>
> convert MyImage.jpg MyImage.tif
>
> returns the following errors:
>
> Unknown pseudo-tag 65537. `TIFFSetField'.
> Unknown pseudo-tag 65538. `TIFFSetField'.
>
> The image appears to convert OK and is readable.
>
> By adding a (any) -compress option e.g.,
>
> convert MyImage.jpg -compress None MyImage.tif
>
> No error is returned.
>
> No other options seem to have an effect.
>
> ImageMagick 6.2.8 does not return this error under the
same conditions.
>
> Tried with multiple images and multiple input formats.
>
> Is -compress now a mandatory option for TIFF on
Windows?
>
> Am I missing something else?
>
> Michael Ashton
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> Magick-users imagemagick.org
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-users
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