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convert 6.9.5-0 Q16 - "unknown image property error"

Posted: 2016-07-11T16:54:27-07:00
by bill_raynor
I am trying to extract IPTC and EXIF data from some scanned images. When I enter the command

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convert test.tif  -format "%[IPTC:2:05]" info:
or

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 convert test.tif  -format "%[IPTC:2:120]" info:
I get an error like

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convert: unknown image property "%[IPTC:2:05]" @ warning/property.c/InterpretImageProperties/3780.
What am I doing wrong? I get the same error using both MacPorts and HomeBrew/

Thx

OS X 10.11.5 using the "current" MacPorts installation (installed today).

Re: convert 6.9.5-0 Q16 - "unknown image property error"

Posted: 2016-07-11T17:27:37-07:00
by fmw42
Are you sure your camera has them stored in the picture?

What to you get from

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identify -verbose test.tif
If those specific meta data are not there or there is no IPTC profile listed, then I do not think the string format will find them?

(I am not a professional photographer and cannot find any of my images that have IPTC data, only EXIF in the verbose information. So I have never actually tried to access any IPTC data)

What do you get from

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convert -version
in terms of your delegates, though I am not sure whether some delegate is actually needed or not?

Can you post your image to some free hosting such as dropbox.com and put the URL here?

I am on OSX SnowLeopard and have used MacPorts to load my delegates, but install IM from source.

Re: convert 6.9.5-0 Q16 - "unknown image property error"

Posted: 2016-07-11T19:43:05-07:00
by bill_raynor
Thanks. My error. The program I use to edit the EXIF data (EXifChanger) apparently doesn't write the changes immediately, so the test.tif file didn't have a Caption. Hence the error. Thank you both for your help.

Bill