Phil,
I am not an expert but suggestion 1 is just another problem of how to pass
arguments to an application and could be solved by quoting rules maybe
-tag1="$tag2" would do the value and -tag1="'$tag2'" the string. I do
not know if this works, but would not be anything unusual.
About string manipulation: exiftool gets a string as an argument anyway as in
exiftool "-example_date=$datetimeoriginal" a.jpg
(using the "new" syntax :-)). What's wrong with
exiftool "-example_date=substring($datetimeoriginal,1,10)" a.jpg
to assign the first 10 characters of the DateTimeOriginal flag to
example_date? And if that should use a different notation one could
exiftool "-example_date=replace(substring($datetimeoriginal,1,10),':','/'))" a.jpg
to get e.g. "2008/01/31" into example_date.
Just a thought, Mixx
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