Re: Need to create an exif field in a file
Robert Peirce
Jolly Roger <jolly...@pobox.com> wrote:
> Not to be rude, but I see you are multiposting this question, and I wish
> you would learn to do the more considerate thing, and crosspost it
> instead! See below for details, or do a Google search for "multiposting
> vs crossposting".
Thanks, but that's not exactly what I was doing. Posting to other
groups led me to comp.sys.mac.apps as the obvious place to find an app.
I started in alt.photography, since that seemed like the logical place
to start. However, I was getting too much stuff related to PCs.
At the time I thought exiftool was a Mac tool so I moved to
comp.sys.mac.misc. When I found out it ran on many platforms, but
didn't seem to be able to do what I wanted to do, I came to
comp.sys.mac.apps to see if I could find an app that would.
I now find Composite groups are derived from data in other groups, and
it appears if there is no field in the file there is no way to create
one after the fact. At least nobody has been able to point me to a way.
That being the case, I seem to have reached a dead-end.
BTW, I have cross-posted this to alt.photography and to
comp.sys.mac.misc to close off the discussion on netnews. I have
discovered an exiftool forum and I am hoping, if there is a solution, I
will find it there.
Jolly Roger
Robert Peirce <b...@peirce-family.com> wrote:
> In article <jollyroger-A9009...@news.individual.net>,
> Jolly Roger <jolly...@pobox.com> wrote:
>
> > Not to be rude, but I see you are multiposting this question, and I wish
> > you would learn to do the more considerate thing, and crosspost it
> > instead! See below for details, or do a Google search for "multiposting
> > vs crossposting".
>
> Thanks, but that's not exactly what I was doing. Posting to other
> groups led me to comp.sys.mac.apps as the obvious place to find an app.
> I started in alt.photography, since that seemed like the logical place
> to start. However, I was getting too much stuff related to PCs.
>
> At the time I thought exiftool was a Mac tool so I moved to
> comp.sys.mac.misc. When I found out it ran on many platforms, but
> didn't seem to be able to do what I wanted to do, I came to
> comp.sys.mac.apps to see if I could find an app that would.
That makes sense. It wasn't readily apparent to me. Thanks for
explaining.
--
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JR
Robert Peirce
is a file that can be saved as .ExifTool_config in your home directory
that will automatically create Composite tags. You can find it at
http://www.sno.phy.queensu.ca/~phil/exiftool/
My goal was to have a Capture Date for scanned images that I could sort
in iView Media Pro. For whatever reason, iView seems to look at the
Composite rather than the EXIF. Nevertheless, by setting
DateTimeOriginal, I was able to get this to work.
I am a complete novice at exiftool and I very much appreciate everybody
who offered help.
AES
>
> I now find Composite groups are derived from data in other groups, and
> it appears if there is no field in the file there is no way to create
> one after the fact. At least nobody has been able to point me to a way.
> That being the case, I seem to have reached a dead-end.
>
I was going to mention iView MediaPro as a Mac app always to be
recommended for photo organizing and managing, but on scanning the
manual it appears that while it can modify the exif data in one or two
exif fields (in some files anyway, and if the data is already present),
there's no mention I could see of adding exif fields (except, maybe, by
doing an XML export and then hand-editing the resulting XML file).
Fred McKenzie
> it appears if there is no field in the file there is no way to create
> one after the fact.
Robert-
Where in the file is EXIF data stored? If at the beginning or end, it
might be possible to strip the EXIF data from a file that has a complete
set, concatenate it to a scanned file, and then edit it to suit.
Such a combined file might appear "defective", but if you can open it,
you might be able to re-save it as a legitimate file. Or the EXIF
editing program might fix it for you!
Fred
Chris Ridd
EXIF data is all stored near the start of the file in an APP1 segment.
The Wikipedia description of the JFIF spec show how a segment appears
in a file - see
<http://en.wikipedia.org/wiki/JPEG_File_Interchange_Format>.
--
Chris