ExifTool Forum

ExifTool => Newbies => Topic started by: andersnordh on April 18, 2021, 09:38:33 AM

Title: How to remove som autogenerated tags from ExifTool
Post by: andersnordh on April 18, 2021, 09:38:33 AM
Hey guys I have problem with removing the tag thats called processing software (it shows jExifGui 1.81)
How do I remove it ?

I have used the gui and changed the data i wanted....
and i have also removed the 0x000b tag and changed the the xmptoolkit tag using the command:
exiftool IMG.jpg -xmptoolkit="XMP Core 5.4.0" -software=

How do I remove the "processing software" tag  ?

best regards.
Title: Re: How to remove som autogenerated tags from ExifTool
Post by: StarGeek on April 18, 2021, 10:49:18 AM
Try adding this to your command
-ProcessingSoftware=
Title: Re: How to remove som autogenerated tags from ExifTool
Post by: andersnordh on April 18, 2021, 12:18:05 PM
Quote from: StarGeek on April 18, 2021, 10:49:18 AM
Try adding this to your command
-ProcessingSoftware=

Yes i have tried that.
Is "Processingsoftware" the same as "Processing software" (with space between the words).

?
Title: Re: How to remove som autogenerated tags from ExifTool
Post by: StarGeek on April 18, 2021, 01:26:39 PM
Read FAQ #2 (https://exiftool.org/faq.html#Q2).  Run the command in FAQ #3 (https://exiftool.org/faq.html#Q3) to figure out the tag name that you need to remove if ProcessingSoftware isn't the correct one.

You probably need to run the command on the command line as jExifGui might still add the tag even if you try to remove it.
Title: Re: How to remove som autogenerated tags from ExifTool
Post by: andersnordh on April 18, 2021, 04:36:56 PM
Thanks.
worked much better without  the GUI.
only one "small thing" .

the changed exif looks like the original file  except one little thing... the order of the tags.

XMPToolkit
CreatorTool
DateCreated

is the order on the "original exif" (or what you can call it)

XMPToolkit
DateCreated
CreatorTool

is the order in the "changed exif"

How do I solve this.....

The command I have entered in order is:

exiftool.exe -ModifyDate=y:m:d:h:m:s -DateTimeOriginal=y:m:d:h:m:s -CreateDate=y:m:d:h:m:s -xmptoolkit=VALUE -SubSecCreateDate=y:m:d:h:m:s.ms -SubSecDateTimeOriginal=y:m:d:h:m:s.ms -ProcessingSoftware= <PATH TO FILE>


Title: Re: How to remove som autogenerated tags from ExifTool
Post by: StarGeek on April 18, 2021, 04:48:02 PM
Why do you feel you need to do this?

Basically, you can't. This is FAQ #13a (https://exiftool.org/faq.html#Q13).
    When ExifTool writes an image, the meta information may be restructured in such a way that it takes less space than in the original file, or so that some tags are stored at different offsets in the file.

You can use the -sort option (https://exiftool.org/exiftool_pod.html#sort---sort) to alphabetize it the output but the order will otherwise never be guaranteed.

edit: clarification
Title: Re: How to remove som autogenerated tags from ExifTool
Post by: Phil Harvey on April 18, 2021, 04:50:36 PM
ExifTool always writes XMP in alphabetical order.  The -sort option that StarGeek mentioned applies to reading metadata only.

- Phil
Title: Re: How to remove som autogenerated tags from ExifTool
Post by: andersnordh on April 19, 2021, 02:21:04 AM
Quote from: StarGeek on April 18, 2021, 04:48:02 PM
Why do you feel you need to do this?

Basically, you can't. This is FAQ #13a (https://exiftool.org/faq.html#Q13).
    When ExifTool writes an image, the meta information may be restructured in such a way that it takes less space than in the original file, or so that some tags are stored at different offsets in the file.

You can use the -sort option (https://exiftool.org/exiftool_pod.html#sort---sort) to alphabetize it the output but the order will otherwise never be guaranteed.

edit: clarification


If someone looked at the file maby they would think it would be changed (that the image have a structual exif order) and if the structual is changed then then it can indicate that the exifdata have been changed ?
Or am I overthinking  ?
Title: Re: How to remove som autogenerated tags from ExifTool
Post by: Alan Clifford on April 19, 2021, 06:51:15 AM
Quote from: andersnordh on April 19, 2021, 02:21:04 AM

If someone looked at the file maby they would think it would be changed (that the image have a structual exif order) and if the structual is changed then then it can indicate that the exifdata have been changed ?
Or am I overthinking  ?

The meta data has been changed.  You removed the processingsoftware tag.
Title: Re: How to remove som autogenerated tags from ExifTool
Post by: StarGeek on April 19, 2021, 11:03:36 AM
Quote from: andersnordh on April 19, 2021, 02:21:04 AM
If someone looked at the file maby they would think it would be changed (that the image have a structual exif order) and if the structual is changed then then it can indicate that the exifdata have been changed ?

They would have to have the original image to compare the order to.  And at that point they would already be able to know if something has changed.  It's certainly not something that would fool anyone who would be able to dig into the structure of the metadata itself anyway.