[Originally posted by herb on 2009-11-10 18:54:08-08]
Hello,
I have a picture which contains only EXIF-metadata.
I backuped this metadata with command: exiftool -TagsFromFile pic1.jpg -all pic1.mie
The created MIE-file had a size of 68KB and contained
- the EXIF-metadata from file pic1.jpg (of course) and
- some additional metadata-groups like MIE-Preview, MIE-Thumbnail etc.
- and it contained XMP metadata: xmp-x, xmp-aux, xmp-exif and xmp-tiff.
I repeated this test using the command: exiftool -TagsFromFile pic1.jpg -all:all pic1.mie
Here the created MIE-file had only 9 KB and it contained only the EXIF metadata.
Now my questions:
(1)why do we have the described difference using tags: -all and -all:all ?
I had expected an identical result MIE-file.
(2) why does the "-all" MIE-file also contain XMP-metadata.
I could imagine that some MIE-specific tag-groups are created.
But I did not expect XMP metadata.
I hope that someone can answer/comment my questions.
Thanks in advance
[Originally posted by exiftool on 2009-11-10 21:01:11-08]Hi Herb,
This is the relevant section of the
-tagsFromFiledocumentation:
By default, this option will commute information between same-
named tags in different groups and write each tag to the preferred
group. This allows information to be automatically translated
when copying between images of different formats. However, if a
group name is specified for a tag then the information is written
to the original group (unless redirected to another group, see
below). This works even if "All" is used as a group name, so
"-All:All" is used to specify that all information be copied to
the same group in the destination file.
So specifying a group name prevents exiftool from moving the
tag to its preferred group, thus keeping it in the original location.
When this is done while copying EXIF to a MIE file, this prevents
the equivalent XMP and MIE tags from being generated.
I hope this makes sense. Basically it's an easy (but sneaky) way
to give you control over where the information is written.
- Phil
[Originally posted by herb on 2009-11-11 18:25:29-08]
Hello Phil,
Thanks for the quick and detailed answer and thanks for the very good job of exiftool.
Yes, your solution makes sense; I fully agree to it.