Set a "prefix" or "leading text" before an existing label.

[yevev35775]

I want to "prefix" the label that ExifTool writes out to a textfile.

This command is working;

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exiftool -s -s -w! txt -ImageWidth -ImageHeight -r -ext jpg "pix"

It gives (for example) this output into a text-file like "IMG_20211016_150135.txt";

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ImageWidth: 3840
ImageHeight: 2160

But I want to get this output (mention the prefix before the label);

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camera__ImageWidth: 3840
camera__ImageHeight: 2160



It is possible to prefix ALL labels with a string like "camera__"?



Reason : I am creating sidecards for about 10.000 photo's, and the meta-data is fetched and rendered by a .php script on a webserver.

The server fetches only ".yaml" files with keys that are prefixed by "camera__".

Of course I can replace the cards line by line using another script, but maybe it's build into ExitTool?

[StarGeek]

You can't change the tag names by default, but you can control the output using the -p (-printFormat) option.

If you're only listing a few tags, you could do this, assuming Windows CMD, swap double/single quotes to prevent bash interpretation of the dollar signs.
exiftool -p "camera__ImageWidth: $ImageWidth$/camera__ImageHeight: $ImageHeight" /path/to/files/

If you have a lot of tags, you would be better off using a format file, as described in the above link.

[yevev35775]

Thank you - this work perfectly.

I indeed want to control the output to a separate text-file, I don't to write to the image itself.

So when I have this image foo.jpg, I want to create a text-file called foo.txt with all the meta-data.

Using the following command, I can control the output (or key / value pairs, in .YAML language);

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exiftool -s -s -w! txt -p "camera__file : $FileName$/camera__date : $CreateDate$/camera__shutter : $ShutterSpeed$/camera__width : $ImageWidth$/camera__height : $ImageHeight" -r -ext jpg "pix"

The above code fetches every .jpg image inside a folder (and it's subfolders), write (and overwrites) a text-file with all the tags mentioned, prefixed by "camera__" and a new line for every entry.

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camera__file : IMG_20210913_151255.jpg
camera__date : 2021:09:13 15:12:55
camera__shutter : 1/1053
camera__width : 3840
camera__height : 2160


I do get some warning from the prompt, like;

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Warning: [minor] Unrecognized MakerNotes - pix/folder-B/IMG_20210913_104711.jpg

But it does work :-)

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Windows 10 / most recent version of ExifTool