FileTypeExtension not being applied to filename

[dRuEFFECT]

I was trying to update -AllDates on a bunch of files and got the dreaded "Error: Not a valid PNG (looks more like a JPEG)"

It doesn't tell me which files have errored, so I want to broadly update files. I found several different commands I can use to do so, but then they aren't working right. I provided a screenshot of the commands and results.


First I'm showing the target folder with a single png file, 14.png

Next I'm making sure I isolate files with png extension, and print the FileType and FileTypeExtension, shows PNG and png as expected

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./exiftool -ext png -filetype -filetypeextension /mnt/user/metadata/Andrew/time\ capsule/six\ flags\ pix/
I test an if statement for checking if the file is a JPEG, that fails as expected.

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./exiftool -ext png -if "$filetype eq 'JPEG'" "-filename=%f.jpg" /mnt/user/metadata/Andrew/time\ capsule/six\ flags\ pix/
Then I test it again checking for PNG, but this also fails. Weird.

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./exiftool -ext png -if "$filetype eq 'PNG'" "-filename=%f.png" /mnt/user/metadata/Andrew/time\ capsule/six\ flags\ pix/
So I try out another approach I found that doesn't use if statement, just applying the FileTypeExtension tag it has and it should just rename it to the same filename it already is... except it doesn't.

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./exiftool -ext png "-filename=%f.$fileTypeExtension" /mnt/user/metadata/Andrew/time\ capsule/six\ flags\ pix/
I list the files in the folder again and see it renamed it to "14." without the extension.

So I have to manually mv the file to put the extension back on.

I don't think I'm doing anything wrong here. What gives?

[StarGeek]

Swap the quotes. You're on Linux, so a dollar sign surrounded by double quotes is a shell variable, not an exiftool tag.

As an example, you would use this
-if '$filetype eq "PNG" '

[dRuEFFECT]

thank you very much!

[Phil Harvey]

It doesn't tell me which files have errored

You can use the -efile option to save the names of all files with errors.

- Phil