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

Code Select Expand

./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.

Code Select Expand

./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.

Code Select Expand

./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!