File Renaming to Include Exposure Compensation

[ipodzrock]

I would like to rename my image files using the "creation date" and including the "exposure compensation" (the last part to more easily filter in Lightroom ... I'm currently doing the following:

• exiftool -P -a "-FileName<CreateDate" -d "%Y%m%d-%H%M%S%%.lc.%%le" *.[cC][rR]2
• exiftool '-FileName<%f ($EXIF:ExposureCompensation EV).cr2' *.cr2

The problem that I run into is if the "exposure compensation" is in thirds such as ... Exposure Compensation: -4/3 ...

That ends up creating a directory on MacOS due to the "/" and the file ends up called 3 EV).cr2

I could use a sed command and create a BASH variable to use during the file renaming, but I'm hoping there is a more elegant solution ... in fact, if there is a more elegant solution and a way to combine the two commands I'd be thrilled.

Thanks!

[StarGeek]

See Advanced formatting feature
   A default expression of tr(/\\?*:|"<>\0)()d is assumed if the expression is empty (ie. ${TAG;}). This removes the characters / \ ? * : | < > and null from the printed value.

So use ${ExposureCompensation;} to remove the slashes.

Also, you might consider using the -ext (extension) option (-ext cr2) to limit processing to CR2 files and a single dot . to indicate the current directory.  If you ever decide to recurse into subdirectories, the asterisk wildcard won't work.

[Alan Clifford]

Wouldn't using -n in the exiftool command do it?

[StarGeek]

The output from adding -n appears to be decimal (e.g. 1.5 instead of +3/2) which may not be what ipodzrock wants.

[ipodzrock]

The -n command does produce this ... 20171027-080604b (-1.333333333 EV).cr2 ... if it was -1.3 that would be okay ... I was thinking something like -4/3 being translated to -4_3?

... adding a semicolon produces nearly the same thing except it looks like 20171027-080604b (-1.333333333; EV).cr2

[StarGeek]

20171027-080604b (-1.333333333; EV).cr2

Double check your command.  The fact that the semicolon is showing up there means that something is wrong.

But my command would completely remove the slash, resulting in -43.  Use this instead to put an underscore.
exiftool '-FileName<%f (${EXIF:ExposureCompensation;tr(/)(_)} EV).cr2' *.cr2

[Alan Clifford]

exiftool '-FileName<%f (${EXIF:ExposureCompensation;tr(/)(_)} EV).cr2' *.cr2

Could tr(/)(÷) be used instead or would that character cause problems?

[ipodzrock]

Sorry for misunderstanding your command ... here is the modified result ... 20171027-080604b (-4_3 EV).cr2

[StarGeek]

Is that the result you wanted?  Or does it need more tweaking?

[StarGeek]

Could tr(/)(÷) be used instead or would that character cause problems?

It might cause problems on Windows due to the usual character set problems, but probably not on Mac.

[ipodzrock]

This is the result I was looking for ... thank you