Shift Date and Time during FileName

[danisaacson]

Phil, first off great work with exiftool; VERY useful.

I'm trying to use exiftool to rename a few thousand MTS files from an AVCHD camera based on the DateTimeOriginal.
Works fine if I don't need to timeshift...
$ exiftool '-FileName<DateTimeOriginal' -d  %Y-%m-%d-%H%M%S%%c.%%e -ext MTS *

but if I need to adjust the Date or Time during the rename process:
$ exiftool '-FileName<DateTimeOriginal+=5:0:0' -d  %Y-%m-%d-%H%M%S%%c.%%e -ext MTS *
gives me an error "Warning: No writable tags found" which I understand because MTS files are not writable by exiftool but I don't need to change the tag in the file, necessarily. I just want to able to adjust the date and time (i.e. shift timezones) as exiftool renames the files.  Does that make sense?

Any chance of making MTS files writeable?

[Phil Harvey]

The error is because there is no tag called "DateTimeOriginal+=5:0:0" in the file, so no tags are being written.

The best way to do what you want is to create a user-defined tag which shifts the DateTimeOriginal by 5 hours, then write FileName with this tag instead of DateTimeOriginal.

See this thread for an example config file that does this (but in this case, the shift was 2 months).

- Phil