How to update EXIF tags of a picture file in Ruby?

Question

Title says everything.

Anarchist

Answer 1

I'm using MiniExiftool, a ruby interface to Perl's Exiftool.

• https://github.com/janfri/mini_exiftool
• http://www.sno.phy.queensu.ca/~phil/exiftool/

Usage:

exif = MiniExiftool.new(file_path)
exif.date_time_original = Time.now
exif["captionextract"] = "This is my new caption"
exif.save

There is also: https://github.com/janfri/multi_exiftool

Xavierxaviera

I've had success editing existing tags but is there a way to add new ones? – Superstratum

exif["whatever"] = "Foo" – Xavierxaviera

if you are looking for just a reader, there is github.com/exiftool-rb/exiftool.rb – Gasman

Answer 2

Have you tried exifr?

EXIF Reader is a module to read EXIF from JPEG and TIFF images.

Toaster

Yes I did. It can only read tags but there isn't any writing support. I'm now using a call to the "jhead" tool. – Anarchist

"exifr" stands for "exif reader" and you didn't answer the question. – Sculptress

Answer 3

Try ruby-libexif: http://raa.ruby-lang.org/project/ruby-libexif/

Usage: http://74.125.113.132/search?q=cache:yjOeG4UnD38J:tach.arege.net/trac/browser/debian/libexif-ruby/trunk/exif.rd.en%3Frev%3D51%26format%3Draw+ruby+set+exif+tag&cd=10&hl=en&ct=clnk&gl=us&client=firefox-a

Perilymph

Thanks, I had seen this projet but it seems to be dead, all links are broken so I'm unable to install it... – Anarchist

Oh, that sucks. I'll go ahead and be blasphemous then. Try this: tilloy.net/dev/pyexiv2 – Perilymph