For example, here’s how to list the 35mm equivalent focal length for all files in the current directory: $ exiftool -FocalLength35efl. Now it becomes easier to query for specific values in a whole collection of files. In order to see the actual tag names, use the -s option. The default output shows tag descriptions and their readably formatted values. This simplest exiftool invocation that dumps all EXIF data for the file. All of these examples work on a Unix shell environment like ZSH on MacOS or the various Linux shells. I’m writing this down because I often spend a lot of time reading through exiftool documentation to find out how to get something done, just to forget it within hours. exiftool is a command-line utility that provides very powerful EXIF reading, writing and searching capabilities.
Following is a collection of real exiftool commands that I’ve used, along with explanations of what each does.
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