Hi Paul,

With exiftool you should almost never have to loop through files yourself. You can change the -o option to something like -o %d%f_new.jpg to add "_new.jpg" to all of the file names, then instead of "original_file.jpg", use a directory name. Then all images in the directory will be rewritten. Or, a different way to do this is to use something like -o publish_dir/%f.jpg to write the new images with the original names to a different directory.

Your command doesn't work with CR2 images because you are effectively destroying all proprietary Canon information with -all=. Unfortunately some of this information is necessary for converting the image. In general, you have to be very careful about deleting information from RAW images. Also, you should never change the Make and Model tags in a RAW image because without this information the converters will not be able to properly parse the file.

- Phil