can exiftool set the ppi-resolution in a jpg

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[Originally posted by exifnoobie on 2009-01-15 23:26:52-08]

I use the save for web within the Adobe suite to create small jpgs, but it strips out the resolution settings. Can exiftool set the PPI for a file? any tips on where to look for more info? thx

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[Originally posted by exiftool on 2009-01-16 11:37:26-08]

Yes.  There are 3 places to do this:

1) If the file has EXIF, write EXIF:XResolution, EXIF:YResolution and
EXIF:ResolutionUnit.

2) Otherwise, write JFIF:XResolution, JFIF:YResolution and
JFIF:ResolutionUnit.

3) As well, if the image has Photoshop information, you
should also update Photoshop:XResolution and Photoshop:YResolution
(these are in inches -- no resolutionUnit to set here).

- Phil

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[Originally posted by exifnoobie on 2009-01-16 22:40:51-08]

thanks, I'll give it a try