Canon RAW files -- rotation value writable?

[Archive]

[Originally posted by hippiness on 2006-03-21 11:33:55-08]

Hello again.  I don't seem to be able to effect a rotation value change in a Canon RAW file.  I can do this in the Canon File Viewer, and I'm sure it's possible, but how?  I'm using `exiftool filename.crw "-Rotation=90"', with the response `0 image files updated\n1 image files unchanged'.  As with my time zone query, I don't know of any software that honours this value at browse time.  (My Windows browser -- Irfanview -- doesn't.)  However, I would like to be able to set this value, so that software outside of Canon World (and Windows World, for that matter) might have a way of correctly orientating the enclosed jpeg image.  Incidentally, I'm sure Irfanview would work if the rotation value within the enclosed jpeg image were set correctly.  But I don't even want to go there.  

[Archive]

[Originally posted by exiftool on 2006-03-21 12:28:26-08]

Hi again,

Good point.  I just ran some tests and writing the Rotation tag makes sense.  It wasn't previously writable because it exists within a structure containing other image parameters that should not be changed.  But my tests show no problems when processing images with Canon's DPP after modifying this tag (and DPP rotates the image properly according to the written value, provided you write 0, 90, 180 or 270).  So I have added the ability to write this tag, and ExifTool version 6.07 (to be released within a day or so) will have this feature.

Thanks for pointing this out.