First of all, thanks very much for creating ExifTool and your continuous support!
When trying to write Tags from the CanonGroup, I run into a problem for many tags of this group. Without any specific error message, I get the following feedback:
exiftool -Canon:FocalLength="6.1 mm" f:\TestMovies\CameraTest\CanonG12\MVI_4929c.MOV
0 image files updated
1 image files unchanged
Nothing is being written. If I skip the group and just use -FocalLength="6.1 mm", the tag is written but the XMP-exif group.
Is my suspicion correct, that the tags in the Canon group cannot be written? If so, maybe the
Canon Tags section should be adjusted. At least MaxFocalLength and MinFocalLength are listed as writeable int16u.
Thanks very much for looking into this and best regards
Pesche
P.S. I was using a Canon Powershot G12, converted the movie using FFMPEG and tried to apply the tags from the original to the converted movie (or just set a tag in the converted movie).