Exiv2

I have the problem using the exiv library in an cpp environment. Writing gps locations results is a red coloured arw file.

Any update on this?

The MakerNote is missing 4 zero values after a writeMetadata call.

before:

Exif.Photo.MakerNote                         Undefined 37092  (Binary value suppressed)

after:

Exif.Photo.MakerNote                         Undefined 37088  (Binary value suppressed)

I have change UserComment only. And this is correctly changed.

exifData["Exif.Photo.UserComment"] = QString("test").toStdString();

If I compare the Binary Data the only difference is four 0 values at the end.

Hello Robin,
I've done an experiment. I change the metadata of a raw file once directly with exiv2 and once with Digikam.
The result was that the Digikam file got corrupted and the command line one didn't.
https://www.dropbox.com/s/twy49qw7ecnqpf7/Metadata%20Digikam.ARW?dl=0
https://www.dropbox.com/s/1dyz2d90glim04i/Metadata%20exiv2.ARW?dl=0
The exif output is the same in both. Terminal output below.
It's Digikam specific as far as I can tell. I'll forward my knowledge to the original issue.

(In the output the picture with _2 was edited by Digikam and the other one by exiv2)

[#]$ exiv2 DSC04326.ARW
File name : DSC04326.ARW
File size : 20676608 Bytes
MIME type : image/tiff
Image size : 5504 x 3656
Camera make : SONY
Camera model : SLT-A58
Image timestamp : 2017:09:18 04:44:44
Image number :
Exposure time : 1/20 s
Aperture : F11
Exposure bias : 0 EV
Flash : No, compulsory
Flash bias : 0 EV
Focal length : 40.0 mm (35 mm equivalent: 60.0 mm)
Subject distance:
ISO speed : 640
Exposure mode : Auto
Metering mode : Multi-segment
Macro mode :
Image quality : n/a
Exif Resolution : 5504 x 3656
White balance : Cloudy
Thumbnail : image/jpeg, 6128 Bytes
Copyright :
Exif comment :

[#]$ exiv2 DSC04326_2.ARW
File name : DSC04326_2.ARW
File size : 20554786 Bytes
MIME type : image/tiff
Image size : 5504 x 3656
Camera make : SONY
Camera model : SLT-A58
Image timestamp : 2017:09:18 04:44:44
Image number :
Exposure time : 1/20 s
Aperture : F11
Exposure bias : 0 EV
Flash : No, compulsory
Flash bias : 0 EV
Focal length : 40.0 mm (35 mm equivalent: 60.0 mm)
Subject distance:
ISO speed : 640
Exposure mode : Auto
Metering mode : Multi-segment
Macro mode :
Image quality : n/a
Exif Resolution : 5504 x 3656
White balance : Cloudy
Thumbnail : image/jpeg, 6128 Bytes
Copyright :
Exif comment : test

[#]$ exiv2 -M"set Exif.Photo.UserComment charset=Ascii exiv2 write" DSC04326.ARW
[#]$ exiv2 DSC04326.ARW
File name : DSC04326.ARW
File size : 20676608 Bytes
MIME type : image/tiff
Image size : 5504 x 3656
Camera make : SONY
Camera model : SLT-A58
Image timestamp : 2017:09:18 04:44:44
Image number :
Exposure time : 1/20 s
Aperture : F11
Exposure bias : 0 EV
Flash : No, compulsory
Flash bias : 0 EV
Focal length : 40.0 mm (35 mm equivalent: 60.0 mm)
Subject distance:
ISO speed : 640
Exposure mode : Auto
Metering mode : Multi-segment
Macro mode :
Image quality : n/a
Exif Resolution : 5504 x 3656
White balance : Cloudy
Thumbnail : image/jpeg, 6128 Bytes
Copyright :
Exif comment : exiv2 write

The SR2 IFD's are completely missing from the "Metadata exiv2.ARW" file you uploaded, so no wonder if the colours are messed up. Did you name the files incorrectly? I thought it was the one written by Digikam ("Metadata Digikam.ARW"?) that showed the problem.

Thanks for saying something about this, Phil The was reported months ago when I was on vacation and hasn't received attention. Thanks for dealing with this.