Transferring GPS location does not work

[GabrielZ]

I would like to transfer the GPSCoordinates and/or the GPSPosition from one movie file to another one (on my Mac).
So I execute this:

% exiftool-5.24 -tagsFromFile IMG_7441.MOV -GPSCoordinates IMG_7441.m4v
Warning: Sorry, gpscoordinates is not writable - IMG_7441.MOV
Warning: No writable tags set from IMG_7441.MOV
    0 image files updated
    1 image files unchanged
% /opt/local/bin/exiftool-5.24 -tagsFromFile IMG_7441.MOV -GPSPosition IMG_7441.m4v
Warning: Sorry, gpsposition is not writable - IMG_7441.MOV
Warning: No writable tags set from IMG_7441.MOV
    0 image files updated
    1 image files unchanged

Any ideas what I can do?
(I am using version 10.25 of exiftools.)

Any hints will be appreciated.

[Phil Harvey]

ExifTool does not have the ability to write the QuickTime GPSCoordinates (see the QuickTime tags documentation for a complete list indicating which tags are writable).  The best you could do is to write the XMP:GPSLatitude and XMP:GPSLongitude, which you can do like this:

exiftool -tagsfromfile SRCFILE -gpslatitude -gpslongitude DSTFILE

- Phil

[GabrielZ]

Thanks a million for your quick response!

Problem is, that it seems that those fields are not evaluated by Quicktime or the Photos app.

I have these fields in DSTFILE:

Code Select Expand

GPSLatitude                     : 38 deg 42' 57.24" N
GPSLongitude                    : 9 deg 8' 24.36" W

but neither Quicktime Player nor Photos app show any location info when I open DSTFILE with those apps.

[GabrielZ]

What about 'GPSCoordinates' ? Would there be any way to write that tag?
Maybe this is the one that Quicktime/Photos evaluate ...

[Phil Harvey]

Yes, likely it is the QuickTime:GPSCoordinates tag that QuickTime/Photos use.  ExifTool can not currently write this tag.

- Phil