Example
Issue the command:
-GPSLatitude=24.0 -GPSLatitudeRef=S -GPSLongitude=31.76 <some file.mp4>
updates the file, however the file is assigned GPS location 24.0 north and 31.76 east. The north latitude is incorrect; it should be south. I have tried variants of the command as -gpslatitude= and using "South" instead of S. Command still does not work. I also tried an arbitrary location for places in the western hemisphere. Assigned latitude is always east, even if specifying W or "West". (In case, east is fine and expected as I did not specify E!).
Exiftool version: 12.71
System: Mac M1 Professional
OS Version: Sonoma 14.2.1.
There are no reference tags in a video file. When writing GPSLatitude, GPSLongitude, and GPSAltitude, you include the direction. This is because you are writing to XMP tags instead of the EXIF GPS tags. EXIF tags in a video are non-standard, so you can't create them in a video. So you would use:
exiftool -GPSLatitude=-24.0 -GPSLongitude=31.76 file.mp4
Example
C:\>exiftool -all= -P -overwrite_original -GPSLatitude=-24.0 -GPSLongitude=31.76 Y:\!temp\Test1.mp4
1 image files updated
C:\>exiftool -G1 -a -s -gps* Y:\!temp\Test1.mp4
[XMP-exif] GPSLatitude : 24 deg 0' 0.00" S
[XMP-exif] GPSLongitude : 31 deg 45' 36.00" E
[Composite] GPSLatitudeRef : South
[Composite] GPSLongitudeRef : East
[Composite] GPSPosition : 24 deg 0' 0.00" S, 31 deg 45' 36.00" E
Additionally, video files have their own GPS tag which includes all three coordinates. For that you would write
exiftool -GPSCoordinates="-24, 31.76, 10" file.mp4
An easier command which will write to the EXIF GPS tags as well as the XMP GPS tags as needed would be to write the Composite:GPSPosition tag. In this example you can see that it wrote the correct data to both an MP4 and a jpeg
C:\>exiftool -all= -P -overwrite_original -GPSPosition="-24.0, 31.76" Y:\!temp\Test1.mp4 y:\!temp\Test4.jpg
2 image files updated
C:\>exiftool -G1 -a -s -gps* Y:\!temp\Test1.mp4 y:\!temp\Test4.jpg
======== Y:/!temp/Test1.mp4
[XMP-exif] GPSLatitude : 24 deg 0' 0.00" S
[XMP-exif] GPSLongitude : 31 deg 45' 36.00" E
[Composite] GPSLatitudeRef : South
[Composite] GPSLongitudeRef : East
[Composite] GPSPosition : 24 deg 0' 0.00" S, 31 deg 45' 36.00" E
======== y:/!temp/Test4.jpg
[GPS] GPSVersionID : 2.3.0.0
[GPS] GPSLatitudeRef : South
[GPS] GPSLatitude : 24 deg 0' 0.00"
[GPS] GPSLongitudeRef : East
[GPS] GPSLongitude : 31 deg 45' 36.00"
[Composite] GPSLatitude : 24 deg 0' 0.00" S
[Composite] GPSLongitude : 31 deg 45' 36.00" E
[Composite] GPSPosition : 24 deg 0' 0.00" S, 31 deg 45' 36.00" E
2 image files read
The video GPSCoordinates still has to be written separately.
If this is years old Photos.app .xmp issue (or similar) you might fix that nonstandard .xmp with:
exiftool -P -overwrite_original -XMP-exif:All= -tagsFromFile @ -XMP-exif:All '-XMP-exif:GPSLongitude<${XMP-exif:GPSLongitude#}${XMP-exif:GPSLongitudeRef#}' '-XMP-exif:GPSLatitude<${XMP-exif:GPSLatitude#}${XMP-exif:GPSLatitudeRef#}' *.xmp
Then use this to copy .xmp to images:
exiftool -m -overwrite_original_in_place -ext jpg -ext heic '-IPTC:CodedCharacterSet=UTF8' -tagsFromFile %d%f.xmp '-AllDates<XMP-photoshop:DateCreated' '-ExifIFD:OffsetTime*<XMP-photoshop:DateCreated' '-XMP-photoshop:DateCreated<XMP-photoshop:DateCreated' '-EXIF:All<XMP-exif:All' '-GPS:GPSLatitudeRef<Composite:GPSLatitudeRef' '-GPS:GPSLongitudeRef<Composite:GPSLongitudeRef' '-XMP:All<XMP:All' '-IPTC:ObjectName<XMP-dc:Title' '-IPTC:Caption-Abstract<XMP-dc:Description' '-EXIF:ImageDescription<XMP-dc:Description' '-IPTC:Keywords<XMP-dc:Subject' '-FileCreateDate<XMP-photoshop:DateCreated' '-FileModifyDate<XMP-photoshop:DateCreated' .
...and this to copy .xmp to movies:
exiftool -m -overwrite_original_in_place -api QuickTimeUTC=1 -ext mp4 -ext m4v -ext mov -tagsFromFile %d%f.xmp -api QuickTimeUTC=1 '-AllDates<XMP-photoshop:DateCreated' '-Track*Date<XMP-photoshop:DateCreated' '-Media*Date<XMP-photoshop:DateCreated' '-Keys:CreationDate<XMP-photoshop:DateCreated' '-Keys:GPSCoordinates<$XMP:GPSLatitude#, $XMP:GPSLongitude#' '-Keys:Title<XMP-dc:Title' '-Keys:Description<XMP-dc:Description' '-Keys:Keywords<XMP-dc:Subject' '-FileCreateDate<XMP-photoshop:DateCreated' '-FileModifyDate<XMP-photoshop:DateCreated' .
https://exiftool.org/forum/index.php?topic=12634.msg68327#msg68327 (https://exiftool.org/forum/index.php?topic=12634.msg68327#msg68327)
- Matti