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ExifTool => Newbies => Topic started by: xabierr on January 12, 2018, 01:50:52 AM

Title: geotagging - no writable tags
Post by: xabierr on January 12, 2018, 01:50:52 AM
Im running exiftools 10.74 in windows 10.

I've extracted frames (image.jpg) from a video (mov) which I want to geotag. I have a gpx file (6aout.gpx) created using inverse geotagging from a set of images (geoimage.jpg).

When trying to geotag using: exiftool -geotag=6out.gpx image.jpg I get Warning: No writable tags

Is that because image.jpg dont have GPSLatitude GPSLongitude tags? If so, how can I copy those tags? And which tag should I use for Geotime?

Example files are attached.

Thanks for your help,

Javier
Title: Re: geotagging - no writable tags
Post by: StarGeek on January 12, 2018, 02:54:59 AM
There is no timestamp in image.jpg.  Without a time stamp, there's no way for exiftool to figure out the position in the 6out.gpx track.
Title: Re: geotagging - no writable tags
Post by: xabierr on January 12, 2018, 04:19:12 AM
Can I create a timestamp from datemodified?
Title: Re: geotagging - no writable tags
Post by: Phil Harvey on January 12, 2018, 07:08:29 AM
If you want to use the file modification date/time, you can do this:

exiftool -geotag=6out.gpx "-geotime<filemodifydate" -P image.jpg

If this doesn't work, see the Troubleshooting section here (https://exiftool.org/geotag.html#Troubleshooting).  (Your question was point number 2 on this page.)

- Phil
Title: Re: geotagging - no writable tags
Post by: xabierr on January 14, 2018, 03:36:51 PM
Thanks for your replies.

I tried using filemodifydate but get:

Warning: Error opening GPS file 'D:\6out.gpx' in File:Geotag (ValueConvInv)
Warning: GPS track is empty in File:Geotime (ValueConvInv)
Nothing to do.


I created the log track as per the example:

exiftool -fileOrder FilemodifyDate -p gpx.fmt D:\images6a > D:\6aout.gpx

Do I need to fix the log track?

cheers,
Javier

Title: Re: geotagging - no writable tags
Post by: Phil Harvey on January 14, 2018, 04:40:17 PM
Hi Javier,

You wrote "6aout.gpx", but you are trying to read "6out.gpx", which doesn't exist.  Make sure you use the correct file name.

- Phil
Title: Re: geotagging - no writable tags
Post by: xabierr on January 14, 2018, 04:51:08 PM
Sorry yes about the typo but still getting an error:


Warning: Invalid date/time (use YYYY:mm:dd HH:MM:SS[.ss][+/-HH:MM|Z]) in File:Geotime (ValueConvInv)
    1 directories scanned
    0 image files updated
  532 image files unchanged
Title: Re: geotagging - no writable tags
Post by: Phil Harvey on January 14, 2018, 09:25:01 PM
What is the value of DateTimeOriginal for the image?

exiftool -datetimeoriginal image.jpg

Unless you have copied a different tag to GeoTime, then the format of DateTimeOriginal must be wrong.

- Phil
Title: Re: geotagging - no writable tags
Post by: xabierr on January 14, 2018, 09:48:23 PM
Image.jpg was extracted from a mov video. I thought I could set up the time using:

exiftool "-FileCreateDate-=00:00:02 7:38:00" D:\image.jpg

How can I create a valid time stamp?

cheers,

Javier
Title: Re: geotagging - no writable tags
Post by: Phil Harvey on January 15, 2018, 07:13:33 AM
See point number 2 in the troubleshooting section here (https://exiftool.org/geotag.html#Troubleshooting).

- Phil
Title: Re: geotagging - no writable tags
Post by: xabierr on January 15, 2018, 04:38:12 PM
I was using "-geotime=filemodifydate" instead of "-geotime<filemodifydate" !!

Thanks for your patience and time!

cheers,

Javier

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