Why can not I modify or delete Time Stamp?

[VladChav]

Why can´t modifier or delete Time Stamp?
I used the commands:

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exiftool -TimeStamp=

or

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exiftool "-TimeStamp<FileModifyDate"

These are the results:
0 image files updated
1 image files unchanged

[StarGeek]

What kind of file?    What are the results of exiftool -timestamp -g1 -a -s file ?

[VladChav]

They are .jpg files

The results of

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exiftool -timestamp -g1 -a -s are:

---- Samsung ----
TimeStamp                       : 2016:11:02 15:35:09-05:00

Thank you very much for your attention StarGeek

[StarGeek]

Unfortunately, it appears that the Samsung:Timestamp tag is not writable by exiftool.  If you look under the Samsung tags, you'll see that Timestamp has an N under the writable column.

[Phil Harvey]

You can delete the Samsung trailer containing the TimeStamp with this command:

exiftool -trailer:all= FILE

As well as the TimeStamp, this will delete the MPF trailer containing the PreviewImage.  But these previews are mainly used by the cameras, and are of limited use afterwards.

- Phil

[VladChav]

Wow! It's great, it works! Thank you very much Phil 

[101db]

Hi sorry to jump on your post but I'm having a similar problem, I'm trying to change a raw file. I type in the code for changing the date but how do I set it? I've pressed enter but no change..
Thanks

[Phil Harvey]

What was the exact command you used?  What messages did ExifTool give?  What was your ExifTool version?  What model of camera is the raw file?

- Phil

[101db]

I used the command I found on the website: '-DateTimeOriginal+=5:10:2 10:48:0' though I only want my date moved forward 5 months so put '0:5:0 0:0:0' in that part. I downloaded today the windows version 10.33. I used a Canon 6D, file CR2

[Phil Harvey]

OK.  On Windows you need to use double quotes instead of single quotes.

- Phil

[101db]

so the exact command as above but with " (a double) or '' (two singles)? Do I press enter afterwards and it just changes or do I need to do something to set it? Thank you

[Phil Harvey]

The command will look something like this:

exiftool "-datetimeoriginal+=0:5:0 0:0:0" FILE

Where you can drag and drop the file onto the cmd window instead of typing the file name for FILE.

Then press RETURN

- Phil

[101db]

I've done everything as instructed but it still isn't working for me. Thanks for your help, looks like I will have to give up!

[Hayo Baan]

Please show us the exact command you used, I'm sure there is an error in your input somewhere, no reason to give up

[101db]

I don't know how to show you, but I can tell you.. I dragged my photo I want to change over the exiftool application to open with exiftool then typed in

exiftool "-datetimeoriginal+=0:5:0 0:0:0"

I then dragged the picture file into the exiftool text bit where I was typing and the file name came up then pressed enter this didn't work, so I also tried typing FILE on the end of what I typed as Phil said but still didn't work. maybe I am doing something wrong?