How to set Image timestamp?
Added by Damien Cottet about 6 years ago
Hello,
I successfully use exiv2 to extract the timestamp of my photos in order to class them in folders named with the date.
Recently one gave me some photos without EXIF data. I try to set the timestamp field without success.
I tried the following command: exiv2 -M"set Exif.Image.DateTime 2015:10:24 20:00:00" p1200632.jpg
The result is that an EXIF structure has been created in the file because the command exiv2 p1200632.jpg doesn't respond any more that there is no EXIF metadata. But the field "Image timestamp" is still empty.
I of course looked in the help documentation but wasn't able to find a clear solution.
Can you please help me?
Regards
Replies (7)
RE: How to set Image timestamp? - Added by Robin Mills about 6 years ago
Damien
Can you send my your image please? I've just successfully run your command on an image on my machine:
582 rmills@rmillsmbp:~/temp $ exiv2 -pa --grep Date S.jpg Exif.Image.DateTime Ascii 20 2015:07:16 20:25:28 Exif.Photo.DateTimeOriginal Ascii 20 2015:07:16 15:38:54 Exif.Photo.DateTimeDigitized Ascii 20 2015:07:16 15:38:54 Exif.NikonWt.DateDisplayFormat Byte 1 Y/M/D Exif.GPSInfo.GPSDateStamp Ascii 11 2015:07:16 Xmp.xmp.ModifyDate XmpText 25 2015-07-16T20:25:28+01:00 583 rmills@rmillsmbp:~/temp $ exiv2 -M"set Exif.Image.DateTime 2015:10:24 20:00:00" S.jpg 584 rmills@rmillsmbp:~/temp $ exiv2 -pa --grep Date S.jpg Exif.Image.DateTime Ascii 20 2015:10:24 20:00:00 Exif.Photo.DateTimeOriginal Ascii 20 2015:07:16 15:38:54 Exif.Photo.DateTimeDigitized Ascii 20 2015:07:16 15:38:54 Exif.NikonWt.DateDisplayFormat Byte 1 Y/M/D Exif.GPSInfo.GPSDateStamp Ascii 11 2015:07:16 Xmp.xmp.ModifyDate XmpText 25 2015-07-16T20:25:28+01:00 585 rmills@rmillsmbp:~/temp $And I've run it on an image on my website. http://clanmills.com/2015/Patio/Images/DSC_7669.jpg I strip the metadata from images on my website.
588 rmills@rmillsmbp:~/clanmills/2015/Patio/Images $ exiv2 -pa --grep Date DSC_7669.jpg 589 rmills@rmillsmbp:~/clanmills/2015/Patio/Images $ exiv2 -M"set Exif.Image.DateTime 2015:10:24 20:00:00" DSC_7669.jpg 590 rmills@rmillsmbp:~/clanmills/2015/Patio/Images $ exiv2 -pa --grep Date DSC_7669.jpg Exif.Image.DateTime Ascii 20 2015:10:24 20:00:00 591 rmills@rmillsmbp:~/clanmills/2015/Patio/Images $So I'm think your imagefile may be suspect.
RE: How to set Image timestamp? - Added by Robin Mills about 6 years ago
Oh, I've had another thought. When you say:
But the field "Image timestamp" is still empty.
Are you referring to something you can see in a GUI such as Windows Explorer or Mac Finder. You may have to set another field. Usually there are 3 timestamps:
Exif.Image.DateTime Ascii 20 2015:07:16 20:25:28 Exif.Photo.DateTimeOriginal Ascii 20 2015:07:16 15:38:54 Exif.Photo.DateTimeDigitized Ascii 20 2015:07:16 15:38:54
RE: How to set Image timestamp? - Added by Robin Mills about 6 years ago
Ah, I've got it:
593 rmills@rmillsmbp:~/temp $ exiv2 ~/temp/S.jpg File name : /Users/rmills/temp/S.jpg File size : 6757894 Bytes MIME type : image/jpeg Image size : 6000 x 4000 Camera make : NIKON CORPORATION Camera model : NIKON D5300 Image timestamp : 2015:07:16 15:38:54 Image number : Exposure time : 1/400 s Aperture : F10 Exposure bias : 0 EV Flash : No, compulsory Flash bias : Focal length : 44.0 mm (35 mm equivalent: 66.0 mm) Subject distance: ISO speed : 200 Exposure mode : Not defined Metering mode : Multi-segment Macro mode : Image quality : NORMAL Exif Resolution : 6000 x 4000 White balance : AUTO Thumbnail : image/jpeg, 10837 Bytes Copyright : Exif comment : 594 rmills@rmillsmbp:~/temp $The exiv2 default report called summary displays "Exif.Photo.DateTimeOriginal". So set that, and you'll be happy!
597 rmills@rmillsmbp:~/temp $ exiv2 -M"set Exif.Photo.DateTimeOriginal 2015:10:24 20:00:00" S.jpg 598 rmills@rmillsmbp:~/temp $ exiv2 ~/temp/S.jpg File name : /Users/rmills/temp/S.jpg File size : 6757894 Bytes MIME type : image/jpeg Image size : 6000 x 4000 Camera make : NIKON CORPORATION Camera model : NIKON D5300 Image timestamp : 2015:10:24 20:00:00 Image number : Exposure time : 1/400 s Aperture : F10 Exposure bias : 0 EV Flash : No, compulsory Flash bias : Focal length : 44.0 mm (35 mm equivalent: 66.0 mm) Subject distance: ISO speed : 200 Exposure mode : Not defined Metering mode : Multi-segment Macro mode : Image quality : NORMAL Exif Resolution : 6000 x 4000 White balance : AUTO Thumbnail : image/jpeg, 10837 Bytes Copyright : Exif comment : 599 rmills@rmillsmbp:~/temp $
RE: How to set Image timestamp? - Added by Damien Cottet about 6 years ago
Hello Robin,
Thanks for your quick answer!
I checked your reply and it is actually what I also tried. But I realise that I misunderstood. I extract the EXIF metadata with the simple command exiv2 image.jpg which corresponds to exiv2 -ps image.jpg. I expected to see my timestamp in the "Image timestamp" field listed between others by that command, but the field is empty and it contains a date and time for photos that I get with EXIF data. That's why I said it doesn't run...
So now it is ok for my photos when I use your command and I will adapt my script to it.
But now why stays the "Image timestamp" field empty?
RE: How to set Image timestamp? - Added by Damien Cottet about 6 years ago
Exactly!! You replied quicker than I wrote my post!
I now successfully changed the famous "Image timestamp" field that I get with exiv2 image.jpg.
Thanks for all!
Kind Regards,
Damien
RE: How to set Image timestamp? - Added by Alan Pater about 6 years ago
On a related note, there are guidelines on which DateTime fields to use. DateTimeOriginal is when the photo was taken. DateTime is when it was further modified.
The Metadata Working Group has the details:
http://www.metadataworkinggroup.org/pdf/mwg_guidance.pdf#page=37RE: How to set Image timestamp? - Added by Damien Cottet about 6 years ago
Hi Alan,
Thanks for your hint. I find this document useful.
Regards
Damien