Title: Problem Setting FileModifyDate
Post by: Archive on May 12, 2010, 08:54:22 AM
Post by: Archive on May 12, 2010, 08:54:22 AM
[Originally posted by justin on 2008-07-13 05:50:08-07]
I'm having a problem setting the fileModifyDate on a dozen or so files. Please see the example output below and notice that the hour in the fileModifyDate is one hour in front of all the other settings. This behavoir is the same in reverse - if I use the fileModifyDate to set the createDate, it loses an hour.
I have tried looking for some kind of timezone offset but can not see one in the meta output?
As an aside, is it possible to set the file create date using EXIFTOOL?
I'm having a problem setting the fileModifyDate on a dozen or so files. Please see the example output below and notice that the hour in the fileModifyDate is one hour in front of all the other settings. This behavoir is the same in reverse - if I use the fileModifyDate to set the createDate, it loses an hour.
Code:
D:\Photos\Library\2006\03\26>exiftool -EXIF:alldates -filemodifydate -G1 2006-03
-26_D50_DSC_0549.JPG
[ExifIFD] Date/Time Original : 2006:03:26 10:31:13
[ExifIFD] Create Date : 2006:03:26 10:31:13
[IFD0] Modify Date : 2006:03:26 10:31:13
[File] File Modification Date/Time : 2006:03:26 11:31:13
D:\Photos\Library\2006\03\26>exiftool "-FileModifyDate<ExifIFD:CreateDate" 2006-
03-26_D50_DSC_0549.JPG
1 image files updated
D:\Photos\Library\2006\03\26>exiftool -EXIF:alldates -filemodifydate -G1 2006-03
-26_D50_DSC_0549.JPG
[ExifIFD] Date/Time Original : 2006:03:26 10:31:13
[ExifIFD] Create Date : 2006:03:26 10:31:13
[IFD0] Modify Date : 2006:03:26 10:31:13
[File] File Modification Date/Time : 2006:03:26 11:31:13
D:\Photos\Library\2006\03\26>
-26_D50_DSC_0549.JPG
[ExifIFD] Date/Time Original : 2006:03:26 10:31:13
[ExifIFD] Create Date : 2006:03:26 10:31:13
[IFD0] Modify Date : 2006:03:26 10:31:13
[File] File Modification Date/Time : 2006:03:26 11:31:13
D:\Photos\Library\2006\03\26>exiftool "-FileModifyDate<ExifIFD:CreateDate" 2006-
03-26_D50_DSC_0549.JPG
1 image files updated
D:\Photos\Library\2006\03\26>exiftool -EXIF:alldates -filemodifydate -G1 2006-03
-26_D50_DSC_0549.JPG
[ExifIFD] Date/Time Original : 2006:03:26 10:31:13
[ExifIFD] Create Date : 2006:03:26 10:31:13
[IFD0] Modify Date : 2006:03:26 10:31:13
[File] File Modification Date/Time : 2006:03:26 11:31:13
D:\Photos\Library\2006\03\26>
I have tried looking for some kind of timezone offset but can not see one in the meta output?
As an aside, is it possible to set the file create date using EXIFTOOL?
Title: Re: Problem Setting FileModifyDate
Post by: Archive on May 12, 2010, 08:54:22 AM
Post by: Archive on May 12, 2010, 08:54:22 AM
[Originally posted by justin on 2008-07-13 08:34:21-07]
Just some further info on this...I notice that the files in question were taken on the first day of daylight savings time in the UK in both 2006 and 2007 with my Nikon D50 camera. No other files taken with the same camera have this problem.
Just some further info on this...I notice that the files in question were taken on the first day of daylight savings time in the UK in both 2006 and 2007 with my Nikon D50 camera. No other files taken with the same camera have this problem.
Title: Re: Problem Setting FileModifyDate
Post by: Archive on May 12, 2010, 08:54:22 AM
Post by: Archive on May 12, 2010, 08:54:22 AM
[Originally posted by exiftool on 2008-07-13 11:38:43-07]
Interesting. It would appear that Windows and
Perl disagree about the date when daylight
savings time started. I assume you are using
the Windows exe version of exiftool? If so,
it uses Perl 5.8. Perhaps if I updated to a more
recent version of Perl it would fix this. I will
look into it. Until then, try shifting the
filemodifydate back by one hour on these
files with -filemodifydate-=1. There is no
platform-independent way to set
the create date in Perl, so exiftool
can not do this. - Phil
Interesting. It would appear that Windows and
Perl disagree about the date when daylight
savings time started. I assume you are using
the Windows exe version of exiftool? If so,
it uses Perl 5.8. Perhaps if I updated to a more
recent version of Perl it would fix this. I will
look into it. Until then, try shifting the
filemodifydate back by one hour on these
files with -filemodifydate-=1. There is no
platform-independent way to set
the create date in Perl, so exiftool
can not do this. - Phil
Title: Re: Problem Setting FileModifyDate
Post by: Archive on May 12, 2010, 08:54:22 AM
Post by: Archive on May 12, 2010, 08:54:22 AM
[Originally posted by justin on 2008-07-13 15:25:04-07]
Yes I am using the windows .exe version of Exiftool. Could it be that my version of Windows is set to UK daylight savings settings and maybe Pearl is using US?
I have tried to bring back the filemodifydate by one hour as suggested by no joy. Perhaps I'm doing something wrong?
Yes I am using the windows .exe version of Exiftool. Could it be that my version of Windows is set to UK daylight savings settings and maybe Pearl is using US?
I have tried to bring back the filemodifydate by one hour as suggested by no joy. Perhaps I'm doing something wrong?
Code:
D:\Photos>exiftool -alldates -fileModifyDate -s -G1 D:\Photos\Library\2006\03\26
\*
======== D:\Photos\Library\2006\03\26\2006-03-26_D50_DSC_0549.JPG
[ExifIFD] DateTimeOriginal : 2006:03:26 10:31:13
[ExifIFD] CreateDate : 2006:03:26 10:31:13
[IFD0] ModifyDate : 2006:03:26 10:31:13
[File] FileModifyDate : 2006:03:26 11:31:13
14 image files read
D:\Photos>exiftool "-fileModifyDate-=1" D:\Photos\Library\2006\03\26\* -r -ov
erwrite_original
0 image files updated
14 image files unchanged
D:\Photos>exiftool -alldates -fileModifyDate -s -G1 D:\Photos\Library\2006\03\26
\*
======== D:\Photos\Library\2006\03\26\2006-03-26_D50_DSC_0549.JPG
[ExifIFD] DateTimeOriginal : 2006:03:26 10:31:13
[ExifIFD] CreateDate : 2006:03:26 10:31:13
[IFD0] ModifyDate : 2006:03:26 10:31:13
[File] FileModifyDate : 2006:03:26 11:31:13
14 image files read
Justin..\*
======== D:\Photos\Library\2006\03\26\2006-03-26_D50_DSC_0549.JPG
[ExifIFD] DateTimeOriginal : 2006:03:26 10:31:13
[ExifIFD] CreateDate : 2006:03:26 10:31:13
[IFD0] ModifyDate : 2006:03:26 10:31:13
[File] FileModifyDate : 2006:03:26 11:31:13
14 image files read
D:\Photos>exiftool "-fileModifyDate-=1" D:\Photos\Library\2006\03\26\* -r -ov
erwrite_original
0 image files updated
14 image files unchanged
D:\Photos>exiftool -alldates -fileModifyDate -s -G1 D:\Photos\Library\2006\03\26
\*
======== D:\Photos\Library\2006\03\26\2006-03-26_D50_DSC_0549.JPG
[ExifIFD] DateTimeOriginal : 2006:03:26 10:31:13
[ExifIFD] CreateDate : 2006:03:26 10:31:13
[IFD0] ModifyDate : 2006:03:26 10:31:13
[File] FileModifyDate : 2006:03:26 11:31:13
14 image files read
Title: Re: Problem Setting FileModifyDate
Post by: Archive on May 12, 2010, 08:54:22 AM
Post by: Archive on May 12, 2010, 08:54:22 AM
[Originally posted by exiftool on 2008-07-13 16:44:31-07]
Now I have a couple more mysteries to deal with.
First, I hope you deleted the output from the other 13
files in the first and last commands because otherwise
I don't understand where it went.
Second, your 2nd command should work fine to change
the filemodifydate. I even broke out the Windows box
here and tested this exact command and it works fine
for me. Try using the -v3 option to see if that sheds
any more light on the subject (you should get an indication
that exiftool is shifting FileModifyDate, and a list of the
files that it reads).
Also, the -overwrite_original option is not necessary when
just writing filemodifydate since this is a "pseudo" tag which
doesn't require rewriting of the file.
- Phil
Now I have a couple more mysteries to deal with.
First, I hope you deleted the output from the other 13
files in the first and last commands because otherwise
I don't understand where it went.
Second, your 2nd command should work fine to change
the filemodifydate. I even broke out the Windows box
here and tested this exact command and it works fine
for me. Try using the -v3 option to see if that sheds
any more light on the subject (you should get an indication
that exiftool is shifting FileModifyDate, and a list of the
files that it reads).
Also, the -overwrite_original option is not necessary when
just writing filemodifydate since this is a "pseudo" tag which
doesn't require rewriting of the file.
- Phil
Title: Re: Problem Setting FileModifyDate
Post by: Archive on May 12, 2010, 08:54:22 AM
Post by: Archive on May 12, 2010, 08:54:22 AM
[Originally posted by justin on 2008-07-13 20:06:07-07]
Hi Phil, yes I did delete the other 13 results to keep the post smaller. As you suspected the problem was a pearl/windows DST issue, I used XnView to set the file modified date on the jpg files I was working on earlier. However, it could not cope with the 3 NEF files I have from 2007 so I have performed the tests you suggested and the results are below:
Hi Phil, yes I did delete the other 13 results to keep the post smaller. As you suspected the problem was a pearl/windows DST issue, I used XnView to set the file modified date on the jpg files I was working on earlier. However, it could not cope with the 3 NEF files I have from 2007 so I have performed the tests you suggested and the results are below:
Code:
D:\Photos\Library\2007\03\25>exiftool -alldates -fileModifyDate -s -G1 *
======== 2007-03-25_D50_DSC_4513.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:16
[ExifIFD] CreateDate : 2007:03:25 18:35:16
[IFD0] ModifyDate : 2007:03:25 18:35:16
[File] FileModifyDate : 2007:03:25 19:35:16
======== 2007-03-25_D50_DSC_4514.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:37
[ExifIFD] CreateDate : 2007:03:25 18:35:37
[IFD0] ModifyDate : 2007:03:25 18:35:37
[File] FileModifyDate : 2007:03:25 19:35:37
======== 2007-03-25_D50_DSC_4515.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:59
[ExifIFD] CreateDate : 2007:03:25 18:35:59
[IFD0] ModifyDate : 2007:03:25 18:35:59
[File] FileModifyDate : 2007:03:25 19:35:59
3 image files read
D:\Photos\Library\2007\03\25>exiftool "-filemodifydate-=1" -v3 *
Shifting File:FileModifyDate if tag exists
======== 2007-03-25_D50_DSC_4513.NEF
======== 2007-03-25_D50_DSC_4514.NEF
======== 2007-03-25_D50_DSC_4515.NEF
0 image files updated
3 image files unchanged
D:\Photos\Library\2007\03\25>exiftool -alldates -fileModifyDate -s -G1 *
======== 2007-03-25_D50_DSC_4513.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:16
[ExifIFD] CreateDate : 2007:03:25 18:35:16
[IFD0] ModifyDate : 2007:03:25 18:35:16
[File] FileModifyDate : 2007:03:25 19:35:16
======== 2007-03-25_D50_DSC_4514.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:37
[ExifIFD] CreateDate : 2007:03:25 18:35:37
[IFD0] ModifyDate : 2007:03:25 18:35:37
[File] FileModifyDate : 2007:03:25 19:35:37
======== 2007-03-25_D50_DSC_4515.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:59
[ExifIFD] CreateDate : 2007:03:25 18:35:59
[IFD0] ModifyDate : 2007:03:25 18:35:59
[File] FileModifyDate : 2007:03:25 19:35:59
3 image files read
D:\Photos\Library\2007\03\25>
Many thanks for your help! Justin..======== 2007-03-25_D50_DSC_4513.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:16
[ExifIFD] CreateDate : 2007:03:25 18:35:16
[IFD0] ModifyDate : 2007:03:25 18:35:16
[File] FileModifyDate : 2007:03:25 19:35:16
======== 2007-03-25_D50_DSC_4514.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:37
[ExifIFD] CreateDate : 2007:03:25 18:35:37
[IFD0] ModifyDate : 2007:03:25 18:35:37
[File] FileModifyDate : 2007:03:25 19:35:37
======== 2007-03-25_D50_DSC_4515.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:59
[ExifIFD] CreateDate : 2007:03:25 18:35:59
[IFD0] ModifyDate : 2007:03:25 18:35:59
[File] FileModifyDate : 2007:03:25 19:35:59
3 image files read
D:\Photos\Library\2007\03\25>exiftool "-filemodifydate-=1" -v3 *
Shifting File:FileModifyDate if tag exists
======== 2007-03-25_D50_DSC_4513.NEF
======== 2007-03-25_D50_DSC_4514.NEF
======== 2007-03-25_D50_DSC_4515.NEF
0 image files updated
3 image files unchanged
D:\Photos\Library\2007\03\25>exiftool -alldates -fileModifyDate -s -G1 *
======== 2007-03-25_D50_DSC_4513.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:16
[ExifIFD] CreateDate : 2007:03:25 18:35:16
[IFD0] ModifyDate : 2007:03:25 18:35:16
[File] FileModifyDate : 2007:03:25 19:35:16
======== 2007-03-25_D50_DSC_4514.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:37
[ExifIFD] CreateDate : 2007:03:25 18:35:37
[IFD0] ModifyDate : 2007:03:25 18:35:37
[File] FileModifyDate : 2007:03:25 19:35:37
======== 2007-03-25_D50_DSC_4515.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:59
[ExifIFD] CreateDate : 2007:03:25 18:35:59
[IFD0] ModifyDate : 2007:03:25 18:35:59
[File] FileModifyDate : 2007:03:25 19:35:59
3 image files read
D:\Photos\Library\2007\03\25>
Title: Re: Problem Setting FileModifyDate
Post by: Archive on May 12, 2010, 08:54:22 AM
Post by: Archive on May 12, 2010, 08:54:22 AM
[Originally posted by exiftool on 2008-07-14 00:16:46-07]
Thanks. That looks good but for some
reason it works for me but not you.
What exiftool version are you using,
and what operating system? I was
using exiftool.exe 7.36 and Windows
XP service pack 2.
Thanks. That looks good but for some
reason it works for me but not you.
What exiftool version are you using,
and what operating system? I was
using exiftool.exe 7.36 and Windows
XP service pack 2.
Title: Re: Problem Setting FileModifyDate
Post by: Archive on May 12, 2010, 08:54:22 AM
Post by: Archive on May 12, 2010, 08:54:22 AM
[Originally posted by justin on 2008-07-14 06:29:10-07]
I'm using Exiftool 7.36 and Windows XP Pro service pack 3. I'll see if I can ask my wife to email the three files to me at work and I'll perform some more tests on another computer.
I'm using Exiftool 7.36 and Windows XP Pro service pack 3. I'll see if I can ask my wife to email the three files to me at work and I'll perform some more tests on another computer.
Title: Re: Problem Setting FileModifyDate
Post by: Archive on May 12, 2010, 08:54:22 AM
Post by: Archive on May 12, 2010, 08:54:22 AM
[Originally posted by justin on 2008-07-14 08:41:36-07]
Hi Phil, right, SWMBO has emailed me the files in question and I have performed the tests below. My work computer is also a windows XP pro sp3 machine and I'm using exiftool 7.36. However note that I can successfully shift the filemodifydate by one hour prior to setting it to the exif createdate. Only after that operation can I no longer shift the filemodifydate:
It's almost like once I have set the filemodifydate to the createdate, exiftool can no longer see the filemodifydate tag (in write mode). Having thought about this for a minute, I decided to try and manually set one of the images to the correct time:
Hi Phil, right, SWMBO has emailed me the files in question and I have performed the tests below. My work computer is also a windows XP pro sp3 machine and I'm using exiftool 7.36. However note that I can successfully shift the filemodifydate by one hour prior to setting it to the exif createdate. Only after that operation can I no longer shift the filemodifydate:
Code:
C:\nefs>exiftool -alldates -fileModifyDate -s -G1 *
======== 2007-03-25_D50_DSC_4513.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:16
[ExifIFD] CreateDate : 2007:03:25 18:35:16
[IFD0] ModifyDate : 2007:03:25 18:35:16
[File] FileModifyDate : 2008:07:14 10:01:57
======== 2007-03-25_D50_DSC_4514.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:37
[ExifIFD] CreateDate : 2007:03:25 18:35:37
[IFD0] ModifyDate : 2007:03:25 18:35:37
[File] FileModifyDate : 2008:07:14 10:02:07
======== 2007-03-25_D50_DSC_4515.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:59
[ExifIFD] CreateDate : 2007:03:25 18:35:59
[IFD0] ModifyDate : 2007:03:25 18:35:59
[File] FileModifyDate : 2008:07:14 10:02:02
3 image files read
C:\nefs>exiftool "-fileModifyDate-=1" * -v3
Shifting File:FileModifyDate if tag exists
======== 2007-03-25_D50_DSC_4513.NEF
+ FileModifyDate = '1216022517'
======== 2007-03-25_D50_DSC_4514.NEF
+ FileModifyDate = '1216022527'
======== 2007-03-25_D50_DSC_4515.NEF
+ FileModifyDate = '1216022522'
3 image files updated
C:\nefs>exiftool -alldates -fileModifyDate -s -G1 *
======== 2007-03-25_D50_DSC_4513.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:16
[ExifIFD] CreateDate : 2007:03:25 18:35:16
[IFD0] ModifyDate : 2007:03:25 18:35:16
[File] FileModifyDate : 2008:07:14 09:01:57
======== 2007-03-25_D50_DSC_4514.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:37
[ExifIFD] CreateDate : 2007:03:25 18:35:37
[IFD0] ModifyDate : 2007:03:25 18:35:37
[File] FileModifyDate : 2008:07:14 09:02:07
======== 2007-03-25_D50_DSC_4515.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:59
[ExifIFD] CreateDate : 2007:03:25 18:35:59
[IFD0] ModifyDate : 2007:03:25 18:35:59
[File] FileModifyDate : 2008:07:14 09:02:02
3 image files read
C:\nefs>exiftool "-fileModifyDate<createdate" * -v3
======== 2007-03-25_D50_DSC_4513.NEF
Setting new values from 2007-03-25_D50_DSC_4513.NEF
Writing File:FileModifyDate
+ FileModifyDate = '1174847716'
======== 2007-03-25_D50_DSC_4514.NEF
Setting new values from 2007-03-25_D50_DSC_4514.NEF
Writing File:FileModifyDate
+ FileModifyDate = '1174847737'
======== 2007-03-25_D50_DSC_4515.NEF
Setting new values from 2007-03-25_D50_DSC_4515.NEF
Writing File:FileModifyDate
+ FileModifyDate = '1174847759'
3 image files updated
C:\nefs>exiftool -alldates -fileModifyDate -s -G1 *
======== 2007-03-25_D50_DSC_4513.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:16
[ExifIFD] CreateDate : 2007:03:25 18:35:16
[IFD0] ModifyDate : 2007:03:25 18:35:16
[File] FileModifyDate : 2007:03:25 19:35:16
======== 2007-03-25_D50_DSC_4514.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:37
[ExifIFD] CreateDate : 2007:03:25 18:35:37
[IFD0] ModifyDate : 2007:03:25 18:35:37
[File] FileModifyDate : 2007:03:25 19:35:37
======== 2007-03-25_D50_DSC_4515.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:59
[ExifIFD] CreateDate : 2007:03:25 18:35:59
[IFD0] ModifyDate : 2007:03:25 18:35:59
[File] FileModifyDate : 2007:03:25 19:35:59
3 image files read
C:\nefs>exiftool "-fileModifyDate-=1" * -v3
Shifting File:FileModifyDate if tag exists
======== 2007-03-25_D50_DSC_4513.NEF
======== 2007-03-25_D50_DSC_4514.NEF
======== 2007-03-25_D50_DSC_4515.NEF
0 image files updated
3 image files unchanged
C:\nefs>exiftool -alldates -fileModifyDate -s -G1 *
======== 2007-03-25_D50_DSC_4513.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:16
[ExifIFD] CreateDate : 2007:03:25 18:35:16
[IFD0] ModifyDate : 2007:03:25 18:35:16
[File] FileModifyDate : 2007:03:25 19:35:16
======== 2007-03-25_D50_DSC_4514.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:37
[ExifIFD] CreateDate : 2007:03:25 18:35:37
[IFD0] ModifyDate : 2007:03:25 18:35:37
[File] FileModifyDate : 2007:03:25 19:35:37
======== 2007-03-25_D50_DSC_4515.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:59
[ExifIFD] CreateDate : 2007:03:25 18:35:59
[IFD0] ModifyDate : 2007:03:25 18:35:59
[File] FileModifyDate : 2007:03:25 19:35:59
3 image files read
C:\nefs>
Note that the problem with the hour difference between the createdate and the filemodfiydate still exists.======== 2007-03-25_D50_DSC_4513.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:16
[ExifIFD] CreateDate : 2007:03:25 18:35:16
[IFD0] ModifyDate : 2007:03:25 18:35:16
[File] FileModifyDate : 2008:07:14 10:01:57
======== 2007-03-25_D50_DSC_4514.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:37
[ExifIFD] CreateDate : 2007:03:25 18:35:37
[IFD0] ModifyDate : 2007:03:25 18:35:37
[File] FileModifyDate : 2008:07:14 10:02:07
======== 2007-03-25_D50_DSC_4515.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:59
[ExifIFD] CreateDate : 2007:03:25 18:35:59
[IFD0] ModifyDate : 2007:03:25 18:35:59
[File] FileModifyDate : 2008:07:14 10:02:02
3 image files read
C:\nefs>exiftool "-fileModifyDate-=1" * -v3
Shifting File:FileModifyDate if tag exists
======== 2007-03-25_D50_DSC_4513.NEF
+ FileModifyDate = '1216022517'
======== 2007-03-25_D50_DSC_4514.NEF
+ FileModifyDate = '1216022527'
======== 2007-03-25_D50_DSC_4515.NEF
+ FileModifyDate = '1216022522'
3 image files updated
C:\nefs>exiftool -alldates -fileModifyDate -s -G1 *
======== 2007-03-25_D50_DSC_4513.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:16
[ExifIFD] CreateDate : 2007:03:25 18:35:16
[IFD0] ModifyDate : 2007:03:25 18:35:16
[File] FileModifyDate : 2008:07:14 09:01:57
======== 2007-03-25_D50_DSC_4514.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:37
[ExifIFD] CreateDate : 2007:03:25 18:35:37
[IFD0] ModifyDate : 2007:03:25 18:35:37
[File] FileModifyDate : 2008:07:14 09:02:07
======== 2007-03-25_D50_DSC_4515.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:59
[ExifIFD] CreateDate : 2007:03:25 18:35:59
[IFD0] ModifyDate : 2007:03:25 18:35:59
[File] FileModifyDate : 2008:07:14 09:02:02
3 image files read
C:\nefs>exiftool "-fileModifyDate<createdate" * -v3
======== 2007-03-25_D50_DSC_4513.NEF
Setting new values from 2007-03-25_D50_DSC_4513.NEF
Writing File:FileModifyDate
+ FileModifyDate = '1174847716'
======== 2007-03-25_D50_DSC_4514.NEF
Setting new values from 2007-03-25_D50_DSC_4514.NEF
Writing File:FileModifyDate
+ FileModifyDate = '1174847737'
======== 2007-03-25_D50_DSC_4515.NEF
Setting new values from 2007-03-25_D50_DSC_4515.NEF
Writing File:FileModifyDate
+ FileModifyDate = '1174847759'
3 image files updated
C:\nefs>exiftool -alldates -fileModifyDate -s -G1 *
======== 2007-03-25_D50_DSC_4513.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:16
[ExifIFD] CreateDate : 2007:03:25 18:35:16
[IFD0] ModifyDate : 2007:03:25 18:35:16
[File] FileModifyDate : 2007:03:25 19:35:16
======== 2007-03-25_D50_DSC_4514.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:37
[ExifIFD] CreateDate : 2007:03:25 18:35:37
[IFD0] ModifyDate : 2007:03:25 18:35:37
[File] FileModifyDate : 2007:03:25 19:35:37
======== 2007-03-25_D50_DSC_4515.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:59
[ExifIFD] CreateDate : 2007:03:25 18:35:59
[IFD0] ModifyDate : 2007:03:25 18:35:59
[File] FileModifyDate : 2007:03:25 19:35:59
3 image files read
C:\nefs>exiftool "-fileModifyDate-=1" * -v3
Shifting File:FileModifyDate if tag exists
======== 2007-03-25_D50_DSC_4513.NEF
======== 2007-03-25_D50_DSC_4514.NEF
======== 2007-03-25_D50_DSC_4515.NEF
0 image files updated
3 image files unchanged
C:\nefs>exiftool -alldates -fileModifyDate -s -G1 *
======== 2007-03-25_D50_DSC_4513.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:16
[ExifIFD] CreateDate : 2007:03:25 18:35:16
[IFD0] ModifyDate : 2007:03:25 18:35:16
[File] FileModifyDate : 2007:03:25 19:35:16
======== 2007-03-25_D50_DSC_4514.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:37
[ExifIFD] CreateDate : 2007:03:25 18:35:37
[IFD0] ModifyDate : 2007:03:25 18:35:37
[File] FileModifyDate : 2007:03:25 19:35:37
======== 2007-03-25_D50_DSC_4515.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:59
[ExifIFD] CreateDate : 2007:03:25 18:35:59
[IFD0] ModifyDate : 2007:03:25 18:35:59
[File] FileModifyDate : 2007:03:25 19:35:59
3 image files read
C:\nefs>
It's almost like once I have set the filemodifydate to the createdate, exiftool can no longer see the filemodifydate tag (in write mode). Having thought about this for a minute, I decided to try and manually set one of the images to the correct time:
Code:
C:\nefs>exiftool "-fileModifyDate=2007:03:25 18:35:59" *4515.NEF -v3
Writing File:FileModifyDate
======== 2007-03-25_D50_DSC_4515.NEF
+ FileModifyDate = '1174847759'
1 image files updated
C:\nefs>exiftool -alldates -fileModifyDate -s -G1 *4515.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:59
[ExifIFD] CreateDate : 2007:03:25 18:35:59
[IFD0] ModifyDate : 2007:03:25 18:35:59
[File] FileModifyDate : 2007:03:25 19:35:59
C:\nefs>
Notice that the data has been writen but the DST issue still exists. Justin..Writing File:FileModifyDate
======== 2007-03-25_D50_DSC_4515.NEF
+ FileModifyDate = '1174847759'
1 image files updated
C:\nefs>exiftool -alldates -fileModifyDate -s -G1 *4515.NEF
[ExifIFD] DateTimeOriginal : 2007:03:25 18:35:59
[ExifIFD] CreateDate : 2007:03:25 18:35:59
[IFD0] ModifyDate : 2007:03:25 18:35:59
[File] FileModifyDate : 2007:03:25 19:35:59
C:\nefs>
Title: Re: Problem Setting FileModifyDate
Post by: Archive on May 12, 2010, 08:54:22 AM
Post by: Archive on May 12, 2010, 08:54:22 AM
[Originally posted by exiftool on 2008-07-14 11:22:09-07]
Hi Justin,
This narrows it down a bit, thanks. I try repeating these
steps with my system tonight. My only guess is that
somehow the date/time routines are seeing this as an
invalid date after you change it, and so aren't setting
the date/time properly. I'll check this. Keep in mind
that the FileModifyDate isn't stored in the file, but
is part of the filesystem. So the file itself is not changed
when you set FileModifyDate.
Hi Justin,
This narrows it down a bit, thanks. I try repeating these
steps with my system tonight. My only guess is that
somehow the date/time routines are seeing this as an
invalid date after you change it, and so aren't setting
the date/time properly. I'll check this. Keep in mind
that the FileModifyDate isn't stored in the file, but
is part of the filesystem. So the file itself is not changed
when you set FileModifyDate.
Title: Re: Problem Setting FileModifyDate
Post by: Archive on May 12, 2010, 08:54:23 AM
Post by: Archive on May 12, 2010, 08:54:23 AM
[Originally posted by justin on 2008-07-16 07:06:32-07]
Hi Phil, I just wondered if you got chance to try reproducing the result of the testing I did on this?
Hi Phil, I just wondered if you got chance to try reproducing the result of the testing I did on this?
Title: Re: Problem Setting FileModifyDate
Post by: Archive on May 12, 2010, 08:54:23 AM
Post by: Archive on May 12, 2010, 08:54:23 AM
[Originally posted by exiftool on 2008-07-16 10:42:21-07]
Ooops. Thanks for reminding me, I had forgotten to do this.
I'll try to remember to drag out the PC tonight.
- Phil
Ooops. Thanks for reminding me, I had forgotten to do this.
I'll try to remember to drag out the PC tonight.
- Phil
Title: Re: Problem Setting FileModifyDate
Post by: Archive on May 12, 2010, 08:54:23 AM
Post by: Archive on May 12, 2010, 08:54:23 AM
[Originally posted by justin on 2008-07-16 14:03:06-07]
No probs at all Phil. I felt guilty 'chasing you up' because the support you provide for your userbase through this forum is magnificent and way beyond the call of duty. Once again, thanks for all your help!
No probs at all Phil. I felt guilty 'chasing you up' because the support you provide for your userbase through this forum is magnificent and way beyond the call of duty. Once again, thanks for all your help!
Title: Re: Problem Setting FileModifyDate
Post by: Archive on May 12, 2010, 08:54:23 AM
Post by: Archive on May 12, 2010, 08:54:23 AM
[Originally posted by exiftool on 2008-07-17 00:41:42-07]
Cool. PC's are wonderful.
I've managed to reproduce your problem. The problem
disappears if you turn off "Automatically adjust clock for
daylight savings time" in your Date and Time settings.
Maybe this is the best "solution" to the problem.
With this setting on, writing the FileModifyDate of
"2007:03:25 18:35:16" results in a time that is 1 hour
too late. And to be absolutely consistent in this inconsistency,
subtracting an hour from this time does nothing (as you
observed). This is because exiftool subtracts an hour but
Windows adds it back again, so nothing is done.
To actually subtract one hour from this time, you
need to subtract two hours on the command line.
Remember, I did say that PC's are wonderful!
I haven't looked at my code in detail, but I suspect there
is nothing I can do to fix this. It is just some weird inconsistency
in the way that daylight savings time is handled in your
time zone. When I set my computer back to Eastern Daylight
time, this problem does not occur on the day when daylight
savings time started in this time zone (2007:03:11), except
if I try to set an invalid time like 02:30:00. But this is to be
expected because local time 02:30:00 doesn't exist on this
day since the clocks here jump forward from 02:00:00 to
03:00:00 at the start of DST. For other times before 02:00:00
and after 03:00:00 on this date, the FileModifyDate can be
set as expected.
In your time zone, the jump occurs from 01:00:00 to 02:00:00
on 2007:03:25, so setting times in this range will do funny things.
But your times are around 18:00, so I don't see why there
should be a problem, but there is.
- Phil
Cool. PC's are wonderful.
I've managed to reproduce your problem. The problem
disappears if you turn off "Automatically adjust clock for
daylight savings time" in your Date and Time settings.
Maybe this is the best "solution" to the problem.
With this setting on, writing the FileModifyDate of
"2007:03:25 18:35:16" results in a time that is 1 hour
too late. And to be absolutely consistent in this inconsistency,
subtracting an hour from this time does nothing (as you
observed). This is because exiftool subtracts an hour but
Windows adds it back again, so nothing is done.
To actually subtract one hour from this time, you
need to subtract two hours on the command line.
Remember, I did say that PC's are wonderful!
I haven't looked at my code in detail, but I suspect there
is nothing I can do to fix this. It is just some weird inconsistency
in the way that daylight savings time is handled in your
time zone. When I set my computer back to Eastern Daylight
time, this problem does not occur on the day when daylight
savings time started in this time zone (2007:03:11), except
if I try to set an invalid time like 02:30:00. But this is to be
expected because local time 02:30:00 doesn't exist on this
day since the clocks here jump forward from 02:00:00 to
03:00:00 at the start of DST. For other times before 02:00:00
and after 03:00:00 on this date, the FileModifyDate can be
set as expected.
In your time zone, the jump occurs from 01:00:00 to 02:00:00
on 2007:03:25, so setting times in this range will do funny things.
But your times are around 18:00, so I don't see why there
should be a problem, but there is.
- Phil
Title: Re: Problem Setting FileModifyDate
Post by: Archive on May 12, 2010, 08:54:23 AM
Post by: Archive on May 12, 2010, 08:54:23 AM
[Originally posted by exiftool on 2008-07-18 00:30:32-07]
I did some more testing with various versions of Perl,
and this problem goes away if I update to a more recent
version of ActivePerl. I will do some more testing with
this version to be sure it doesn't cause any problems,
and bundle it with the next Windows version of exiftool
(version 7.38) if everything goes OK.
- Phil
I did some more testing with various versions of Perl,
and this problem goes away if I update to a more recent
version of ActivePerl. I will do some more testing with
this version to be sure it doesn't cause any problems,
and bundle it with the next Windows version of exiftool
(version 7.38) if everything goes OK.
- Phil
Title: Re: Problem Setting FileModifyDate
Post by: Archive on May 12, 2010, 08:54:23 AM
Post by: Archive on May 12, 2010, 08:54:23 AM
[Originally posted by justin on 2008-07-18 11:15:00-07]
Hi Phil, I got round to testing with the "auto adjust for daylight savings" turned off with the following results:
Note that with the "auto adjust" turned off, all the times change by 2 hours! This has left me scratching my head a little. Looks like the later version of Pearl may be worthy of consideration.
Hi Phil, I got round to testing with the "auto adjust for daylight savings" turned off with the following results:
Code:
C:\nefs>exiftool -alldates -filemodifydate *
======== 2007-03-25_D50_DSC_4513.NEF
Date/Time Original : 2007:03:25 18:35:16
Create Date : 2007:03:25 18:35:16
Modify Date : 2007:03:25 18:35:16
File Modification Date/Time : 2008:07:14 16:02:49
======== 2007-03-25_D50_DSC_4514.NEF
Date/Time Original : 2007:03:25 18:35:37
Create Date : 2007:03:25 18:35:37
Modify Date : 2007:03:25 18:35:37
File Modification Date/Time : 2008:07:14 16:02:49
======== 2007-03-25_D50_DSC_4515.NEF
Date/Time Original : 2007:03:25 18:35:59
Create Date : 2007:03:25 18:35:59
Modify Date : 2007:03:25 18:35:59
File Modification Date/Time : 2008:07:14 16:02:49
======== DSC_1056.NEF
Date/Time Original : 2008:06:18 15:10:17
Create Date : 2008:06:18 15:10:17
Modify Date : 2008:06:18 15:10:17
File Modification Date/Time : 2008:06:18 16:10:20
4 image files read
C:\nefs>exiftool "-filemodifydate<createdate" *
4 image files updated
C:\nefs>exiftool -alldates -filemodifydate *
======== 2007-03-25_D50_DSC_4513.NEF
Date/Time Original : 2007:03:25 18:35:16
Create Date : 2007:03:25 18:35:16
Modify Date : 2007:03:25 18:35:16
File Modification Date/Time : 2007:03:25 19:35:16
======== 2007-03-25_D50_DSC_4514.NEF
Date/Time Original : 2007:03:25 18:35:37
Create Date : 2007:03:25 18:35:37
Modify Date : 2007:03:25 18:35:37
File Modification Date/Time : 2007:03:25 19:35:37
======== 2007-03-25_D50_DSC_4515.NEF
Date/Time Original : 2007:03:25 18:35:59
Create Date : 2007:03:25 18:35:59
Modify Date : 2007:03:25 18:35:59
File Modification Date/Time : 2007:03:25 19:35:59
======== DSC_1056.NEF
Date/Time Original : 2008:06:18 15:10:17
Create Date : 2008:06:18 15:10:17
Modify Date : 2008:06:18 15:10:17
File Modification Date/Time : 2008:06:18 15:10:17
4 image files read
C:\nefs>exiftool -filemodifydate-=1 *
1 image files updated
3 image files unchanged
C:\nefs>exiftool -alldates -filemodifydate *
======== 2007-03-25_D50_DSC_4513.NEF
Date/Time Original : 2007:03:25 18:35:16
Create Date : 2007:03:25 18:35:16
Modify Date : 2007:03:25 18:35:16
File Modification Date/Time : 2007:03:25 19:35:16
======== 2007-03-25_D50_DSC_4514.NEF
Date/Time Original : 2007:03:25 18:35:37
Create Date : 2007:03:25 18:35:37
Modify Date : 2007:03:25 18:35:37
File Modification Date/Time : 2007:03:25 19:35:37
======== 2007-03-25_D50_DSC_4515.NEF
Date/Time Original : 2007:03:25 18:35:59
Create Date : 2007:03:25 18:35:59
Modify Date : 2007:03:25 18:35:59
File Modification Date/Time : 2007:03:25 19:35:59
======== DSC_1056.NEF
Date/Time Original : 2008:06:18 15:10:17
Create Date : 2008:06:18 15:10:17
Modify Date : 2008:06:18 15:10:17
File Modification Date/Time : 2008:06:18 14:10:17
4 image files read
***** AT THIS POINT I DISABLED "AUTOMATICALLY ADJUST FOR DAYLIGHT SAVINGS" *****
C:\nefs>exiftool -filemodifydate-=1 *
4 image files updated
C:\nefs>exiftool -alldates -filemodifydate *
======== 2007-03-25_D50_DSC_4513.NEF
Date/Time Original : 2007:03:25 18:35:16
Create Date : 2007:03:25 18:35:16
Modify Date : 2007:03:25 18:35:16
File Modification Date/Time : 2007:03:25 17:35:16
======== 2007-03-25_D50_DSC_4514.NEF
Date/Time Original : 2007:03:25 18:35:37
Create Date : 2007:03:25 18:35:37
Modify Date : 2007:03:25 18:35:37
File Modification Date/Time : 2007:03:25 17:35:37
======== 2007-03-25_D50_DSC_4515.NEF
Date/Time Original : 2007:03:25 18:35:59
Create Date : 2007:03:25 18:35:59
Modify Date : 2007:03:25 18:35:59
File Modification Date/Time : 2007:03:25 17:35:59
======== DSC_1056.NEF
Date/Time Original : 2008:06:18 15:10:17
Create Date : 2008:06:18 15:10:17
Modify Date : 2008:06:18 15:10:17
File Modification Date/Time : 2008:06:18 12:10:17
4 image files read
C:\nefs>
======== 2007-03-25_D50_DSC_4513.NEF
Date/Time Original : 2007:03:25 18:35:16
Create Date : 2007:03:25 18:35:16
Modify Date : 2007:03:25 18:35:16
File Modification Date/Time : 2008:07:14 16:02:49
======== 2007-03-25_D50_DSC_4514.NEF
Date/Time Original : 2007:03:25 18:35:37
Create Date : 2007:03:25 18:35:37
Modify Date : 2007:03:25 18:35:37
File Modification Date/Time : 2008:07:14 16:02:49
======== 2007-03-25_D50_DSC_4515.NEF
Date/Time Original : 2007:03:25 18:35:59
Create Date : 2007:03:25 18:35:59
Modify Date : 2007:03:25 18:35:59
File Modification Date/Time : 2008:07:14 16:02:49
======== DSC_1056.NEF
Date/Time Original : 2008:06:18 15:10:17
Create Date : 2008:06:18 15:10:17
Modify Date : 2008:06:18 15:10:17
File Modification Date/Time : 2008:06:18 16:10:20
4 image files read
C:\nefs>exiftool "-filemodifydate<createdate" *
4 image files updated
C:\nefs>exiftool -alldates -filemodifydate *
======== 2007-03-25_D50_DSC_4513.NEF
Date/Time Original : 2007:03:25 18:35:16
Create Date : 2007:03:25 18:35:16
Modify Date : 2007:03:25 18:35:16
File Modification Date/Time : 2007:03:25 19:35:16
======== 2007-03-25_D50_DSC_4514.NEF
Date/Time Original : 2007:03:25 18:35:37
Create Date : 2007:03:25 18:35:37
Modify Date : 2007:03:25 18:35:37
File Modification Date/Time : 2007:03:25 19:35:37
======== 2007-03-25_D50_DSC_4515.NEF
Date/Time Original : 2007:03:25 18:35:59
Create Date : 2007:03:25 18:35:59
Modify Date : 2007:03:25 18:35:59
File Modification Date/Time : 2007:03:25 19:35:59
======== DSC_1056.NEF
Date/Time Original : 2008:06:18 15:10:17
Create Date : 2008:06:18 15:10:17
Modify Date : 2008:06:18 15:10:17
File Modification Date/Time : 2008:06:18 15:10:17
4 image files read
C:\nefs>exiftool -filemodifydate-=1 *
1 image files updated
3 image files unchanged
C:\nefs>exiftool -alldates -filemodifydate *
======== 2007-03-25_D50_DSC_4513.NEF
Date/Time Original : 2007:03:25 18:35:16
Create Date : 2007:03:25 18:35:16
Modify Date : 2007:03:25 18:35:16
File Modification Date/Time : 2007:03:25 19:35:16
======== 2007-03-25_D50_DSC_4514.NEF
Date/Time Original : 2007:03:25 18:35:37
Create Date : 2007:03:25 18:35:37
Modify Date : 2007:03:25 18:35:37
File Modification Date/Time : 2007:03:25 19:35:37
======== 2007-03-25_D50_DSC_4515.NEF
Date/Time Original : 2007:03:25 18:35:59
Create Date : 2007:03:25 18:35:59
Modify Date : 2007:03:25 18:35:59
File Modification Date/Time : 2007:03:25 19:35:59
======== DSC_1056.NEF
Date/Time Original : 2008:06:18 15:10:17
Create Date : 2008:06:18 15:10:17
Modify Date : 2008:06:18 15:10:17
File Modification Date/Time : 2008:06:18 14:10:17
4 image files read
***** AT THIS POINT I DISABLED "AUTOMATICALLY ADJUST FOR DAYLIGHT SAVINGS" *****
C:\nefs>exiftool -filemodifydate-=1 *
4 image files updated
C:\nefs>exiftool -alldates -filemodifydate *
======== 2007-03-25_D50_DSC_4513.NEF
Date/Time Original : 2007:03:25 18:35:16
Create Date : 2007:03:25 18:35:16
Modify Date : 2007:03:25 18:35:16
File Modification Date/Time : 2007:03:25 17:35:16
======== 2007-03-25_D50_DSC_4514.NEF
Date/Time Original : 2007:03:25 18:35:37
Create Date : 2007:03:25 18:35:37
Modify Date : 2007:03:25 18:35:37
File Modification Date/Time : 2007:03:25 17:35:37
======== 2007-03-25_D50_DSC_4515.NEF
Date/Time Original : 2007:03:25 18:35:59
Create Date : 2007:03:25 18:35:59
Modify Date : 2007:03:25 18:35:59
File Modification Date/Time : 2007:03:25 17:35:59
======== DSC_1056.NEF
Date/Time Original : 2008:06:18 15:10:17
Create Date : 2008:06:18 15:10:17
Modify Date : 2008:06:18 15:10:17
File Modification Date/Time : 2008:06:18 12:10:17
4 image files read
C:\nefs>
Note that with the "auto adjust" turned off, all the times change by 2 hours! This has left me scratching my head a little. Looks like the later version of Pearl may be worthy of consideration.
Title: Re: Problem Setting FileModifyDate
Post by: Archive on May 12, 2010, 08:54:23 AM
Post by: Archive on May 12, 2010, 08:54:23 AM
[Originally posted by exiftool on 2008-07-18 12:17:57-07]
There is certainly something I still don't understand about the
behavour, but since it appears to be a bug in ActivePerl 5.8.7,
I'm not going to spend any more time trying to figure it out.
Instead, I'm pursuing the Perl upgrade path, but after a number of
hours trying to get the PAR packager working with the updated Perl,
I still haven't got it running yet. So this may take a while. I'll
let you know when I have something ready.
- Phil
There is certainly something I still don't understand about the
behavour, but since it appears to be a bug in ActivePerl 5.8.7,
I'm not going to spend any more time trying to figure it out.
Instead, I'm pursuing the Perl upgrade path, but after a number of
hours trying to get the PAR packager working with the updated Perl,
I still haven't got it running yet. So this may take a while. I'll
let you know when I have something ready.
- Phil
Title: Re: Problem Setting FileModifyDate
Post by: Archive on May 12, 2010, 08:54:23 AM
Post by: Archive on May 12, 2010, 08:54:23 AM
[Originally posted by justin on 2008-07-18 14:31:30-07]
Thanks Phil. If you would like me to do any more testing at any stage I'd be more than happy to oblige
Thanks Phil. If you would like me to do any more testing at any stage I'd be more than happy to oblige
Title: Re: Problem Setting FileModifyDate
Post by: Archive on May 12, 2010, 08:54:23 AM
Post by: Archive on May 12, 2010, 08:54:23 AM
[Originally posted by exiftool on 2008-07-18 17:10:10-07]
I've got something for you to try out:
exiftool-7.38.zip
This is the same as version 7.37, but bundled with Perl 5.10.0
instead of Perl 5.8.7. I'm not 100% happy with this for two reasons:
1) Modules that should be included automatically in the package
aren't, so I have to load them explicitly at run time which increases
the time needed to launch exiftool by a small bit. (I hope to
figure out a way around this.)
2) The new perl is bigger, so the zip file is about 2.4 MB now instead
of 1.9 MB. But I knew this would happen and there is no way around it.
However, it does seem to fix the DST problem in my tests.
- Phil
I've got something for you to try out:
exiftool-7.38.zip
This is the same as version 7.37, but bundled with Perl 5.10.0
instead of Perl 5.8.7. I'm not 100% happy with this for two reasons:
1) Modules that should be included automatically in the package
aren't, so I have to load them explicitly at run time which increases
the time needed to launch exiftool by a small bit. (I hope to
figure out a way around this.)
2) The new perl is bigger, so the zip file is about 2.4 MB now instead
of 1.9 MB. But I knew this would happen and there is no way around it.
However, it does seem to fix the DST problem in my tests.
- Phil
Title: Re: Problem Setting FileModifyDate
Post by: Archive on May 12, 2010, 08:54:23 AM
Post by: Archive on May 12, 2010, 08:54:23 AM
[Originally posted by justin on 2008-07-18 19:51:26-07]
Hi Phil, it looks like you've cracked it! Below, I have tested both setting the -filemodifydate from the -createdate and shifting the -filemodifydate back and forward one hour - all with DST enabled on my machine. As far as I can tell it looks perfect!
Hi Phil, it looks like you've cracked it! Below, I have tested both setting the -filemodifydate from the -createdate and shifting the -filemodifydate back and forward one hour - all with DST enabled on my machine. As far as I can tell it looks perfect!
Code:
D:\Photos\Library\2007\03\25>exiftool -alldates -filemodifydate *
======== 2007-03-25_D50_DSC_4513.NEF
Date/Time Original : 2007:03:25 18:35:16
Create Date : 2007:03:25 18:35:16
Modify Date : 2007:03:25 18:35:16
File Modification Date/Time : 2007:03:25 19:35:16
======== 2007-03-25_D50_DSC_4514.NEF
Date/Time Original : 2007:03:25 18:35:37
Create Date : 2007:03:25 18:35:37
Modify Date : 2007:03:25 18:35:37
File Modification Date/Time : 2007:03:25 19:35:37
======== 2007-03-25_D50_DSC_4515.NEF
Date/Time Original : 2007:03:25 18:35:59
Create Date : 2007:03:25 18:35:59
Modify Date : 2007:03:25 18:35:59
File Modification Date/Time : 2007:03:25 19:35:59
3 image files read
D:\Photos\Library\2007\03\25>exiftool "-filemodifydate<createdate" *
3 image files updated
D:\Photos\Library\2007\03\25>exiftool -alldates -filemodifydate *
======== 2007-03-25_D50_DSC_4513.NEF
Date/Time Original : 2007:03:25 18:35:16
Create Date : 2007:03:25 18:35:16
Modify Date : 2007:03:25 18:35:16
File Modification Date/Time : 2007:03:25 18:35:16
======== 2007-03-25_D50_DSC_4514.NEF
Date/Time Original : 2007:03:25 18:35:37
Create Date : 2007:03:25 18:35:37
Modify Date : 2007:03:25 18:35:37
File Modification Date/Time : 2007:03:25 18:35:37
======== 2007-03-25_D50_DSC_4515.NEF
Date/Time Original : 2007:03:25 18:35:59
Create Date : 2007:03:25 18:35:59
Modify Date : 2007:03:25 18:35:59
File Modification Date/Time : 2007:03:25 18:35:59
3 image files read
D:\Photos\Library\2007\03\25>exiftool -filemodifydate-=1 *
3 image files updated
D:\Photos\Library\2007\03\25>exiftool -alldates -filemodifydate *
======== 2007-03-25_D50_DSC_4513.NEF
Date/Time Original : 2007:03:25 18:35:16
Create Date : 2007:03:25 18:35:16
Modify Date : 2007:03:25 18:35:16
File Modification Date/Time : 2007:03:25 17:35:16
======== 2007-03-25_D50_DSC_4514.NEF
Date/Time Original : 2007:03:25 18:35:37
Create Date : 2007:03:25 18:35:37
Modify Date : 2007:03:25 18:35:37
File Modification Date/Time : 2007:03:25 17:35:37
======== 2007-03-25_D50_DSC_4515.NEF
Date/Time Original : 2007:03:25 18:35:59
Create Date : 2007:03:25 18:35:59
Modify Date : 2007:03:25 18:35:59
File Modification Date/Time : 2007:03:25 17:35:59
3 image files read
D:\Photos\Library\2007\03\25>exiftool -filemodifydate+=1 *
3 image files updated
D:\Photos\Library\2007\03\25>exiftool -alldates -filemodifydate *
======== 2007-03-25_D50_DSC_4513.NEF
Date/Time Original : 2007:03:25 18:35:16
Create Date : 2007:03:25 18:35:16
Modify Date : 2007:03:25 18:35:16
File Modification Date/Time : 2007:03:25 18:35:16
======== 2007-03-25_D50_DSC_4514.NEF
Date/Time Original : 2007:03:25 18:35:37
Create Date : 2007:03:25 18:35:37
Modify Date : 2007:03:25 18:35:37
File Modification Date/Time : 2007:03:25 18:35:37
======== 2007-03-25_D50_DSC_4515.NEF
Date/Time Original : 2007:03:25 18:35:59
Create Date : 2007:03:25 18:35:59
Modify Date : 2007:03:25 18:35:59
File Modification Date/Time : 2007:03:25 18:35:59
3 image files read
D:\Photos\Library\2007\03\25>
I understand that moving to a new version of Pearl is not to be taken lightly but in this case, it does seem to resolve the problem. Many thanks for all your help. Justin..======== 2007-03-25_D50_DSC_4513.NEF
Date/Time Original : 2007:03:25 18:35:16
Create Date : 2007:03:25 18:35:16
Modify Date : 2007:03:25 18:35:16
File Modification Date/Time : 2007:03:25 19:35:16
======== 2007-03-25_D50_DSC_4514.NEF
Date/Time Original : 2007:03:25 18:35:37
Create Date : 2007:03:25 18:35:37
Modify Date : 2007:03:25 18:35:37
File Modification Date/Time : 2007:03:25 19:35:37
======== 2007-03-25_D50_DSC_4515.NEF
Date/Time Original : 2007:03:25 18:35:59
Create Date : 2007:03:25 18:35:59
Modify Date : 2007:03:25 18:35:59
File Modification Date/Time : 2007:03:25 19:35:59
3 image files read
D:\Photos\Library\2007\03\25>exiftool "-filemodifydate<createdate" *
3 image files updated
D:\Photos\Library\2007\03\25>exiftool -alldates -filemodifydate *
======== 2007-03-25_D50_DSC_4513.NEF
Date/Time Original : 2007:03:25 18:35:16
Create Date : 2007:03:25 18:35:16
Modify Date : 2007:03:25 18:35:16
File Modification Date/Time : 2007:03:25 18:35:16
======== 2007-03-25_D50_DSC_4514.NEF
Date/Time Original : 2007:03:25 18:35:37
Create Date : 2007:03:25 18:35:37
Modify Date : 2007:03:25 18:35:37
File Modification Date/Time : 2007:03:25 18:35:37
======== 2007-03-25_D50_DSC_4515.NEF
Date/Time Original : 2007:03:25 18:35:59
Create Date : 2007:03:25 18:35:59
Modify Date : 2007:03:25 18:35:59
File Modification Date/Time : 2007:03:25 18:35:59
3 image files read
D:\Photos\Library\2007\03\25>exiftool -filemodifydate-=1 *
3 image files updated
D:\Photos\Library\2007\03\25>exiftool -alldates -filemodifydate *
======== 2007-03-25_D50_DSC_4513.NEF
Date/Time Original : 2007:03:25 18:35:16
Create Date : 2007:03:25 18:35:16
Modify Date : 2007:03:25 18:35:16
File Modification Date/Time : 2007:03:25 17:35:16
======== 2007-03-25_D50_DSC_4514.NEF
Date/Time Original : 2007:03:25 18:35:37
Create Date : 2007:03:25 18:35:37
Modify Date : 2007:03:25 18:35:37
File Modification Date/Time : 2007:03:25 17:35:37
======== 2007-03-25_D50_DSC_4515.NEF
Date/Time Original : 2007:03:25 18:35:59
Create Date : 2007:03:25 18:35:59
Modify Date : 2007:03:25 18:35:59
File Modification Date/Time : 2007:03:25 17:35:59
3 image files read
D:\Photos\Library\2007\03\25>exiftool -filemodifydate+=1 *
3 image files updated
D:\Photos\Library\2007\03\25>exiftool -alldates -filemodifydate *
======== 2007-03-25_D50_DSC_4513.NEF
Date/Time Original : 2007:03:25 18:35:16
Create Date : 2007:03:25 18:35:16
Modify Date : 2007:03:25 18:35:16
File Modification Date/Time : 2007:03:25 18:35:16
======== 2007-03-25_D50_DSC_4514.NEF
Date/Time Original : 2007:03:25 18:35:37
Create Date : 2007:03:25 18:35:37
Modify Date : 2007:03:25 18:35:37
File Modification Date/Time : 2007:03:25 18:35:37
======== 2007-03-25_D50_DSC_4515.NEF
Date/Time Original : 2007:03:25 18:35:59
Create Date : 2007:03:25 18:35:59
Modify Date : 2007:03:25 18:35:59
File Modification Date/Time : 2007:03:25 18:35:59
3 image files read
D:\Photos\Library\2007\03\25>
Title: Re: Problem Setting FileModifyDate
Post by: Archive on May 12, 2010, 08:54:23 AM
Post by: Archive on May 12, 2010, 08:54:23 AM
[Originally posted by exiftool on 2008-07-19 09:57:56-07]
Hi Justin,
Thanks for testing this. Please let me know if you have any problems.
I think I have come up with a solution for the module loading problem
that won't slow things down, but I have to test it out. If it works,
version 7.39 will use this technique. Until then, I have made the
7.38 Windows version public for other people to test out.
- Phil
Hi Justin,
Thanks for testing this. Please let me know if you have any problems.
I think I have come up with a solution for the module loading problem
that won't slow things down, but I have to test it out. If it works,
version 7.39 will use this technique. Until then, I have made the
7.38 Windows version public for other people to test out.
- Phil
Title: Re: Problem Setting FileModifyDate
Post by: Archive on May 12, 2010, 08:54:24 AM
Post by: Archive on May 12, 2010, 08:54:24 AM
[Originally posted by red4 on 2008-08-13 20:30:33-07]
Code:
I've got the same problem really, trying to put an EXIF date tag into some photos that don't
have any.
exiftool appears to be showing local timezone shifted times.
Perl 5.10.0.1003 and exiftool 7.39
Trying to execute this "exiftool.pl "-DateTimeOriginal<filemodifydate" Image025.jpg"
Which does indeed work, but records an offset time in the resulting file.
have any.
exiftool appears to be showing local timezone shifted times.
Perl 5.10.0.1003 and exiftool 7.39
Trying to execute this "exiftool.pl "-DateTimeOriginal<filemodifydate" Image025.jpg"
Which does indeed work, but records an offset time in the resulting file.
Title: Re: Problem Setting FileModifyDate
Post by: Archive on May 12, 2010, 08:54:24 AM
Post by: Archive on May 12, 2010, 08:54:24 AM
[Originally posted by exiftool on 2008-08-15 12:21:36-07]
So it looks like 5.10 didn't solve all the problems.
Red4: what is your time zone? Is the problem the same for exiftool 7.37?
Does the problem go away if you turn off "Automatically adjust clock
for daylight savings time" in your Date and Time settings?
Thanks for any help you can provide.
- Phil
So it looks like 5.10 didn't solve all the problems.
Red4: what is your time zone? Is the problem the same for exiftool 7.37?
Does the problem go away if you turn off "Automatically adjust clock
for daylight savings time" in your Date and Time settings?
Thanks for any help you can provide.
- Phil
Title: Re: Problem Setting FileModifyDate
Post by: Archive on May 12, 2010, 08:54:24 AM
Post by: Archive on May 12, 2010, 08:54:24 AM
[Originally posted by red4 on 2008-08-15 19:49:49-07]
Code:
Quick answer: turning off "Automatically adjust clock for Daylight Savint Time" in Vista fixes all
the time problems that I've been seeing for the last few days!
OK, I've been experimenting for a while, I think exiftool is working fine on 5.10. I was
initially running Perl 5.8 but had problems so switched to 5.10 and I think I've tracked down
the culprit to be Windows Vista! Sorry Phil!
Because I ended up chasing my tail for a bit, I decided to take four test photos with known times
on my camera and see what ended up. My camera also has a Daylight Saving time setting, which I
believe is superfluous to this, but just wanted to make sure I controlled all the variables.
So I set the cameras clock to 2030 each time and once in summer and once in winter; repeated for
Daylight saving time for completeness. Notice how Vista shifts the time by an hour in winter time!
The other peculiar effect I've discovered, is that Vista also shifts the File Modification
Date/Time by an hour if the file is copied from the camera during winter time (or when Vistas
local clock is set to winter time).
Is the solution to leave "Automatically adjust clock for Daylight Savint Time" turned off and
manually change Vista's clock twice a year? Such a pain!!
IMG_1166.JPG:
============
Set on camera: 15.08.2008 2030 Daylight saving time ON
exiftool.pl:
File Modification Date/Time : 2008:08:15 20:30:12
Date/Time Original : 2008:08:15 20:30:13
Create Date : 2008:08:15 20:30:13
Modify Date : 2008:08:15 20:30:13
Photoshop: exif:DateTimeOriginal: 2008-08-15T20:30:13+01:00
Vista Date Taken: 15/08/2008 20:30
IMG_1167.JPG:
============
Set on camera: 15.11.2008 2030 Daylight saving time ON
exiftool.pl:
File Modification Date/Time : 2008:11:15 20:30:04
Date/Time Original : 2008:11:15 20:30:05
Create Date : 2008:11:15 20:30:05
Modify Date : 2008:11:15 20:30:05
Photoshop: exif:DateTimeOriginal: 2008-11-15T20:30:05Z
Vista Date Taken: 15/11/2008 21:30
IMG_1168.JPG:
============
Set on camera: 15.08.2008 2030 Daylight saving time OFF
exiftool.pl:
File Modification Date/Time : 2008:08:15 20:30:04
Date/Time Original : 2008:08:15 20:30:05
Create Date : 2008:08:15 20:30:05
Modify Date : 2008:08:15 20:30:05
Photoshop: exif:DateTimeOriginal: 2008-08-15T20:30:05+01:00
Vista Date Taken: 15/08/2008 20:30
IMG_1169.JPG:
============
Set on camera: 15.11.2008 2030 Daylight saving time OFF
exiftool.pl:
File Modification Date/Time : 2008:11:15 20:30:04
Date/Time Original : 2008:11:15 20:30:04
Create Date : 2008:11:15 20:30:04
Modify Date : 2008:11:15 20:30:04
Photoshop: exif:DateTimeOriginal: 2008-11-15T20:30:04Z
Vista Date Taken: 15/11/2008 21:30
the time problems that I've been seeing for the last few days!
OK, I've been experimenting for a while, I think exiftool is working fine on 5.10. I was
initially running Perl 5.8 but had problems so switched to 5.10 and I think I've tracked down
the culprit to be Windows Vista! Sorry Phil!
Because I ended up chasing my tail for a bit, I decided to take four test photos with known times
on my camera and see what ended up. My camera also has a Daylight Saving time setting, which I
believe is superfluous to this, but just wanted to make sure I controlled all the variables.
So I set the cameras clock to 2030 each time and once in summer and once in winter; repeated for
Daylight saving time for completeness. Notice how Vista shifts the time by an hour in winter time!
The other peculiar effect I've discovered, is that Vista also shifts the File Modification
Date/Time by an hour if the file is copied from the camera during winter time (or when Vistas
local clock is set to winter time).
Is the solution to leave "Automatically adjust clock for Daylight Savint Time" turned off and
manually change Vista's clock twice a year? Such a pain!!
IMG_1166.JPG:
============
Set on camera: 15.08.2008 2030 Daylight saving time ON
exiftool.pl:
File Modification Date/Time : 2008:08:15 20:30:12
Date/Time Original : 2008:08:15 20:30:13
Create Date : 2008:08:15 20:30:13
Modify Date : 2008:08:15 20:30:13
Photoshop: exif:DateTimeOriginal: 2008-08-15T20:30:13+01:00
Vista Date Taken: 15/08/2008 20:30
IMG_1167.JPG:
============
Set on camera: 15.11.2008 2030 Daylight saving time ON
exiftool.pl:
File Modification Date/Time : 2008:11:15 20:30:04
Date/Time Original : 2008:11:15 20:30:05
Create Date : 2008:11:15 20:30:05
Modify Date : 2008:11:15 20:30:05
Photoshop: exif:DateTimeOriginal: 2008-11-15T20:30:05Z
Vista Date Taken: 15/11/2008 21:30
IMG_1168.JPG:
============
Set on camera: 15.08.2008 2030 Daylight saving time OFF
exiftool.pl:
File Modification Date/Time : 2008:08:15 20:30:04
Date/Time Original : 2008:08:15 20:30:05
Create Date : 2008:08:15 20:30:05
Modify Date : 2008:08:15 20:30:05
Photoshop: exif:DateTimeOriginal: 2008-08-15T20:30:05+01:00
Vista Date Taken: 15/08/2008 20:30
IMG_1169.JPG:
============
Set on camera: 15.11.2008 2030 Daylight saving time OFF
exiftool.pl:
File Modification Date/Time : 2008:11:15 20:30:04
Date/Time Original : 2008:11:15 20:30:04
Create Date : 2008:11:15 20:30:04
Modify Date : 2008:11:15 20:30:04
Photoshop: exif:DateTimeOriginal: 2008-11-15T20:30:04Z
Vista Date Taken: 15/11/2008 21:30
Title: Re: Problem Setting FileModifyDate
Post by: Archive on May 12, 2010, 08:54:24 AM
Post by: Archive on May 12, 2010, 08:54:24 AM
[Originally posted by exiftool on 2008-08-17 14:17:18-07]
Thanks for looking into this. It would be nice if
there were a more convenient solution.
- Phil
Thanks for looking into this. It would be nice if
there were a more convenient solution.
- Phil
Title: Re: Problem Setting FileModifyDate
Post by: Archive on May 12, 2010, 08:54:24 AM
Post by: Archive on May 12, 2010, 08:54:24 AM
[Originally posted by exiftool on 2008-08-26 10:49:01-07]
I think I have found the solution, and will revert the Windows version
of exiftool 7.41 to use Perl 5.8 once again. In this version (to be
released within a few days), I will add a Windows-specific patch that
should fix the timezone problem.
- Phil
I think I have found the solution, and will revert the Windows version
of exiftool 7.41 to use Perl 5.8 once again. In this version (to be
released within a few days), I will add a Windows-specific patch that
should fix the timezone problem.
- Phil