exiftool not updating FileModifyDate with CreationDateValue on MP4 files

[mvexif]

I am running into a problem with exiftool not updating FileModifyDate with CreationDateValue on MP4 files:

exiftool -config $CONFIG '-FileModifyDate<CreationDateValue' -ext MP4 ./

example (note how FileModifyDate is still different from CreationDateValue):

Code Select Expand


vmbp:20150903_KALIMNOS mve$ exiftool -config $CONFIG '-FileModifyDate<CreationDateValue' -ext MP4 ./
    1 directories scanned
    2 image files updated
vmbp:20150903_KALIMNOS mve$  exiftool -php 20150904_011855_RX100M3_C0015.MP4 | egrep "CreationDateValue|FileModifyDate"
  "FileModifyDate" => "2015:09:04 01:18:55+03:00",
  "CreationDateValue" => "2015:09:03 15:18:55-07:00",


[StarGeek]

It looks like a time zone difference to me.  Is the computer you are using currently in a +3 timezone?  If so, then the number is correct.   The difference between the time stamps is 10 hours, which is the difference between the time zones.  It's the same time, just different time zones.

[mvexif]

good catch - you are right!  Thank you!