Extract metadata using specific keywordsĮxifTool is developed by Phil Harvey.Extract the Specific Meta-Data Information.Extract the Common Meta-Data Information.
EXIF is an acronym for Exchangeable Image File Format and it is a standard for the inclusion of metadata in certain file types. In order to achieve this, we’ll be using a tool known as “ExifTool”.
Theĭates are specified as yyyy:mm:dd.In this article, we’ll discover various methods to read, write and manipulate the meta-data information recorded in a variety of file types. Including leap years and daylight savings time changes.
Out exactly how many days the timestamp needs to be adjusted by, The time offset is thus speci-įied as a difference between two dates, so that jhead can figure Incorrectly, such as having date and time reset by batteryīecause different months and years have different numbers ofĭays in them, a simple offset for months, days, years would lead Used when fixing dates from cameras where the date was set Works like -ta, but for specifying large date offsets, to be Including "DateTimeOriginal" (tag 0x9003) and "DateTimeDigi. This option changes all Date/time fields in the exif header, Or when daylight savings time has changed. Set on the camera, such as after travelling across time zones, Useful when having taken pictures with the wrong time If you happen to have the wrong-set camera still at hand and still wrong, I find it handy to take a shot of a (time-synced) digital clock - then, take the date shown in the picture as "newdate" and the date in the metadata as "olddate" for the parameters below.Īdjust time stored in the Exif header by h:mm backwards or for. It has a simple adjust by-hours command, but for big changes it also has an old -> new syntax which computes the difference for you (so you don't have to worry about leap years and so on). You have to format the dates correctly, but it's easy to do by following the examples (see the documentation I've included below). If you're not used to command-line programs, this is a pretty non-intimidating one because there's not a lot to it. It's completely free (and open source) and is easily available for Windows, Mac, or Linux. The simple command-line program jhead is great for this.
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