You also need to be careful with MakerNotes.
EXIFTOOL MANUAL PDF
Thus, ExifTool alone cannot be used to safely edit metadata in PDF files.
EXIFTOOL MANUAL UPDATE
Changes to PDF files using ExifTool are reversible (by removing the update with “ -PDF-update:all=”), since the original information is never removed from the file. Please be aware that some files do not allow you to completely remove meta information from them. And the ExifTool program supports almost all possible tag groups.
This is because Exiv2 only supports three groups of tags: Exif, IPTC, and XMP. Let's count how many lines exiv2 outputs: Sometimes meta information cannot be removed completely Programs display only the meta information they support. These are the tags that I found in the first photo I came across. Note: these are not all possible tags and duplicates.
is not really meta information, it is file properties.Įxamples of tags that allow you to determine the type and model of a device:
EXIFTOOL MANUAL SOFTWARE
Also in this group there are tags Model and Software – the last tag contains the name of the phone's firmware and allows you to uniquely identify the model, like the first tag, which contains the name of the model. For example, the Exif group contains DateTime, DateTimeOriginal, and DateTimeDigitized tags - all associated with creation time. Moreover, one group may contain tags with similar functions. It is important to know that the same information can be duplicated in different tags belonging to a different group. You can add the -e option to not display composite (fake, generated for convenience) tags: As well, you can use exiftool to show tag group if you specify the -G option. You can see which group the meta-information tag belongs to using exiv2 programs (with the “ -p a” option, as shown above, the name of the group comes first, and then the name of the subgroup does, and then the tag itself). There are many groups of tags, the most popular for. But there are dozens of tag groups (not tags, but GROUPS) – the ExifTool documentation lists the tag groups that this program supports, estimate their quantity.ĮxifTool has extensive documentation on tags with their correct names, to see it run the command: This method sounds simple, but it is NOT ideal because exiv2 only supports three groups of tags: Exif, IPTC, and XMP. The tag name from this output can also be used for ExifTool – you need to take the part of the name after the last period. The correct tag name can be viewed using the Exiv2 program if you run it with the " -p a" option: Instead, they usually display data in a user-friendly manner, sometimes even translating into the user's language. Metadata programs usually do not display the correct tag names.
To manipulate meta information tags (delete, change, show, exclude selected tags), you need to know their name.
If you decide not just to delete meta information, but to manipulate it, then you need to know more details in order not to get into a loophole due to the fact that you forgot about the tag with duplicate data, as a result of which the meta information will become inconsistent or just give out real data. The first two numbers after which are separated by commas, are latitude and longitude. Then look at the address bar of your web browser, it will be something like: 14.9684368,98.6656482,10.75z This can be done by opening the map ( ), then find the place you need and adjust the view so that it is in the center, if necessary, zoom in.
EXIFTOOL MANUAL HOW TO
How to find out the coordinates of any placeįor GPS spoofing, you need to know which geographic coordinates the desired location has. The file has been archived so that you can also estimate the date of modification.Īfter reading this manual, you can make fun of those who like to check metadata, as well as services that automatically indicate the location of the shooting (Instagram, Twitter). Use geolocation services to compare how the location they show differs from the image in the photo. Namely, look at the coordinates, shooting date, camera, notes. Take a look at the metadata of this image: How to build motion tracks based on a group of photos
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