3/26/2023 0 Comments Exiftool tag names![]() ![]() ByID() family of wrapper methods that translate ID to names, ensure a group is specified, append :ID- to the group name, and then invoke standard methods such as SetNewValue(). You can typically filter tags by combining group and family names into a single command. Each individual bit of metadata information has a tag name the tag name. ![]() Both ways, I'm making assumptions about ExifTool internals: after all, tag names may change just as much as GetTagTable().įor this reason, I'm writing an Image::ExifTool::ByID module with a. Exiftool is a mature and reliable metadata reading and writing application. What I can do now is either hard-code a table from IDs to names, or look up a table from GetTagTable() on the fly. Tag names are used to indicate the specific. Ideally, I wish I could do without tag names, as I already have all the IDs. This document contains a complete list of ExifTool tag names, organized into tables based on information type. In other words, family 7 group names can disambiguate a tag, but can't specify a tag. These offsets may have a decimal part which is used only to differentiate tags with values stored at the same position. Index refers to the offset of a value when found at a fixed position within a data block ( is the multiplier for calculating a byte offset: 1, 2, 4 or 8). A Tag ID is the computer-readable equivalent of a tag name, and is the identifier that is actually stored in the file. This option is mainly used for extracting embedded images or other binary data, but it may also be useful for some text strings since control characters (such as newlines) are not replaced by '.' as they are in the default output. Tag ID, Index or Sequence is given in the first column of each table. well, group names and so, an external app that only knows what IDs a file format uses, still needs to find out somehow what tag name an ID corresponds to according to Image::ExifTool, in order to be able use family 7 group names at all. Use -b: exiftool -b -make x.jpg From the man page:-b (-binary) Output requested metadata in binary format without tag names or descriptions. Although the family 7 group names approach is working - thanks for that - family 7 group names are. (Not that I recommend accessing ExifTool internals like this, but this is not likely to change.) Mandatory tags (indicated by a colon after the Writable type) may be added automatically with default values when creating a new IFD, and the IFD is removed. ![]() When writing EXIF information, the default Group listed below is used unless another group is specified. Quote from: Phil Harvey on August 03, 2020, 09:44:23 PM The names of these IFD's correspond to the ExifTool family 1 group names. ![]()
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