And some of those tags may be only in the MakerNotes, so you would have to copy the entire Makernotes To correctly "copy" Aperture and ShutterSpeed, you have to copy the above tags that they're based upon. ShutterSpeed is based upon ExposureTime, ShutterSpeedValue, and/or BulbDuration. Aperture is based upon either FNumber or ApertureValue, depending upon which is actually in the file.
You have to copy the tags that they're based upon. You can't copy them to another file because individually, they don't exist. Aperture and ShutterSpeed are two examples. They are derived from multiple other tags. You may not have been trying to copy the Quality tag, but this point becomes relevant when it comes to Composite tags.Ĭomposite tags aren't tags that are in the file. It has to be copied as a block with -MakerNotes. In the case of Makernotes tags, they cannot be copied or created individually. In the case of FileSize, you obviously can't arbitrarily change the size of the destination file, thus the filesize is not writable error. Many of that tags covered by that shortcut are either filesystem tags ( FileSize), MakerNotes tags ( Quality), or Composite tags ( Aperture, ShutterSpeed). MaxProcs set to a quarter the number of CPUs on the current system (minimallyġ) no more than maxProcs instances of exiftool will be spawned.The Common shortcut tag is more of a data collection tag and it really isn't meant for copying info from one file to another (see Shortcut tags for list of tags is contains). To avoid overwhelming your system, the exiftool singleton is configured with a Instance of ExifTool across many requests, dropping response latencyĭramatically as well as reducing system load.
Using ExifTool's -stay_open batch mode means we can reuse a single SSD can process 20+ files per second per thread, or 500+ files per second when Hierarchy of sample images and videos, and parses the results.Įxiftool-vendored v16.0.0 on a 2019 AMD Ryzen 3900X running Ubuntu 20.04 on an path/to/examples target reads all tags found in a directory On a performant linux box, a smaller value of streamFlushMillis may work as The default exiftool singleton is intentionally throttled. stringify ( tags ) // parseJSON doesn't validate the input, so we don't assert that it's a Tags // instance, but you can cast it (unsafely.) const tags2: Tags = parseJSON ( str ) as Tags Performance readTags ( "/path/to/file.jpg" ) const str: string = JSON. ExifTool const exiftool = new ExifTool ( from "exiftool-vendored" const tags: Tags = await exiftool. end()Ĭonst ExifTool = require ( "exiftool-vendored" ).
Note that if you don't use the default singleton, you don't need to. Those defaults have been used to create the There are many configuration options to ExifTool, but all values have (more or
Validating your own systems, but don't be surprised when everything still works.
#Exiftool specific tags upgrade#
When you upgrade to a new major version, please take a bit more care in I think it's better to be pessimistic in codeĬhange impact analysis: "over-promise and under-deliver" your breaking-code
#Exiftool specific tags Patch#
I've been bit too many times by my code breaking when I pull in minor or patch I bump the major version if there's a chance existing code might be Upgradingįor breaking changes since you last updated.
#Exiftool specific tags apk#
If you're installing on a minimal Linux distribution, likeĪlpine, you may need to install perl (à la " apk add perl"). You shouldn't include either the exiftool-vendored.exe orĮ as direct dependencies to your project. Note that exiftool-vendored provides an installation of ExifTool relevant Robust test coverage, performed with on macOS, Linux, and Robust type definitions of the top 99.5% tags used by over 6,000ĭifferent camera makes and models (see an example)Īutomated updates to ExifTool ( as new versions come out
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