The example above changes only the DateTimeOriginal tag, but any writable date or time tag can be shifted, and multiple tags may be written with a single command line. For convenience, a Shortcut tag called AllDates has been defined to represent these three tags. So, for example, if you forgot to set your camera clock back 1 hour at the end of daylight savings time in the fall, you can fix the images with:.
See Image::ExifTool::Shift. Or a new directory can be specified by setting the value of the Directory tag. There is a significant overhead in loading ExifTool, so performance may be greatly improved by taking advantage of ExifTool's batch processing capabilities the ability to process multiple files or entire directories with a single command to reduce the number of executed commands when performing complex operations or processing multiple files.
It has also been observed that the loading time of ExifTool for Windows increases significantly when Windows Defender is active. Disabling Windows Defender may speed things up significantly.
The processing speed of ExifTool can be improved when extracting information by reducing the amount of work that it must do. Decrease the number of extracted tags by specifying them individually -TAG or by group -GROUP:all , and disable the composite tags -e and the print conversions -n if these features aren't required.
Note that the exclude options -x or --TAG are not very efficient, and may have a negative impact on performance if a large number of tags are excluded individually. The exception is XMP groups, which are bypassed in processing so they are never even extracted -- specifying --XMP-crs:all and -XMP-crd:all may speed processing significantly by avoiding processing of bulky Adobe image-editing information.
The -fast option can significantly increase speed when extracting information from JPEG images which are piped across a slow network connection. However, with this option any information in a JPEG trailer is not extracted. For more substantial speed benefits, -fast2 may be used to also avoid extracting MakerNote information if this is not required, or -fast4 if only pseudo System tags are required.
When writing, avoid copying tags with -tagsFromFile or using the -if or -fileOrder option because these will add the extra step of extracting tags from the file. Without these the write operation is accomplished with a single pass of each file. The " exiftool " script provides a command-line interface to the Image::ExifTool Perl library module which is part of the ExifTool distribution.
The Image::ExifTool module can be used in any Perl script to provide easy access to meta information. Here is an example of a very simple script that uses Image::ExifTool to print out all recognized meta information in a file:.
The simple script above does not handle this case. There is still much unknown information in the maker notes for many camera models. To see this information, run exiftool with the -U option.
In this area, ExifTool is very much a collaborative effort, and development relies heavily on the input from camera owners to help decode new meta information. If you manage to figure out what any of it means, send me an e-mail philharvey66 at gmail. Many thanks to all who have helped so far ExifTool is free, but due to popular request I am providing a way for those who feel the need to send me some money. It is really not necessary, but thank you very much if you decide to make a contribution:.
Your generous donations have provided the funds used to register exiftool. If you have any comments, suggestions or questions, please post to the ExifTool Forum so other people may benefit from your experiences.
I check the forum at least as often as my email. Otherwise, if you must contact me directly, my e-mail address is on the first line of the README file in the full distribution. Download Version Windows Executable: exiftool R Jpeg Photoshop 3. R Real ID3 Lyrics3. ID-xxx where xxx is the tag ID. I've reset it But yet nothing. When I first got it the directions to set it up are a joke. But there is NO help for this system. I have now been broken into and of course when I go back to look there is nothing for me to view.
If I could I've negative numbers. I would be say The developer, zhu bo , has not provided details about its privacy practices and handling of data to Apple. The developer will be required to provide privacy details when they submit their next app update.
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