![]() ![]() If any of the text not shown as bold or italic is changed, the command will not work as expected, so use caution to avoid unintentional changes. Of note, metadata fields can vary between file types, so if you use this command for anything besides tif or jpeg, you may need to customize the text shown in italics. PC directions should be similar, but I have not personally tested on that platform. If you copy-paste everything through the end of ".txt" you can simply insert a space, then drag and drop the folder you want from Finder into the Terminal window and it will auto-populate the file path. Copy paste the command, with any BOLD text switched to meet your needs. To use the command above in a Mac where ExifTool has been installed, open terminal and navigate to the directory where you want the. The file name and directory ensure I know where to find any problematic files. ![]() By using a filter to check the file size, I can quickly see whether any values are surprisingly small or null, which can indicate a corrupt file. The metadata fields I selected above allow me to quickly use filter tools to check whether there are any variations in resolution, bit depth, and color profile settings to ensure they are correct. This text file will be written to whatever directory the command is run from. The information in several metadata fields (specified here in italics) will be pulled for each file it finds and written to a single tab-delimited text file that can then be opened and investigated in a spreadsheet program, such as Excel. This command will carry out what is called a recursive action, where I can point it to a top level folder with many subfolders and it will automatically search all subfolders for the type of file I've specified (tif, in the example). The creator of ExifTool is active on the forum, and helped me troubleshoot the creation of my favorite command:Įxiftool -T -r -ext tif -FileName -XResolution -BitsPerSample -FileSize -ProfileDescription -Directory -w+ %0f. The Forum is a good place to go for help, as others will be quick to help you write a command if you get lost on the documentation. However, with basic command line familiarity, having an array of pre-set commands to copy-paste into Terminal or Command Prompt will be all you need to work with ExifTool. The documentation can also be frustrating, as it is dense, not always organized in the best way, and full of jargon. On the other hand, using the -alpha remove technique will still produce multiple images, each one having transparency removed.ExifTool is lightweight and powerful, but unfortunately not very intuitive. generating thumbnails from a PDF file, -flatten will not do what you want (it will flatten all images for all pages into one image). So, if you are converting several images at once, e.g. However this will not work with "mogrify" or with a sequence of multiple images, basically because the "-flatten" operator is really designed to merge multiple images into a single image. Included in that section is mention of an important caveat to the usage of -flatten as a technique for removing transparency: There are more details on other, often-used techniques for removing transparency described in the Removing Transparency from Images section. Thus, if you do not need the alpha channel you can make your output image size smaller by adding the -alpha off option, e.g: convert in.png -background white -alpha remove -alpha off out.png If you no longer need the alpha channel you can then use Alpha Off to disable it. Note that while transparency is 'removed' the alpha channel will remain turned on, but will now be fully-opaque. It is thus the prefered way of removing image transparency. This operation is simple and fast, and does the job without needing any extra memory use, or other side effects that may be associated with alternative transparency removal techniques. using the -background color of your choosing. The Alpha Remove section of the ImageMagick Usage Guide suggests using the -alpha remove option, e.g.: convert in.png -background white -alpha remove out.png ![]()
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