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How to mass resize animated GIFs?


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#1 meepingcomputer

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Posted 21 January 2017 - 05:13 PM

I have a folder full of just over 1000 animated GIFs and I want to visually shrink them all by 25%. I need them to remain animated after the size change. What software or website can I use to do this?

 

Thanks.



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#2 britechguy

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Posted 22 January 2017 - 06:16 PM

I have never tried it with animated GIFs, but Bulk Image Manager works beautifully on non-animated images.  Since it costs nothing, and takes only minutes to install, you could certainly try it with copies of a few of the GIFs you need to resize and see if it works.

 

See also:  http://www.ilovefreesoftware.com/04/featured/5-best-bulk-image-resizer-batch-image-resize.html 

 

I have not used Fast Stone's resizer but I have Fast Stone Image Viewer (which is way more than just a viewer) as my default image handling program.


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#3 britechguy

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Posted 22 January 2017 - 08:08 PM

You got me really curious about this, and after Bulk Image Manager didn't work I did some more digging.

 

Download and install Gifsicle.  In the folder where all your GIFs that need to be resized are located, create a folder named "Resized."  See also this page on using Gifsicle on the command line.

 

You would need to use the following command in a Command Prompt window after you've navigated to the folder that contains the GIFs you want to resize:  

 

                for %F in (*.gif) do gifsicle --scale 0.75 -i %F > .\Resized\%F

 

That would, for each gif file in the folder, run the gifsicle program scaling the animated gif to 75% of its original size and place the end result in the Resized folder under the same name.  If you wanted to change the name slightly you could use ".\Resized\SM_%F" in the for command instead of just reusing the original file name, then all the resized files would start with the characters "SM_".

 

When I have bulk file processing to do, and there doesn't exist a bulk file processor that runs from a dialog, then I either use Command Prompt directly if I've got a single line command like the for to do the grunt work, or create a batch file, but that's really unnecessary here.


Brian AKA Bri the Tech Guy (website in my user profile) - Windows 10 Home, 64-Bit, Version 1803, Build 17134 

 

     In a modern society where everyone thinks their opinion deserves to be heard nothing annoys me more than individuals who mistake their personal preferences for fact.

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#4 meepingcomputer

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Posted 24 January 2017 - 11:44 AM

Thank you very much!



#5 britechguy

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Posted 24 January 2017 - 12:07 PM

You're quite welcome.

 

I don't like the way I phrased one thing in the above instructions.  What follows presumes you've already downloaded gifsicle and have unzipped it to a folder.  It doesn't install in the registry but is a stand-alone program.

 

First you open command prompt.  Then you navigate within command prompt to the folder with the files.  Then, if you haven't done so already using file explorer, you create the folder where you plan to place the resized animated GIFS.  Finally you run the for command.  If you placed gifsicle somewhere random you may need to specify the full path to it in the do part, e.g., C:\gifsicle-dir\gifsicle    The rest of the line following gifsicle would remain the same.


Brian AKA Bri the Tech Guy (website in my user profile) - Windows 10 Home, 64-Bit, Version 1803, Build 17134 

 

     In a modern society where everyone thinks their opinion deserves to be heard nothing annoys me more than individuals who mistake their personal preferences for fact.

         ~ Commenter TheCruyffGurn on the The Guardian website, 8/13/2014

 

              

 





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