From dcfb172704f3afb68a30425029ec834be2883274 Mon Sep 17 00:00:00 2001 From: bt Date: Sat, 8 Jun 2024 13:22:19 -0400 Subject: More content porting, on-going markdown changes for lowdown support --- build/batch-webp-conversion/index.html | 104 ++++++++++++++++++++------------- 1 file changed, 63 insertions(+), 41 deletions(-) (limited to 'build/batch-webp-conversion') diff --git a/build/batch-webp-conversion/index.html b/build/batch-webp-conversion/index.html index a9ce6e2..839973d 100644 --- a/build/batch-webp-conversion/index.html +++ b/build/batch-webp-conversion/index.html @@ -1,68 +1,90 @@ - + Batch Converting Images to webp with macOS Automator - - + + +
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Batch Converting Images to webp with macOS Automator

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Batch Converting Images to webp with macOS Automator

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2021-10-15

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A great deal of my time working as a web/UI designer is spent exporting and/or converting images for software products and websites. Although a lot of modern applications can render image conversions at build time, a custom conversion is sometimes requested for an image to be set as webp.

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You could download one of the many native apps from the Mac App Store to do this for you - but why not create your own script and run it with a simple right-click directly inside Finder? Let's do just that!

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Basic requirements

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A great deal of my time working as a web/UI designer is spent exporting and/or converting images for software products and websites. Although a lot of modern applications can render image conversions at build time, a custom conversion is sometimes requested for an image to be set as webp.

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You could download one of the many native apps from the Mac App Store to do this for you - but why not create your own script and run it with a simple right-click directly inside Finder? Let’s do just that!

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Basic requirements

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Important!: As of this time of writing, the official libwebp package release is libwebp-1.2.1-mac-10.15. If this has been updated since then, change the command below to match that of the proper release version.

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1) First you will need to download the libwebp package to your Downloads folder: developers.google.com/speed/webp/download - - Look for the "Download for macOS link"

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2) Next we will need to copy the cwebp folder to our /usr/local/bin directory: - - Open macOS Terminal - - Run sudo cp /Downloads/libwebp-1.2.1-mac-10.15/bin/cwebp /usr/local/bin - - Note: if the /usr/local/bin directory doesn't exist, simply create it by running: sudo cd /usr/local && mkdir bin

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Creating our custom Automator script

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1) Open the macOS Automator from the Applications folder

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2) Select Quick Option from the first prompt

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3) Set "Workflow receives current" to image files

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4) Set the label "in" to Finder

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5) From the left pane, select "Library > Utilities"

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6) From the presented choices in the next pane, drag and drop Run Shell Script into the far right pane

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7) Set the area "Pass input" to as arguments

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8) Enter the following code below as your script and type ⌘-S to save (name it something like "Convert to webp")

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for f in "$@"
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  1. First you will need to download the libwebp package to your Downloads folder: developers.google.com/speed/webp/download 
    
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    • Look for the “Download for macOS link”
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    2. 
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  2. Next we will need to copy the cwebp folder to our /usr/local/bin directory:
    
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    • Open macOS Terminal
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    • Run sudo cp /Downloads/libwebp-1.2.1-mac-10.15/bin/cwebp /usr/local/bin
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    • Note: if the /usr/local/bin directory doesn’t exist, simply create it by running: sudo cd /usr/local && mkdir bin
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    3. 
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Creating our custom Automator script

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  1. Open the macOS Automator from the Applications folder
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  2. Select Quick Option from the first prompt
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  3. Set “Workflow receives current” to image files
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  4. Set the label “in” to Finder
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  5. From the left pane, select “Library > Utilities”
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  6. From the presented choices in the next pane, drag and drop Run Shell Script into the far right pane
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  7. Set the area “Pass input” to as arguments
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  8. Enter the following code below as your script and type ⌘-S to save (name it something like “Convert to webp”)
    
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    for f in “$@”
 do
-/usr/local/bin/cwebp -q 85 "$f" -o "${f%.*}.webp"
-done
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+/usr/local/bin/cwebp -q 85 “$f” -o “${f%.*}.webp” +done

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For visual reference, it should look something like this:

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-macOS Automator -
(link to hi-res image)
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And when right-clicking an image file in the Finder window, it should now give you the option to convert:

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-Right click to convert -
(link to hi-res image)
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Making edits to your script

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If you ever have the need to edit this script (for example, changing the default 85 quality parameter), you will need to navigate to your ~/Library/Services folder and open your custom webp Quick Action in the Automator application.

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Making edits to your script

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If you ever have the need to edit this script (for example, changing the default 85 quality parameter), you will need to navigate to your ~/Library/Services folder and open your custom webp Quick Action in the Automator application.

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Simple as that!

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Possible Hiccups

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Possible Hiccups

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I was contacted by the very helpful Kev Quirk about a minor problem he encountered while following this tutorial. When trying to run cwebp he received the following error message:

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cwebp cannot be opened because it's from an unverified developer
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cwebp cannot be opened because it's from an unverified developer
 

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Doing the next steps seemed to have fixed this issue for him:

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  1. Click on the "Open in Finder" in the error message prompt
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  2. Click on the “Open in Finder” in the error message prompt
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  3. Double-click on the cwebp utility to open in Terminal
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  4. You'll then be prompted with a pop-up asking if you wish to execute
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  5. You’ll then be prompted with a pop-up asking if you wish to execute
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After following these steps, the issue should be resolved.