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authorBradley Taunt <bt@btxx.org>2024-06-06 08:05:12 -0400
committerBradley Taunt <bt@btxx.org>2024-06-06 08:05:12 -0400
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+ <title>Batch Converting Images to webp with macOS Automator</title>
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+<h1>Batch Converting Images to webp with macOS Automator</h1>
+<p>2021-10-15</p>
+<p>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 <code>webp</code>.</p>
+<p>You <em>could</em> 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? <strong>Let's do just that!</strong></p>
+<h2>Basic requirements</h2>
+<p><strong>Important!</strong>: As of this time of writing, the official <code>libwebp</code> package release is <em>libwebp-1.2.1-mac-10.15</em>. If this has been updated since then, change the command below to match that of the proper release version.</p>
+<p>1) First you will need to download the <code>libwebp</code> package to your Downloads folder: <a href="https://developers.google.com/speed/webp/download">developers.google.com/speed/webp/download</a>
+ - <em>Look for the "Download for macOS link"</em></p>
+<p>2) Next we will need to copy the <code>cwebp</code> folder to our <code>/usr/local/bin</code> directory:
+ - Open macOS Terminal
+ - Run <code>sudo cp /Downloads/libwebp-1.2.1-mac-10.15/bin/cwebp /usr/local/bin</code>
+ - <em>Note:</em> if the <code>/usr/local/bin</code> directory doesn't exist, simply create it by running: <code>sudo cd /usr/local &amp;&amp; mkdir bin</code></p>
+<h2>Creating our custom Automator script</h2>
+<p>1) Open the macOS Automator from the Applications folder</p>
+<p>2) Select <code>Quick Option</code> from the first prompt</p>
+<p>3) Set "Workflow receives current" to <code>image files</code></p>
+<p>4) Set the label "in" to <code>Finder</code></p>
+<p>5) From the left pane, select "Library &gt; Utilities"</p>
+<p>6) From the presented choices in the next pane, drag and drop <code>Run Shell Script</code> into the far right pane</p>
+<p>7) Set the area "Pass input" to <code>as arguments</code></p>
+<p>8) Enter the following code below as your script and type <code>⌘-S</code> to save (name it something like "Convert to webp")</p>
+<pre><code>for f in &quot;$@&quot;
+do
+/usr/local/bin/cwebp -q 85 &quot;$f&quot; -o &quot;${f%.*}.webp&quot;
+done
+</code></pre>
+<p>For visual reference, it should look something like this:</p>
+<p><figure>
+<img src="/public/images/automator.png" alt="macOS Automator">
+<figcaption>(<a href="/public/images/automator.webp">link to hi-res image</a>)</figcaption>
+</figure></p>
+<p>And when right-clicking an image file in the Finder window, it should now give you the option to convert:</p>
+<p><figure>
+<img src="/public/images/automator-2.png" alt="Right click to convert">
+<figcaption>(<a href="/public/images/automator-2.webp">link to hi-res image</a>)</figcaption>
+</figure></p>
+<h2>Making edits to your script</h2>
+<p>If you ever have the need to edit this script (for example, changing the default <code>85</code> quality parameter), you will need to navigate to your <code>~/Library/Services</code> folder and open your custom webp Quick Action in the Automator application. </p>
+<p>Simple as that!</p>
+<h2>Possible Hiccups</h2>
+<p>I was contacted by the very helpful <a href="https://kevq.uk">Kev Quirk</a> about a minor problem he encountered while following this tutorial. When trying to run <code>cwebp</code> he received the following error message:</p>
+<pre><code>cwebp cannot be opened because it's from an unverified developer
+</code></pre>
+<p>Doing the next steps seemed to have fixed this issue for him:</p>
+<ol>
+<li>Click on the "Open in Finder" in the error message prompt</li>
+<li>Double-click on the <code>cwebp</code> utility to open in Terminal</li>
+<li>You'll then be prompted with a pop-up asking if you wish to execute</li>
+</ol>
+<p>After following these steps, the issue should be resolved.</p>
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