Update

app/Helpers/FirstParty/Maintenance/MemeMediaMaintenance.php

@@ -0,0 +1,38 @@
+<?php
+
+namespace App\Helpers\FirstParty\Maintenance;
+
+use App\Models\MemeMedia;
+use ProtoneMedia\LaravelFFMpeg\Support\FFMpeg;
+
+class MemeMediaMaintenance
+{
+    public static function populateDurations()
+    {
+
+        $meme_medias_with_no_duration = self::getMemeMediasWithNoDuration();
+
+        $total = $meme_medias_with_no_duration->count();
+
+        foreach ($meme_medias_with_no_duration as $key => $meme_media) {
+
+            $current = $key + 1;
+            dump("Processing {$current}/{$total}: {$meme_media->webm_url}");
+            $meme_media->duration = self::getDurationUsingFfmpeg($meme_media);
+            $meme_media->save();
+        }
+    }
+
+    private static function getDurationUsingFfmpeg($meme_media)
+    {
+        $duration_milliseconds = FFMpeg::openUrl($meme_media->webm_url)->getDurationInMiliseconds();
+        $duration_seconds = ($duration_milliseconds / 1000);
+
+        return $duration_seconds;
+    }
+
+    private static function getMemeMediasWithNoDuration()
+    {
+        return MemeMedia::whereNull('duration')->get();
+    }
+}

app/Http/Controllers/TestController.php

@@ -8,4 +8,9 @@ public function index()
     {
         //
     }
+
+    public function populateDuration()
+    {
+        \App\Helpers\FirstParty\Maintenance\MemeMediaMaintenance::populateDurations();
+    }
 }