php-ffmpeg in main composer file for dev + check php-ffmpeg is installed in constraint class

Author: symfonyaml

composer.json

@@ -159,7 +159,8 @@
         "twig/cssinliner-extra": "^2.12|^3",
         "twig/inky-extra": "^2.12|^3",
         "twig/markdown-extra": "^2.12|^3",
-        "web-token/jwt-library": "^3.3.2|^4.0"
+        "web-token/jwt-library": "^3.3.2|^4.0",
+        "php-ffmpeg/php-ffmpeg": "^1.3"
     },
     "conflict": {
         "ext-psr": "<1.1|>=2",

src/Symfony/Component/Validator/Constraints/Video.php

@@ -185,6 +185,10 @@ public function __construct(
         $this->allowPortraitMessage = $allowPortraitMessage ?? $this->allowPortraitMessage;
         $this->corruptedMessage = $corruptedMessage ?? $this->corruptedMessage;
 
+        if (!class_exists(\FFMpeg\FFProbe::class)) {
+            throw new \LogicException('The "php-ffmpeg/php-ffmpeg" library must be installed to use the Video constraint. Try running "composer require php-ffmpeg/php-ffmpeg".');
+        }
+
         if (!\in_array('video/*', (array) $this->mimeTypes, true) && !\array_key_exists('mimeTypesMessage', $options ?? []) && null === $mimeTypesMessage) {
             $this->mimeTypesMessage = 'The mime type of the file is invalid ({{ type }}). Allowed mime types are {{ types }}.';
         }