Use a placeholder image if ffmpeg is missing instead of throwing an

exception which would get silently swallowed by swfUpload.

modules/gallery/helpers/graphics.php

@@ -135,7 +135,12 @@ class graphics_Core {
         if ($input_item->is_movie()) {
           // Convert the movie to a JPG first
           $output_file = preg_replace("/...$/", "jpg", $output_file);
-          movie::extract_frame($input_file, $output_file);
+          try {
+            movie::extract_frame($input_file, $output_file);
+          } catch (Exception $e) {
+            // Assuming this is MISSING_FFMPEG for now
+            copy(MODPATH . "gallery/images/missing_movie.png", $output_file);
+          }
           $working_file = $output_file;
         } else {
           $working_file = $input_file;

modules/gallery/helpers/movie.php

@@ -53,7 +53,12 @@ class movie_Core {
       throw new Exception("@todo NAME_CANNOT_END_IN_PERIOD");
     }
 
-    $movie_info = movie::getmoviesize($filename);
+    try {
+      $movie_info = movie::getmoviesize($filename);
+    } catch (Exception $e) {
+      // Assuming this is MISSING_FFMPEG for now
+      $movie_info = getimagesize(MODPATH . "gallery/images/missing_movie.png");
+    }
 
     // Force an extension onto the name
     $pi = pathinfo($filename);