Add 'opus' extension to download rules

Add 'opus' extension to download rules

lib/Ytdl/Helper.php

@@ -30,7 +30,7 @@ class Helper
     public function getDownloadInfo(string $output): ?array
     {
         $rules = '#\[(?<module>(download|ExtractAudio|VideoConvertor|Merger|ffmpeg))\]((\s+|\s+Converting.*;\s+)Destination:\s+|\s+Merging formats into\s+\")' .
-            '(?<filename>.*\.(?<ext>(mp4|mp3|aac|webm|m4a|ogg|3gp|mkv|wav|flv)))#i';
+            '(?<filename>.*\.(?<ext>(mp4|mp3|aac|webm|m4a|ogg|3gp|mkv|wav|flv|opus)))#i';
 
         if (preg_match($rules, $output, $matches)) {
             return $matches;