Blacklist image based subtitles from being included in the playlist manifest.

src/API/Player/Playlist.php

@@ -72,7 +72,7 @@ readonly class Playlist
             foreach (findSideCarFiles(new SplFileInfo($path)) as $sideFile) {
                 $extension = getExtension($sideFile);
 
-                if (false === in_array($extension, self::ALLOWED_SUBS)) {
+                if (false === in_array($extension, array_keys(Subtitle::FORMATS))) {
                     continue;
                 }
 
@@ -164,6 +164,10 @@ readonly class Playlist
                     continue;
                 }
 
+                if (false === in_array(ag($x, 'codec_name'), Subtitle::INTERNAL_NAMING)) {
+                    continue;
+                }
+
                 $lang = ag($x, 'tags.language', 'und');
                 $title = ag($x, 'tags.title', 'Unknown');
 

src/API/Player/Subtitle.php

@@ -20,14 +20,14 @@ use Throwable;
 
 final readonly class Subtitle
 {
-    private const array FORMATS = [
+    public const array FORMATS = [
         'vtt' => 'text/vtt',
         'webvtt' => 'text/vtt',
         'srt' => 'text/srt',
         'ass' => 'text/ass',
     ];
 
-    private const array INTERNAL_NAMING = [
+    public const array INTERNAL_NAMING = [
         'subrip',
         'ass',
         'vtt'