From fc1bee30a62e2e31682809c8245a117f7ecbddd5 Mon Sep 17 00:00:00 2001
From: David Schulte <mail@david-schulte.de>
Date: Mon, 15 Jul 2024 14:48:09 +0200
Subject: Allow streaming of raw PGS subtitles without transcoding (#12056)

---
 MediaBrowser.Model/Entities/MediaStream.cs | 33 ++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

(limited to 'MediaBrowser.Model/Entities')

diff --git a/MediaBrowser.Model/Entities/MediaStream.cs b/MediaBrowser.Model/Entities/MediaStream.cs
index e1082adead..9044c0524e 100644
--- a/MediaBrowser.Model/Entities/MediaStream.cs
+++ b/MediaBrowser.Model/Entities/MediaStream.cs
@@ -585,6 +585,31 @@ namespace MediaBrowser.Model.Entities
             }
         }
 
+        public bool IsPgsSubtitleStream
+        {
+            get
+            {
+                if (Type != MediaStreamType.Subtitle)
+                {
+                    return false;
+                }
+
+                if (string.IsNullOrEmpty(Codec) && !IsExternal)
+                {
+                    return false;
+                }
+
+                return IsPgsFormat(Codec);
+            }
+        }
+
+        /// <summary>
+        /// Gets a value indicating whether this is a subtitle steam that is extractable by ffmpeg.
+        /// All text-based and pgs subtitles can be extracted.
+        /// </summary>
+        /// <value><c>true</c> if this is a extractable subtitle steam otherwise, <c>false</c>.</value>
+        public bool IsExtractableSubtitleStream => IsTextSubtitleStream || IsPgsSubtitleStream;
+
         /// <summary>
         /// Gets or sets a value indicating whether [supports external stream].
         /// </summary>
@@ -666,6 +691,14 @@ namespace MediaBrowser.Model.Entities
                        && !string.Equals(codec, "sub", StringComparison.OrdinalIgnoreCase));
         }
 
+        public static bool IsPgsFormat(string format)
+        {
+            string codec = format ?? string.Empty;
+
+            return codec.Contains("pgs", StringComparison.OrdinalIgnoreCase)
+                   || string.Equals(codec, "sup", StringComparison.OrdinalIgnoreCase);
+        }
+
         public bool SupportsSubtitleConversionTo(string toCodec)
         {
             if (!IsTextSubtitleStream)
-- 
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