From 3d2658fa43b385863efa22b416bda3e504571eec Mon Sep 17 00:00:00 2001
From: Oscar <oscar.swyns@hotmail.com>
Date: Thu, 19 Mar 2026 22:33:16 +0100
Subject: [PATCH] Remove -copyts and add -flush_packets 1 to subtitle
 extraction

-copyts is unnecessary for -c:s copy to SRT and slows extraction ~5x.
Without -flush_packets 1, ffmpeg buffers all output until exit, leaving
.srt files at 0 bytes for minutes while the player shows no subtitles.

Fixes #16438
---
 MediaBrowser.MediaEncoding/Subtitles/SubtitleEncoder.cs | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/MediaBrowser.MediaEncoding/Subtitles/SubtitleEncoder.cs b/MediaBrowser.MediaEncoding/Subtitles/SubtitleEncoder.cs
index 61564e9b76..6b88439596 100644
--- a/MediaBrowser.MediaEncoding/Subtitles/SubtitleEncoder.cs
+++ b/MediaBrowser.MediaEncoding/Subtitles/SubtitleEncoder.cs
@@ -569,7 +569,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles
                 var outputPaths = new List<string>();
                 var args = string.Format(
                     CultureInfo.InvariantCulture,
-                    "-i {0} -copyts",
+                    "-i {0}",
                     inputPath);
 
                 foreach (var subtitleStream in subtitleStreams)
@@ -594,7 +594,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles
                     outputPaths.Add(outputPath);
                     args += string.Format(
                         CultureInfo.InvariantCulture,
-                        " -map 0:{0} -an -vn -c:s {1} \"{2}\"",
+                        " -map 0:{0} -an -vn -c:s {1} -flush_packets 1 \"{2}\"",
                         streamIndex,
                         outputCodec,
                         outputPath);
@@ -613,7 +613,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles
             var outputPaths = new List<string>();
             var args = string.Format(
                 CultureInfo.InvariantCulture,
-                "-i {0} -copyts",
+                "-i {0}",
                 inputPath);
 
             foreach (var subtitleStream in subtitleStreams)
@@ -639,7 +639,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles
                 outputPaths.Add(outputPath);
                 args += string.Format(
                     CultureInfo.InvariantCulture,
-                    " -map 0:{0} -an -vn -c:s {1} \"{2}\"",
+                    " -map 0:{0} -an -vn -c:s {1} -flush_packets 1 \"{2}\"",
                     streamIndex,
                     outputCodec,
                     outputPath);