From f777a2e908b3a7912963581462a3c7d46817e221 Mon Sep 17 00:00:00 2001
From: ScrubN <72096833+ScrubN@users.noreply.github.com>
Date: Tue, 9 Jul 2024 23:52:34 -0400
Subject: [PATCH 1/2] Fix ffconcat URL

---
 TwitchDownloaderCore/Tools/FfmpegConcatList.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/TwitchDownloaderCore/Tools/FfmpegConcatList.cs b/TwitchDownloaderCore/Tools/FfmpegConcatList.cs
index c3ea6c5b..f6b5ad0d 100644
--- a/TwitchDownloaderCore/Tools/FfmpegConcatList.cs
+++ b/TwitchDownloaderCore/Tools/FfmpegConcatList.cs
@@ -7,7 +7,7 @@
 
 namespace TwitchDownloaderCore.Tools
 {
-    // https://www.ffmpeg.org/ffmpeg-formats.html#toc-concat-1
+    // https://www.ffmpeg.org/ffmpeg-formats.html#concat-1
     public static class FfmpegConcatList
     {
         private const string LINE_FEED = "\u000A";

From f88e07c4aad60ebbfc12d142c789bdf1720e639e Mon Sep 17 00:00:00 2001
From: ScrubN <72096833+ScrubN@users.noreply.github.com>
Date: Tue, 9 Jul 2024 23:54:54 -0400
Subject: [PATCH 2/2] Explicitly set stream ids in ffconcat list

---
 TwitchDownloaderCore/Tools/FfmpegConcatList.cs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/TwitchDownloaderCore/Tools/FfmpegConcatList.cs b/TwitchDownloaderCore/Tools/FfmpegConcatList.cs
index f6b5ad0d..38027745 100644
--- a/TwitchDownloaderCore/Tools/FfmpegConcatList.cs
+++ b/TwitchDownloaderCore/Tools/FfmpegConcatList.cs
@@ -27,6 +27,13 @@ public static async Task SerializeAsync(string filePath, M3U8 playlist, Range vi
                 await sw.WriteAsync(DownloadTools.RemoveQueryString(stream.Path));
                 await sw.WriteLineAsync('\'');
 
+                await sw.WriteLineAsync("stream");
+                await sw.WriteLineAsync("exact_stream_id 0x100"); // Audio
+                await sw.WriteLineAsync("stream");
+                await sw.WriteLineAsync("exact_stream_id 0x101"); // Video
+                await sw.WriteLineAsync("stream");
+                await sw.WriteLineAsync("exact_stream_id 0x102?"); // Subtitle
+
                 await sw.WriteAsync("duration ");
                 await sw.WriteLineAsync(stream.PartInfo.Duration.ToString(CultureInfo.InvariantCulture));
             }