Fix missing audio issues with muted VODs (#1141)

* Fix ffconcat URL * Explicitly set stream ids in ffconcat list
lay295 · Jul 10, 2024 · 62ab414 · 62ab414
1 parent 50080e8
commit 62ab414
Showing 1 changed file with 8 additions and 1 deletion.
diff --git 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";
@@ -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));
             }