From 00546909c02841c7e404766b13f2c02e42e3f6fc Mon Sep 17 00:00:00 2001
From: absidue <48293849+absidue@users.noreply.github.com>
Date: Tue, 31 Dec 2024 10:12:21 +0100
Subject: [PATCH] fix(toDash): Fix default audio stream for dubbed movie
 trailers (#858)

---
 src/utils/StreamingInfo.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/utils/StreamingInfo.ts b/src/utils/StreamingInfo.ts
index 85eb566a..f0c63fcd 100644
--- a/src/utils/StreamingInfo.ts
+++ b/src/utils/StreamingInfo.ts
@@ -425,7 +425,8 @@ function getTrackRoles(format: Format, has_drc_streams: boolean) {
   }
 
   const roles: ('main' | 'dub' | 'description' | 'enhanced-audio-intelligibility' | 'alternate')[] = [
-    format.is_original ? 'main' : 'alternate'
+    // movie trailers can have a dubbed track as the only audio track so is_original is false but format.audio_track.audio_is_default is true
+    format.is_original || format.audio_track?.audio_is_default ? 'main' : 'alternate'
   ];
 
   if (format.is_dubbed || format.is_auto_dubbed)