From a8b507ee65ccd8edc9aea2aef8a908fa272bb23c Mon Sep 17 00:00:00 2001
From: absidue <48293849+absidue@users.noreply.github.com>
Date: Wed, 22 Mar 2023 21:48:09 +0100
Subject: [PATCH] fix(toDash): Generate unique Representation ids (#366)

---
 src/utils/FormatUtils.ts | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/utils/FormatUtils.ts b/src/utils/FormatUtils.ts
index 4500109dc..adc9773b1 100644
--- a/src/utils/FormatUtils.ts
+++ b/src/utils/FormatUtils.ts
@@ -428,8 +428,15 @@ class FormatUtils {
     const url = new URL(format.decipher(player));
     url.searchParams.set('cpn', cpn || '');
 
+    let id;
+    if (format.audio_track) {
+      id = `${format.itag?.toString()}-${format.audio_track.id}`;
+    } else {
+      id = format.itag?.toString();
+    }
+
     const representation = this.#el(document, 'Representation', {
-      id: format.itag?.toString(),
+      id,
       codecs,
       bandwidth: format.bitrate?.toString(),
       audioSamplingRate: format.audio_sample_rate?.toString()