From 47f60c3548582b06097ac559fed7fd278889f7a5 Mon Sep 17 00:00:00 2001
From: Oliver Lazoroski <oliver.lazoroski@gmail.com>
Date: Wed, 6 Nov 2024 16:55:40 +0100
Subject: [PATCH] fix: edge case where the length of enabledLayers doesn't
 match with the number of encodings

---
 packages/client/src/rtc/Publisher.ts | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/packages/client/src/rtc/Publisher.ts b/packages/client/src/rtc/Publisher.ts
index 8cf7e67afa..690571291a 100644
--- a/packages/client/src/rtc/Publisher.ts
+++ b/packages/client/src/rtc/Publisher.ts
@@ -390,12 +390,14 @@ export class Publisher {
 
     let changed = false;
     for (const encoder of params.encodings) {
-      const layer =
-        usesSvcCodec || enabledLayers.length === 1
-          ? // for SVC, we only have one layer (q) and often rid is omitted
-            enabledLayers[0]
-          : // for non-SVC, we need to find the layer by rid (simulcast)
-            enabledLayers.find((l) => l.name === encoder.rid);
+      const layer = usesSvcCodec
+        ? // for SVC, we only have one layer (q) and often rid is omitted
+          enabledLayers[0]
+        : // for non-SVC, we need to find the layer by rid (simulcast)
+          enabledLayers.find((l) => l.name === encoder.rid) ??
+            (enabledLayers.length === 1 && params.encodings.length === 1)
+          ? enabledLayers[0]
+          : undefined;
 
       // flip 'active' flag only when necessary
       const shouldActivate = !!layer?.active;