From a180b282688470c451d1b4156027bad43abaeb95 Mon Sep 17 00:00:00 2001
From: Aidan Ridley <aidan.ridley@charter.corp-partner.google.com>
Date: Wed, 26 Apr 2023 17:18:14 -0600
Subject: [PATCH] fix: PERIOD_FLATTENING_FAILED error with shaka 4.3.x that did
 not occur with shaka 3.1.2 (#5188)

Fixed handling of manifest with new codecs in later periods by adding
check for empty matchedStreams array in createNewOutputStrems()

Fixes #5183
---
 lib/util/periods.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/util/periods.js b/lib/util/periods.js
index 40559a2336..4d9ba851b2 100644
--- a/lib/util/periods.js
+++ b/lib/util/periods.js
@@ -728,7 +728,7 @@ shaka.util.PeriodCombiner = class {
       // in advance.  concat() will add them to the output's MetaSegmentIndex.
     }
 
-    if (!outputStream.matchedStreams) {
+    if (!outputStream.matchedStreams || !outputStream.matchedStreams.length) {
       // This is not a stream we can build output from, but it may become part
       // of another output based on another period's stream.
       return null;