From 04aba845d2a2d7d222b0d8dfa24aa4155724559d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?A=CC=81lvaro=20Velad=20Galva=CC=81n?= <ladvan91@hotmail.com>
Date: Tue, 21 May 2024 10:28:11 +0200
Subject: [PATCH] fix: Fix access to null properties

---
 index.js | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/index.js b/index.js
index 6ccb995..0e73eaa 100644
--- a/index.js
+++ b/index.js
@@ -187,10 +187,18 @@ class EmeEncryptionSchemePolyfill {
 
     // Wrap the MKSA object in ours to provide the missing field in the
     // returned configuration.
-    const videoScheme = filteredSupportedConfigurations[0]
-        .videoCapabilities[0].encryptionScheme;
-    const audioScheme = filteredSupportedConfigurations[0]
-        .audioCapabilities[0].encryptionScheme;
+    let videoScheme = null;
+    let audioScheme = null;
+    if (filteredSupportedConfigurations[0]) {
+      if (filteredSupportedConfigurations[0].videoCapabilities) {
+        videoScheme = filteredSupportedConfigurations[0]
+          .videoCapabilities[0].encryptionScheme;
+      }
+      if (filteredSupportedConfigurations[0].audioCapabilities) {
+        audioScheme = filteredSupportedConfigurations[0]
+          .audioCapabilities[0].encryptionScheme;
+      }
+    }
     return new EmeEncryptionSchemePolyfillMediaKeySystemAccess(
         mediaKeySystemAccess, videoScheme, audioScheme);
   }