From aed874803259173b251311a3c7ac66f38ebd4a32 Mon Sep 17 00:00:00 2001
From: David Zhao <dz@livekit.io>
Date: Thu, 30 Nov 2023 12:24:03 -0800
Subject: [PATCH] Disable VP9 for Safari 15, AV1 for Safari (incomplete
 support) (#950)

* Disable VP9 for Safari 15 (incomplete support), AV1 for Safari

* changeset
---
 .changeset/wild-steaks-switch.md |  5 +++++
 src/room/utils.ts                | 11 +++++++++++
 2 files changed, 16 insertions(+)
 create mode 100644 .changeset/wild-steaks-switch.md

diff --git a/.changeset/wild-steaks-switch.md b/.changeset/wild-steaks-switch.md
new file mode 100644
index 0000000000..58037ec06c
--- /dev/null
+++ b/.changeset/wild-steaks-switch.md
@@ -0,0 +1,5 @@
+---
+'livekit-client': patch
+---
+
+Disable VP9 for Safari 15, AV1 for Safari (incomplete support)
diff --git a/src/room/utils.ts b/src/room/utils.ts
index 06e7086d1b..228ef72cda 100644
--- a/src/room/utils.ts
+++ b/src/room/utils.ts
@@ -47,6 +47,10 @@ export function supportsAV1(): boolean {
   if (!('getCapabilities' in RTCRtpSender)) {
     return false;
   }
+  if (isSafari()) {
+    // Safari 17 on iPhone14 reports AV1 capability, but does not actually support it
+    return false;
+  }
   const capabilities = RTCRtpSender.getCapabilities('video');
   let hasAV1 = false;
   if (capabilities) {
@@ -69,6 +73,13 @@ export function supportsVP9(): boolean {
     // https://bugzilla.mozilla.org/show_bug.cgi?id=1633876
     return false;
   }
+  if (isSafari()) {
+    const browser = getBrowser();
+    if (browser?.version && compareVersions(browser.version, '16') < 0) {
+      // Safari 16 and below does not support VP9
+      return false;
+    }
+  }
   const capabilities = RTCRtpSender.getCapabilities('video');
   let hasVP9 = false;
   if (capabilities) {