From d491744961adccf95ab262434eab06fe35cb5238 Mon Sep 17 00:00:00 2001
From: "duanweiwei1982@gmail.com" <duanweiwei1982@gmail.com>
Date: Fri, 13 Oct 2023 11:39:24 +0800
Subject: [PATCH] fix: VP9 svc screenshare.

---
 lib/src/participant/local.dart | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/src/participant/local.dart b/lib/src/participant/local.dart
index d39e0108..23a37989 100644
--- a/lib/src/participant/local.dart
+++ b/lib/src/participant/local.dart
@@ -153,6 +153,14 @@ class LocalParticipant extends Participant<LocalTrackPublication> {
           scalabilityMode: 'L3T3_KEY',
         );
       }
+
+      // vp9 svc with screenshare has problem to encode, always use L1T3 here
+      if (track.source == TrackSource.screenShareVideo &&
+          publishOptions.videoCodec.toLowerCase() == 'vp9') {
+        publishOptions = publishOptions.copyWith(
+          scalabilityMode: 'L1T3',
+        );
+      }
     }
 
     // use constraints passed to getUserMedia by default