From e2162f704ab77b719ed3d8618b9b21ebcd50c102 Mon Sep 17 00:00:00 2001
From: Raja Subramanian <raja.gobi@tutanota.com>
Date: Fri, 17 Jan 2025 01:08:12 +0530
Subject: [PATCH] Do not send DD extension if ID is 0. (#3339)

* disable temporal layer scaling

* remove dummy start

* do not add 0 id

* remove tests

* clean up
---
 pkg/sfu/downtrack.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkg/sfu/downtrack.go b/pkg/sfu/downtrack.go
index 6f7a7fac2..abd06f04f 100644
--- a/pkg/sfu/downtrack.go
+++ b/pkg/sfu/downtrack.go
@@ -874,7 +874,7 @@ func (d *DownTrack) WriteRTP(extPkt *buffer.ExtPacket, layer int32) error {
 	}
 
 	// add extensions
-	if tp.ddBytes != nil {
+	if d.dependencyDescriptorExtID != 0 && tp.ddBytes != nil {
 		hdr.SetExtension(uint8(d.dependencyDescriptorExtID), tp.ddBytes)
 	}
 	if d.playoutDelayExtID != 0 && d.playoutDelay != nil {