From f9381a6fef810cfb94bec2cc27c45dd9cc63f3f0 Mon Sep 17 00:00:00 2001
From: Dw9 <xweimvp@gmail.com>
Date: Fri, 25 Aug 2023 18:22:31 +0800
Subject: [PATCH] =?UTF-8?q?rtc=E4=B8=8D=E6=94=AF=E6=8C=81=E7=9A=84track,?=
 =?UTF-8?q?=E4=B8=8D=E8=AE=BE=E7=BD=AEgroup=20attribute?=
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---
 webrtc/Sdp.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/webrtc/Sdp.cpp b/webrtc/Sdp.cpp
index ca33af88..bbb8d980 100644
--- a/webrtc/Sdp.cpp
+++ b/webrtc/Sdp.cpp
@@ -1555,7 +1555,10 @@ shared_ptr<RtcSession> RtcConfigure::createAnswer(const RtcSession &offer) const
     //设置音视频端口复用
     if (!offer.group.mids.empty()) {
         for (auto &m : ret->media) {
-            ret->group.mids.emplace_back(m.mid);
+            //The remote end has rejected (port 0) the m-section, so it should not be putting its mid in the group attribute.
+            if(m.port) {
+                ret->group.mids.emplace_back(m.mid);
+            }
         }
     }
     return ret;