From 14fa0b54ef6db119a16f9ab6da99ba544cf1ec62 Mon Sep 17 00:00:00 2001
From: cyannuk <cyannuk@issart.com>
Date: Sun, 29 Dec 2019 01:07:07 +0600
Subject: [PATCH] Take Track write Lock in NewRTPSender

Track is locking for reading when actually writing
is taking place
---
 README.md    | 1 +
 rtpsender.go | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index e41347c3..a203a8c5 100644
--- a/README.md
+++ b/README.md
@@ -131,6 +131,7 @@ Check out the **[contributing wiki](https://github.com/pion/webrtc/wiki/Contribu
 * [David Hamilton](https://github.com/dihamilton)
 * [Ilya Mayorov](https://github.com/faroyam)
 * [Patrick Lange](https://github.com/langep)
+* [cyannuk](https://github.com/cyannuk)
 
 ### License
 MIT License - see [LICENSE](LICENSE) for full text
diff --git a/rtpsender.go b/rtpsender.go
index 3e3f2737..188b1a30 100644
--- a/rtpsender.go
+++ b/rtpsender.go
@@ -33,8 +33,8 @@ func (api *API) NewRTPSender(track *Track, transport *DTLSTransport) (*RTPSender
 		return nil, fmt.Errorf("DTLSTransport must not be nil")
 	}
 
-	track.mu.RLock()
-	defer track.mu.RUnlock()
+	track.mu.Lock()
+	defer track.mu.Unlock()
 	if track.receiver != nil {
 		return nil, fmt.Errorf("RTPSender can not be constructed with remote track")
 	}