diff --git a/src/Rtmp/RtmpMediaSource.h b/src/Rtmp/RtmpMediaSource.h
index 71960c46..e0f80be0 100644
--- a/src/Rtmp/RtmpMediaSource.h
+++ b/src/Rtmp/RtmpMediaSource.h
@@ -53,9 +53,9 @@ public:
 	typedef std::shared_ptr<RtmpMediaSource> Ptr;
 	typedef RingBuffer<RtmpPacket::Ptr> RingType;
 
-	RtmpMediaSource(const string &vhost,const string &strApp, const string &strId) :
+	RtmpMediaSource(const string &vhost,const string &strApp, const string &strId,int ringSize = 32) :
 			MediaSource(RTMP_SCHEMA,vhost,strApp,strId),
-			_pRing(new RingBuffer<RtmpPacket::Ptr>()) {
+			_pRing(new RingBuffer<RtmpPacket::Ptr>(ringSize)) {
 	}
 	virtual ~RtmpMediaSource() {}
 
diff --git a/src/Rtmp/RtmpToRtspMediaSource.h b/src/Rtmp/RtmpToRtspMediaSource.h
index 5fd30d8b..f4ad7d98 100644
--- a/src/Rtmp/RtmpToRtspMediaSource.h
+++ b/src/Rtmp/RtmpToRtspMediaSource.h
@@ -53,7 +53,8 @@ public:
                           const string &app,
                           const string &id,
                           bool bEnableHls = true,
-                          bool bEnableMp4 = false):RtmpMediaSource(vhost, app, id){
+                          bool bEnableMp4 = false,
+						  int ringSize = 32):RtmpMediaSource(vhost, app, id,ringSize){
 		_recorder = std::make_shared<MediaRecorder>(vhost, app, id, bEnableHls, bEnableMp4);
 	}
 	virtual ~RtmpToRtspMediaSource(){}
diff --git a/src/Rtsp/RtspMediaSource.h b/src/Rtsp/RtspMediaSource.h
index f2c8f001..58a698a5 100644
--- a/src/Rtsp/RtspMediaSource.h
+++ b/src/Rtsp/RtspMediaSource.h
@@ -55,9 +55,9 @@ public:
 	typedef std::shared_ptr<RtspMediaSource> Ptr;
 	typedef RingBuffer<RtpPacket::Ptr> RingType;
 
-	RtspMediaSource(const string &strVhost,const string &strApp, const string &strId) :
+	RtspMediaSource(const string &strVhost,const string &strApp, const string &strId,int ringSize = 32) :
 			MediaSource(RTSP_SCHEMA,strVhost,strApp,strId),
-			_pRing(new RingBuffer<RtpPacket::Ptr>()) {
+			_pRing(new RingBuffer<RtpPacket::Ptr>(ringSize)) {
 	}
 	virtual ~RtspMediaSource() {}
 
diff --git a/src/Rtsp/RtspToRtmpMediaSource.h b/src/Rtsp/RtspToRtmpMediaSource.h
index 45a85b58..7eb1cde3 100644
--- a/src/Rtsp/RtspToRtmpMediaSource.h
+++ b/src/Rtsp/RtspToRtmpMediaSource.h
@@ -46,7 +46,8 @@ public:
                           const string &app,
                           const string &id,
                           bool bEnableHls = true,
-                          bool bEnableMp4 = false) : RtspMediaSource(vhost, app, id) {
+                          bool bEnableMp4 = false,
+                          int ringSize = 32) : RtspMediaSource(vhost, app, id,ringSize) {
         _recorder = std::make_shared<MediaRecorder>(vhost, app, id, bEnableHls, bEnableMp4);
     }