diff --git a/bricks/rtc.js b/bricks/rtc.js
index 89562a1..62b4626 100644
--- a/bricks/rtc.js
+++ b/bricks/rtc.js
@@ -330,6 +330,7 @@ bricks.RTCP2PConnect = class {
 		console.log(`${peer.id} state changed. new state=${pc.connectionState}`);
 		console.log('state=', pc.connectionState, typeof(pc.connectionState));
 		if (pc.connectionState == 'disconnected'){
+			this.peer_close(peer);
 			if (this.opts.on_pc_disconnected){
 				this.opts.on_pc_disconnected(peer);
 			}
@@ -338,6 +339,9 @@ bricks.RTCP2PConnect = class {
         if (pc.connectionState == 'connected'){
 			console.log('state is connected, data_connect=',
 						this.opts.data_connect);
+			if(this.opts.on_pc_connected){
+				this.opts.on_pc_connected(peer);
+			}
         }
 	}
 
@@ -379,9 +383,6 @@ bricks.RTCP2PConnect = class {
 		this.peers[peer.id].dc = pc.createDataChannel('chat', {ordered:true});
 		var dc = this.peers[peer.id].dc;
 		await this.dc_created(peer, this.peers[peer.id].dc);
-		if(this.opts.on_pc_connected){
-			this.opts.on_pc_connected(peer);
-		}
 		console.log('dc created', this.peers[peer.id].dc);
 	}
 	async createPeerConnection(peer){
@@ -460,6 +461,12 @@ bricks.RTCP2PConnect = class {
 		}
 		pc.close();
 		delete self.peers[peer.id];
+		var keys = Object.keys(self.peers);
+		if (keys.length == 0){
+			this.localVideo.srcObject.getTracks().forEach(track => track.stop());
+			this.local_stream.getTracks().forEach(track => track.stop());
+			this.local_screan.getTracks().forEach(track => track.stop());
+		}
 	}
 };