diff --git a/app/src/main/java/net/ossrs/sea/SrsFlvMuxer.java b/app/src/main/java/net/ossrs/sea/SrsFlvMuxer.java
index c842397..044e5dc 100644
--- a/app/src/main/java/net/ossrs/sea/SrsFlvMuxer.java
+++ b/app/src/main/java/net/ossrs/sea/SrsFlvMuxer.java
@@ -197,10 +197,6 @@ public class SrsFlvMuxer {
      * stop the muxer, disconnect RTMP connection from SRS.
      */
     public void stop() {
-        if (worker == null || publisher == null) {
-            throw new IllegalStateException("SrsFlvMuxer Not init!");
-        }
-
         disconnect();
 
         if (worker != null) {
diff --git a/app/src/main/java/net/ossrs/sea/rtmp/io/RtmpSessionInfo.java b/app/src/main/java/net/ossrs/sea/rtmp/io/RtmpSessionInfo.java
index 816686e..927d02a 100644
--- a/app/src/main/java/net/ossrs/sea/rtmp/io/RtmpSessionInfo.java
+++ b/app/src/main/java/net/ossrs/sea/rtmp/io/RtmpSessionInfo.java
@@ -3,7 +3,6 @@ package net.ossrs.sea.rtmp.io;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
-import android.util.Log;
 import net.ossrs.sea.rtmp.packets.RtmpPacket;
 
 /**
diff --git a/app/src/main/java/net/ossrs/sea/rtmp/packets/RtmpHeader.java b/app/src/main/java/net/ossrs/sea/rtmp/packets/RtmpHeader.java
index 7a4df1e..d2683c3 100644
--- a/app/src/main/java/net/ossrs/sea/rtmp/packets/RtmpHeader.java
+++ b/app/src/main/java/net/ossrs/sea/rtmp/packets/RtmpHeader.java
@@ -402,17 +402,6 @@ public class RtmpHeader {
         this.timestampDelta = timestampDelta;
     }
 
-//
-//    /** Get the timestamp as specified by the server */
-//    public int getTimestamp() {
-//        return timestamp;
-//    }
-//    
-//
-//    /** Calculate and return the timestamp delta relative to START_TIMESTAMP */
-//    public int getTimestampDelta() {
-//        return (int) System.nanoTime() / 1000 - START_TIMESTAMP;
-//    }
     /** Sets the RTMP chunk stream ID (channel ID) for this chunk */
     public void setChunkStreamId(int channelId) {
         this.chunkStreamId = channelId;
@@ -434,12 +423,6 @@ public class RtmpHeader {
         this.packetLength = packetLength;
     }
 
-//    public void initStartTimeStamp() {
-//        if (START_TIMESTAMP == -1) {
-//            START_TIMESTAMP = (int) System.nanoTime() / 1000;
-//        }
-//        timestamp = 0;
-//    }
     public void writeAggregateHeaderByte(OutputStream out) throws IOException {
         // Aggregate header 0x11 : 11.. ....
         out.write(0xC0 | chunkStreamId);