diff --git a/app/src/main/java/net/ossrs/sea/SrsEncoder.java b/app/src/main/java/net/ossrs/sea/SrsEncoder.java
index 1f80f00..328abfb 100644
--- a/app/src/main/java/net/ossrs/sea/SrsEncoder.java
+++ b/app/src/main/java/net/ossrs/sea/SrsEncoder.java
@@ -27,15 +27,15 @@ public class SrsEncoder {
     public static int vbitrate = 500 * 1000;  // 500kbps
     public static final int VCROP_WIDTH = 384;   // Note: the stride of resolution must be set as 16x for hard encoding with some chip like MTK
     public static final int VCROP_HEIGHT = 640;  // Since Y component is quadruple size as U and V component, the stride must be set as 32x
-    public static final int VFPS = 15;
-    public static final int VGOP = 15;
+    public static final int VFPS = 24;
+    public static final int VGOP = 48;
     public static int VFORMAT = ImageFormat.YV12;
     public static final int ASAMPLERATE = 44100;
     public static final int ACHANNEL = AudioFormat.CHANNEL_IN_STEREO;
     public static final int AFORMAT = AudioFormat.ENCODING_PCM_16BIT;
     public static final int ABITRATE = 32 * 1000;  // 32kbps
 
-    private SrsRtmp muxer;
+    private SrsRtmpFlv muxer;
     private SrsRtmpPublisher publisher;
 
     private MediaCodec vencoder;
@@ -70,7 +70,7 @@ public class SrsEncoder {
 
     public int start() {
         publisher = new SrsRtmpPublisher(rtmpUrl);
-        muxer = new SrsRtmp(publisher);
+        muxer = new SrsRtmpFlv(publisher);
         try {
             muxer.start();
         } catch (IOException e) {
diff --git a/app/src/main/java/net/ossrs/sea/SrsRtmp.java b/app/src/main/java/net/ossrs/sea/SrsRtmpFlv.java
similarity index 99%
rename from app/src/main/java/net/ossrs/sea/SrsRtmp.java
rename to app/src/main/java/net/ossrs/sea/SrsRtmpFlv.java
index 0e0b10f..305057d 100644
--- a/app/src/main/java/net/ossrs/sea/SrsRtmp.java
+++ b/app/src/main/java/net/ossrs/sea/SrsRtmpFlv.java
@@ -41,7 +41,7 @@ import java.util.concurrent.ConcurrentLinkedQueue;
  *      muxer.stop();
  *      muxer.release();
  */
-public class SrsRtmp {
+public class SrsRtmpFlv {
     private volatile boolean connected;
     private SrsRtmpPublisher publisher;
 
@@ -62,7 +62,7 @@ public class SrsRtmp {
      * constructor.
      * @param p the rtmp publisher.
      */
-    public SrsRtmp(SrsRtmpPublisher p) {
+    public SrsRtmpFlv(SrsRtmpPublisher p) {
         sequenceHeaderOk = false;
         connected = false;
         flv = new SrsFlv();
@@ -201,7 +201,7 @@ public class SrsRtmp {
      */
     public void stop() throws IllegalStateException {
         if (worker == null || publisher == null) {
-            throw new IllegalStateException("SrsRtmp Not init!");
+            throw new IllegalStateException("SrsRtmpFlv Not init!");
         }
 
         disconnect();
@@ -793,7 +793,7 @@ public class SrsRtmp {
                 SrsAnnexbSearch tbbsc = utils.srs_avc_startswith_annexb(bb, bi);
                 if (!tbbsc.match || tbbsc.nb_start_code < 3) {
                     Log.e(TAG, "annexb not match.");
-                    SrsRtmp.srs_print_bytes(TAG, bb, 16);
+                    SrsRtmpFlv.srs_print_bytes(TAG, bb, 16);
                     throw new Exception(String.format("annexb not match for %dB, pos=%d", bi.size, bb.position()));
                 }
 
@@ -817,8 +817,8 @@ public class SrsRtmp {
                 tbb.size = bb.position() - pos;
                 if (bb.position() < bi.size) {
                     Log.i(TAG, String.format("annexb multiple match ok, pts=%d", bi.presentationTimeUs / 1000));
-                    SrsRtmp.srs_print_bytes(TAG, tbbs, 16);
-                    SrsRtmp.srs_print_bytes(TAG, bb.slice(), 16);
+                    SrsRtmpFlv.srs_print_bytes(TAG, tbbs, 16);
+                    SrsRtmpFlv.srs_print_bytes(TAG, bb.slice(), 16);
                 }
                 //Log.i(TAG, String.format("annexb match %d bytes", tbb.size));
                 break;