diff --git a/trunk/src/app/srs_app_mpegts_udp.cpp b/trunk/src/app/srs_app_mpegts_udp.cpp
index 5efba53ef..8248bbbe6 100644
--- a/trunk/src/app/srs_app_mpegts_udp.cpp
+++ b/trunk/src/app/srs_app_mpegts_udp.cpp
@@ -388,6 +388,8 @@ int SrsMpegtsOverUdp::on_ts_video(SrsTsMessage* msg, SrsStream* avs)
 
         // for pps
         if (avc->is_pps(frame, frame_size)) {
+            got_sps_pps = true;
+            
             std::string pps;
             if ((ret = avc->pps_demux(frame, frame_size, pps)) != ERROR_SUCCESS) {
                 return ret;
@@ -405,21 +407,14 @@ int SrsMpegtsOverUdp::on_ts_video(SrsTsMessage* msg, SrsStream* avs)
             continue;
         }
         
-        // regenerat the ibp frame.
-        if (!avs->empty()) {
-            ibpframe = avs->data() + avs->pos();
-            ibpframe_size = avs->size() - avs->pos();
-        } else {
-            srs_info("mpegts: sps/pps frame consumed.");
+        // ibp frame.
+        srs_info("mpegts: demux avc ibp frame size=%d, dts=%d", ibpframe_size, dts);
+        if ((ret = write_h264_ipb_frame(frame, frame_size, dts, pts)) != ERROR_SUCCESS) {
             return ret;
         }
-
-        break;
     }
-
-    // ibp frame.
-    srs_info("mpegts: demux avc ibp frame size=%d, dts=%d", ibpframe_size, dts);
-    return write_h264_ipb_frame(ibpframe, ibpframe_size, dts, pts);
+    
+    return ret;
 }
 
 int SrsMpegtsOverUdp::write_h264_sps_pps(u_int32_t dts, u_int32_t pts)
diff --git a/trunk/src/app/srs_app_thread.cpp b/trunk/src/app/srs_app_thread.cpp
index 0b38c4d44..f37e49d70 100644
--- a/trunk/src/app/srs_app_thread.cpp
+++ b/trunk/src/app/srs_app_thread.cpp
@@ -210,11 +210,11 @@ failed:
         }
     }
     
-    handler->on_thread_stop();
-    srs_info("thread %s cycle finished", _name);
-
     // readly terminated now.
     really_terminated = true;
+    
+    handler->on_thread_stop();
+    srs_info("thread %s cycle finished", _name);
 }
 
 void* SrsThread::thread_fun(void* arg)
diff --git a/trunk/src/kernel/srs_kernel_codec.cpp b/trunk/src/kernel/srs_kernel_codec.cpp
index 20f636276..f695b4f49 100644
--- a/trunk/src/kernel/srs_kernel_codec.cpp
+++ b/trunk/src/kernel/srs_kernel_codec.cpp
@@ -91,8 +91,8 @@ string srs_codec_aac_object2str(SrsAacObjectType aac_object)
 {
     switch (aac_object) {
         case SrsAacObjectTypeAacMain: return "Main";
-        case SrsAacObjectTypeHE: return "HE";
-        case SrsAacObjectTypeHEV2: return "HEv2";
+        case SrsAacObjectTypeAacHE: return "HE";
+        case SrsAacObjectTypeAacHEV2: return "HEv2";
         case SrsAacObjectTypeAacLC: return "LC";
         case SrsAacObjectTypeAacSSR: return "SSR";
         default: return "Other";
@@ -113,8 +113,8 @@ SrsAacProfile srs_codec_aac_rtmp2ts(SrsAacObjectType object_type)
 {
     switch (object_type) {
         case SrsAacObjectTypeAacMain: return SrsAacProfileMain;
-        case SrsAacObjectTypeHE:
-        case SrsAacObjectTypeHEV2:
+        case SrsAacObjectTypeAacHE:
+        case SrsAacObjectTypeAacHEV2:
         case SrsAacObjectTypeAacLC: return SrsAacProfileLC;
         case SrsAacObjectTypeAacSSR: return SrsAacProfileSSR;
         default: return SrsAacProfileReserved;
diff --git a/trunk/src/kernel/srs_kernel_codec.hpp b/trunk/src/kernel/srs_kernel_codec.hpp
index 033484ef3..b619bb9e1 100644
--- a/trunk/src/kernel/srs_kernel_codec.hpp
+++ b/trunk/src/kernel/srs_kernel_codec.hpp
@@ -406,9 +406,9 @@ enum SrsAacObjectType
     SrsAacObjectTypeAacSSR = 3,
     
     // AAC HE = LC+SBR
-    SrsAacObjectTypeHE = 5,
+    SrsAacObjectTypeAacHE = 5,
     // AAC HEv2 = LC+SBR+PS
-    SrsAacObjectTypeHEV2 = 29,
+    SrsAacObjectTypeAacHEV2 = 29,
 };
 std::string srs_codec_aac_object2str(SrsAacObjectType aac_object);
 // ts/hls/adts audio header profile to RTMP sequence header object type.
diff --git a/trunk/src/kernel/srs_kernel_flv.cpp b/trunk/src/kernel/srs_kernel_flv.cpp
index 7d1923266..d34cb30fb 100644
--- a/trunk/src/kernel/srs_kernel_flv.cpp
+++ b/trunk/src/kernel/srs_kernel_flv.cpp
@@ -103,6 +103,7 @@ int SrsFlvEncoder::write_header(char flv_header[9])
         return ret;
     }
     
+    // previous tag size.
     char pts[] = { (char)0x00, (char)0x00, (char)0x00, (char)0x00 };
     if ((ret = _fs->write(pts, 4, NULL)) != ERROR_SUCCESS) {
         return ret;