diff --git a/trunk/src/app/srs_app_dash.cpp b/trunk/src/app/srs_app_dash.cpp
index 8513d6d2c..06c0b1f89 100644
--- a/trunk/src/app/srs_app_dash.cpp
+++ b/trunk/src/app/srs_app_dash.cpp
@@ -68,7 +68,7 @@ int SrsMpegDash::on_publish()
     return ret;
 }
 
-int SrsMpegDash::on_audio(SrsSharedPtrMessage* shared_audio)
+int SrsMpegDash::on_audio(SrsSharedPtrMessage* shared_audio, SrsFormat* format)
 {
     int ret = ERROR_SUCCESS;
     
@@ -79,7 +79,7 @@ int SrsMpegDash::on_audio(SrsSharedPtrMessage* shared_audio)
     return ret;
 }
 
-int SrsMpegDash::on_video(SrsSharedPtrMessage* shared_video, bool is_sequence_header)
+int SrsMpegDash::on_video(SrsSharedPtrMessage* shared_video, SrsFormat* format)
 {
     int ret = ERROR_SUCCESS;
     
diff --git a/trunk/src/app/srs_app_dash.hpp b/trunk/src/app/srs_app_dash.hpp
index b623a62ab..7fc18b9fc 100644
--- a/trunk/src/app/srs_app_dash.hpp
+++ b/trunk/src/app/srs_app_dash.hpp
@@ -32,6 +32,14 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 class SrsRequest;
 class SrsOriginHub;
 class SrsSharedPtrMessage;
+class SrsFormat;
+
+/**
+ */
+class SrsFragmentedMp4
+{
+public:
+};
 
 /**
  * The MPEG-DASH encoder, transmux RTMP to DASH.
@@ -52,9 +60,9 @@ public:
     // When stream start publishing.
     virtual int on_publish();
     // When got an shared audio message.
-    virtual int on_audio(SrsSharedPtrMessage* shared_audio);
+    virtual int on_audio(SrsSharedPtrMessage* shared_audio, SrsFormat* format);
     // When got an shared video message.
-    virtual int on_video(SrsSharedPtrMessage* shared_video, bool is_sequence_header);
+    virtual int on_video(SrsSharedPtrMessage* shared_video, SrsFormat* format);
     // When stream stop publishing.
     virtual void on_unpublish();
 };
diff --git a/trunk/src/app/srs_app_hls.cpp b/trunk/src/app/srs_app_hls.cpp
index b5fa71646..758b2ccfa 100644
--- a/trunk/src/app/srs_app_hls.cpp
+++ b/trunk/src/app/srs_app_hls.cpp
@@ -1056,7 +1056,6 @@ SrsHls::SrsHls()
 {
     req = NULL;
     hub = NULL;
-    format = NULL;
     
     enabled = false;
     disposable = false;
@@ -1119,13 +1118,12 @@ int SrsHls::cycle()
     return ret;
 }
 
-int SrsHls::initialize(SrsOriginHub* h, SrsFormat* f, SrsRequest* r)
+int SrsHls::initialize(SrsOriginHub* h, SrsRequest* r)
 {
     int ret = ERROR_SUCCESS;
 
     hub = h;
     req = r;
-    format = f;
 
     if ((ret = controller->initialize()) != ERROR_SUCCESS) {
         return ret;
diff --git a/trunk/src/app/srs_app_hls.hpp b/trunk/src/app/srs_app_hls.hpp
index 345b1954e..973ea1c28 100644
--- a/trunk/src/app/srs_app_hls.hpp
+++ b/trunk/src/app/srs_app_hls.hpp
@@ -321,7 +321,6 @@ private:
     int64_t last_update_time;
 private:
     SrsOriginHub* hub;
-    SrsFormat* format;
     SrsRtmpJitter* jitter;
     SrsPithyPrint* pprint;
     /**
@@ -348,7 +347,7 @@ public:
     /**
     * initialize the hls by handler and source.
     */
-    virtual int initialize(SrsOriginHub* h, SrsFormat* f, SrsRequest* r);
+    virtual int initialize(SrsOriginHub* h, SrsRequest* r);
     /**
      * publish stream event, continue to write the m3u8,
      * for the muxer object not destroyed.
diff --git a/trunk/src/app/srs_app_source.cpp b/trunk/src/app/srs_app_source.cpp
index 6716c6f48..672c72b70 100755
--- a/trunk/src/app/srs_app_source.cpp
+++ b/trunk/src/app/srs_app_source.cpp
@@ -896,7 +896,7 @@ int SrsOriginHub::initialize(SrsSource* s, SrsRequest* r)
         return ret;
     }
     
-    if ((ret = hls->initialize(this, format, req)) != ERROR_SUCCESS) {
+    if ((ret = hls->initialize(this, req)) != ERROR_SUCCESS) {
         return ret;
     }
     
@@ -1018,7 +1018,7 @@ int SrsOriginHub::on_audio(SrsSharedPtrMessage* shared_audio)
         }
     }
     
-    if ((ret = dash->on_audio(msg)) != ERROR_SUCCESS) {
+    if ((ret = dash->on_audio(msg, format)) != ERROR_SUCCESS) {
         srs_warn("DASH failed, ignore and disable it. ret=%d", ret);
         dash->on_unpublish();
         ret = ERROR_SUCCESS;
@@ -1120,7 +1120,7 @@ int SrsOriginHub::on_video(SrsSharedPtrMessage* shared_video, bool is_sequence_h
         }
     }
     
-    if ((ret = dash->on_video(msg, is_sequence_header)) != ERROR_SUCCESS) {
+    if ((ret = dash->on_video(msg, format)) != ERROR_SUCCESS) {
         srs_warn("DASH failed, ignore and disable it. ret=%d", ret);
         dash->on_unpublish();
         ret = ERROR_SUCCESS;
@@ -1339,14 +1339,25 @@ int SrsOriginHub::on_reload_vhost_dash(string vhost)
     }
     
     SrsSharedPtrMessage* cache_sh_video = source->meta->vsh();
-    SrsSharedPtrMessage* cache_sh_audio = source->meta->ash();
-    if (cache_sh_video && (ret = dash->on_video(cache_sh_video, true)) != ERROR_SUCCESS) {
-        srs_error("DASH consume video failed. ret=%d", ret);
-        return ret;
+    if (cache_sh_video) {
+        if ((ret = format->on_video(cache_sh_video)) != ERROR_SUCCESS) {
+            return ret;
+        }
+        if ((ret = dash->on_video(cache_sh_video, format)) != ERROR_SUCCESS) {
+            srs_error("DASH consume video failed. ret=%d", ret);
+            return ret;
+        }
     }
-    if (cache_sh_audio && (ret = dash->on_audio(cache_sh_audio)) != ERROR_SUCCESS) {
-        srs_error("DASH consume audio failed. ret=%d", ret);
-        return ret;
+    
+    SrsSharedPtrMessage* cache_sh_audio = source->meta->ash();
+    if (cache_sh_audio) {
+        if ((ret = format->on_audio(cache_sh_audio)) != ERROR_SUCCESS) {
+            return ret;
+        }
+        if ((ret = dash->on_audio(cache_sh_audio, format)) != ERROR_SUCCESS) {
+            srs_error("DASH consume audio failed. ret=%d", ret);
+            return ret;
+        }
     }
     
     return ret;
@@ -1381,19 +1392,25 @@ int SrsOriginHub::on_reload_vhost_hls(string vhost)
     // when reload to start hls, hls will never get the sequence header in stream,
     // use the SrsSource.on_hls_start to push the sequence header to HLS.
     SrsSharedPtrMessage* cache_sh_video = source->meta->vsh();
-    SrsSharedPtrMessage* cache_sh_audio = source->meta->ash();
-    
-    // feed the hls the metadata/sequence header,
-    // when reload to start hls, hls will never get the sequence header in stream,
-    // use the SrsSource.on_hls_start to push the sequence header to HLS.
-    // TODO: maybe need to decode the metadata?
-    if (cache_sh_video && (ret = hls->on_video(cache_sh_video, format)) != ERROR_SUCCESS) {
-        srs_error("hls process video sequence header message failed. ret=%d", ret);
-        return ret;
+    if (cache_sh_video) {
+        if ((ret = format->on_video(cache_sh_video)) != ERROR_SUCCESS) {
+            return ret;
+        }
+        if ((ret = hls->on_video(cache_sh_video, format)) != ERROR_SUCCESS) {
+            srs_error("hls process video sequence header message failed. ret=%d", ret);
+            return ret;
+        }
     }
-    if (cache_sh_audio && (ret = hls->on_audio(cache_sh_audio, format)) != ERROR_SUCCESS) {
-        srs_error("hls process audio sequence header message failed. ret=%d", ret);
-        return ret;
+    
+    SrsSharedPtrMessage* cache_sh_audio = source->meta->ash();
+    if (cache_sh_audio) {
+        if ((ret = format->on_audio(cache_sh_audio)) != ERROR_SUCCESS) {
+            return ret;
+        }
+        if ((ret = hls->on_audio(cache_sh_audio, format)) != ERROR_SUCCESS) {
+            srs_error("hls process audio sequence header message failed. ret=%d", ret);
+            return ret;
+        }
     }
     
     return ret;
diff --git a/trunk/src/kernel/srs_kernel_ts.hpp b/trunk/src/kernel/srs_kernel_ts.hpp
index 27b827e4d..ed8db0f8e 100644
--- a/trunk/src/kernel/srs_kernel_ts.hpp
+++ b/trunk/src/kernel/srs_kernel_ts.hpp
@@ -1626,7 +1626,7 @@ private:
 };
 
 /**
- * Transmux the RTMP stream to TS stream.
+ * Transmux the RTMP stream to HTTP-TS stream.
  */
 class SrsTsTransmuxer
 {