diff --git a/trunk/src/app/srs_app_http_conn.cpp b/trunk/src/app/srs_app_http_conn.cpp
index f72f9e87a3..2e006efc01 100644
--- a/trunk/src/app/srs_app_http_conn.cpp
+++ b/trunk/src/app/srs_app_http_conn.cpp
@@ -143,14 +143,16 @@ int SrsVodStream::serve_flv_stream(ISrsGoHttpResponseWriter* w, SrsHttpMessage*
 SrsStreamCache::SrsStreamCache(SrsSource* s)
 {
     source = s;
-    pthread = new SrsThread("http-stream", 
-        this, SRS_CONSTS_RTMP_PULSE_TIMEOUT_US, false);
+    queue = new SrsMessageQueue(true);
+    pthread = new SrsThread("http-stream", this, 0, false);
 }
 
 SrsStreamCache::~SrsStreamCache()
 {
     pthread->stop();
     srs_freep(pthread);
+    
+    srs_freep(queue);
 }
 
 int SrsStreamCache::start()
@@ -161,12 +163,60 @@ int SrsStreamCache::start()
 int SrsStreamCache::dump_cache(SrsConsumer* consumer)
 {
     int ret = ERROR_SUCCESS;
+    
+    if ((ret = queue->dump_packets(consumer, false, 0, 0, SrsRtmpJitterAlgorithmOFF)) != ERROR_SUCCESS) {
+        return ret;
+    }
+    
+    srs_trace("http: dump cache %d msgs, duration=%dms", queue->size(), queue->duration());
+    
     return ret;
 }
 
 int SrsStreamCache::cycle()
 {
     int ret = ERROR_SUCCESS;
+    
+    SrsConsumer* consumer = NULL;
+    if ((ret = source->create_consumer(consumer, false, false, true)) != ERROR_SUCCESS) {
+        srs_error("http: create consumer failed. ret=%d", ret);
+        return ret;
+    }
+    SrsAutoFree(SrsConsumer, consumer);
+    
+    SrsMessageArray msgs(SRS_PERF_MW_MSGS);
+    // TODO: FIMXE: add pithy print.
+    
+    // TODO: FIXME: config it.
+    queue->set_queue_size(60);
+    
+    while (true) {
+        // get messages from consumer.
+        // each msg in msgs.msgs must be free, for the SrsMessageArray never free them.
+        int count = 0;
+        if ((ret = consumer->dump_packets(&msgs, count)) != ERROR_SUCCESS) {
+            srs_error("http: get messages from consumer failed. ret=%d", ret);
+            return ret;
+        }
+        
+        if (count <= 0) {
+            srs_info("http: mw sleep %dms for no msg", mw_sleep);
+            // directly use sleep, donot use consumer wait.
+            st_usleep(SRS_CONSTS_RTMP_PULSE_TIMEOUT_US);
+            
+            // ignore when nothing got.
+            continue;
+        }
+        srs_info("http: got %d msgs, min=%d, mw=%d", count, 
+            SRS_PERF_MW_MIN_MSGS, SRS_CONSTS_RTMP_PULSE_TIMEOUT_US / 1000);
+    
+        // free the messages.
+        for (int i = 0; i < count; i++) {
+            SrsSharedPtrMessage* msg = msgs.msgs[i];
+            queue->enqueue(msg);
+        }
+    }
+    
     return ret;
 }
 
@@ -412,7 +462,7 @@ int SrsLiveStream::serve_http(ISrsGoHttpResponseWriter* w, SrsHttpMessage* r)
     
     // create consumer of souce, ignore gop cache, use the audio gop cache.
     SrsConsumer* consumer = NULL;
-    if ((ret = source->create_consumer(consumer, !enc->has_cache())) != ERROR_SUCCESS) {
+    if ((ret = source->create_consumer(consumer, true, true, !enc->has_cache())) != ERROR_SUCCESS) {
         srs_error("http: create consumer failed. ret=%d", ret);
         return ret;
     }
diff --git a/trunk/src/app/srs_app_http_conn.hpp b/trunk/src/app/srs_app_http_conn.hpp
index e60f04b4c4..b5c9e4777a 100644
--- a/trunk/src/app/srs_app_http_conn.hpp
+++ b/trunk/src/app/srs_app_http_conn.hpp
@@ -49,6 +49,7 @@ class SrsFlvEncoder;
 class SrsHttpParser;
 class SrsHttpMessage;
 class SrsHttpHandler;
+class SrsMessageQueue;
 class SrsSharedPtrMessage;
 
 /**
@@ -74,6 +75,7 @@ class SrsVodStream : public SrsGoHttpFileServer
 class SrsStreamCache : public ISrsThreadHandler
 {
 private:
+    SrsMessageQueue* queue;
     SrsSource* source;
     SrsThread* pthread;
 public:
diff --git a/trunk/src/app/srs_app_source.cpp b/trunk/src/app/srs_app_source.cpp
index 89286c923f..fb02137096 100644
--- a/trunk/src/app/srs_app_source.cpp
+++ b/trunk/src/app/srs_app_source.cpp
@@ -244,8 +244,9 @@ void SrsFastVector::free()
 }
 #endif
 
-SrsMessageQueue::SrsMessageQueue()
+SrsMessageQueue::SrsMessageQueue(bool ignore_shrink)
 {
+    _ignore_shrink = ignore_shrink;
     queue_size_ms = 0;
     av_start_time = av_end_time = -1;
 }
@@ -330,6 +331,26 @@ int SrsMessageQueue::dump_packets(int max_count, SrsSharedPtrMessage** pmsgs, in
     return ret;
 }
 
+int SrsMessageQueue::dump_packets(SrsConsumer* consumer, bool atc, int tba, int tbv, SrsRtmpJitterAlgorithm ag)
+{
+    int ret = ERROR_SUCCESS;
+    
+    int nb_msgs = (int)msgs.size();
+    if (nb_msgs <= 0) {
+        return ret;
+    }
+
+    SrsSharedPtrMessage** omsgs = msgs.data();
+    for (int i = 0; i < nb_msgs; i++) {
+        SrsSharedPtrMessage* msg = omsgs[i];
+        if ((ret = consumer->enqueue(msg, atc, tba, tbv, ag)) != ERROR_SUCCESS) {
+            return ret;
+        }
+    }
+    
+    return ret;
+}
+
 void SrsMessageQueue::shrink()
 {
     int iframe_index = -1;
@@ -364,8 +385,13 @@ void SrsMessageQueue::shrink()
         return;
     }
     
-    srs_trace("shrink the cache queue, size=%d, removed=%d, max=%.2f", 
-        (int)msgs.size(), iframe_index, queue_size_ms / 1000.0);
+    if (_ignore_shrink) {
+        srs_info("shrink the cache queue, size=%d, removed=%d, max=%.2f", 
+            (int)msgs.size(), iframe_index, queue_size_ms / 1000.0);
+    } else {
+        srs_trace("shrink the cache queue, size=%d, removed=%d, max=%.2f", 
+            (int)msgs.size(), iframe_index, queue_size_ms / 1000.0);
+    }
     
     // remove the first gop from the front
     for (int i = 0; i < iframe_index; i++) {
@@ -1702,7 +1728,7 @@ void SrsSource::on_unpublish()
     handler->on_unpublish(this, _req);
 }
 
-int SrsSource::create_consumer(SrsConsumer*& consumer, bool dump_gop_cache)
+int SrsSource::create_consumer(SrsConsumer*& consumer, bool ds, bool dm, bool dg)
 {
     int ret = ERROR_SUCCESS;
     
@@ -1730,14 +1756,14 @@ int SrsSource::create_consumer(SrsConsumer*& consumer, bool dump_gop_cache)
     SrsRtmpJitterAlgorithm ag = jitter_algorithm;
     
     // copy metadata.
-    if (cache_metadata && (ret = consumer->enqueue(cache_metadata, atc, tba, tbv, ag)) != ERROR_SUCCESS) {
+    if (dm && cache_metadata && (ret = consumer->enqueue(cache_metadata, atc, tba, tbv, ag)) != ERROR_SUCCESS) {
         srs_error("dispatch metadata failed. ret=%d", ret);
         return ret;
     }
     srs_info("dispatch metadata success");
     
     // copy sequence header
-    if (cache_sh_video && (ret = consumer->enqueue(cache_sh_video, atc, tba, tbv, ag)) != ERROR_SUCCESS) {
+    if (ds && cache_sh_video && (ret = consumer->enqueue(cache_sh_video, atc, tba, tbv, ag)) != ERROR_SUCCESS) {
         srs_error("dispatch video sequence header failed. ret=%d", ret);
         return ret;
     }
@@ -1750,10 +1776,12 @@ int SrsSource::create_consumer(SrsConsumer*& consumer, bool dump_gop_cache)
     srs_info("dispatch audio sequence header success");
     
     // copy gop cache to client.
-    if (dump_gop_cache) {
-        if ((ret = gop_cache->dump(consumer, atc, tba, tbv, ag)) != ERROR_SUCCESS) {
-            return ret;
-        }
+    if (dg && (ret = gop_cache->dump(consumer, atc, tba, tbv, ag)) != ERROR_SUCCESS) {
+        return ret;
+    }
+    
+    // print status.
+    if (dg) {
         srs_trace("create consumer, queue_size=%.2f, tba=%d, tbv=%d", queue_size, sample_rate, frame_rate);
     } else {
         srs_trace("create consumer, ignore gop cache, tba=%d, tbv=%d", sample_rate, frame_rate);
diff --git a/trunk/src/app/srs_app_source.hpp b/trunk/src/app/srs_app_source.hpp
index 84ddf2ea73..859f395ca4 100644
--- a/trunk/src/app/srs_app_source.hpp
+++ b/trunk/src/app/srs_app_source.hpp
@@ -38,6 +38,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <srs_app_reload.hpp>
 #include <srs_core_performance.hpp>
 
+class SrsConsumer;
 class SrsPlayEdge;
 class SrsPublishEdge;
 class SrsSource;
@@ -137,6 +138,7 @@ class SrsFastVector
 class SrsMessageQueue
 {
 private:
+    bool _ignore_shrink;
     int64_t av_start_time;
     int64_t av_end_time;
     int queue_size_ms;
@@ -146,7 +148,7 @@ class SrsMessageQueue
     std::vector<SrsSharedPtrMessage*> msgs;
 #endif
 public:
-    SrsMessageQueue();
+    SrsMessageQueue(bool ignore_shrink = false);
     virtual ~SrsMessageQueue();
 public:
     /**
@@ -176,6 +178,11 @@ class SrsMessageQueue
     * @max_count the max count to dequeue, must be positive.
     */
     virtual int dump_packets(int max_count, SrsSharedPtrMessage** pmsgs, int& count);
+    /**
+    * dumps packets to consumer, use specified args.
+    * @remark the atc/tba/tbv/ag are same to SrsConsumer.enqueue().
+    */
+    virtual int dump_packets(SrsConsumer* consumer, bool atc, int tba, int tbv, SrsRtmpJitterAlgorithm ag);
 private:
     /**
     * remove a gop from the front.
@@ -494,7 +501,17 @@ class SrsSource : public ISrsReloadHandler
     virtual void on_unpublish();
 // consumer methods
 public:
-    virtual int create_consumer(SrsConsumer*& consumer, bool dump_gop_cache = true);
+    /**
+    * create consumer and dumps packets in cache.
+    * @param consumer, output the create consumer.
+    * @param ds, whether dumps the sequence header.
+    * @param dm, whether dumps the metadata.
+    * @param dg, whether dumps the gop cache.
+    */
+    virtual int create_consumer(
+        SrsConsumer*& consumer, 
+        bool ds = true, bool dm = true, bool dg = true
+    );
     virtual void on_consumer_destroy(SrsConsumer* consumer);
     virtual void set_cache(bool enabled);
 // internal