diff --git a/README.md b/README.md
index b775ca244..ad97e9ce7 100755
--- a/README.md
+++ b/README.md
@@ -345,6 +345,7 @@ Remark:
 
 ## History
 
+* v2.0, 2017-01-18, fix [#749][bug #749], timestamp overflow for ATC. 2.0.230
 * v2.0, 2017-01-11, fix [#740][bug #740], convert ts aac audio private stream 1 to common. 2.0.229
 * v2.0, 2017-01-11, fix [#588][bug #588], kbps interface error. 2.0.228
 * v2.0, 2017-01-11, fix [#736][bug #736], recovery the hls dispose. 2.0.227
@@ -1277,6 +1278,7 @@ Winlin
 [bug #736]: https://github.com/ossrs/srs/issues/736
 [bug #588]: https://github.com/ossrs/srs/issues/588
 [bug #740]: https://github.com/ossrs/srs/issues/740
+[bug #749]: https://github.com/ossrs/srs/issues/749
 [bug #xxxxxxxxxx]: https://github.com/ossrs/srs/issues/xxxxxxxxxx
 
 [exo #828]: https://github.com/google/ExoPlayer/pull/828
diff --git a/trunk/src/app/srs_app_source.cpp b/trunk/src/app/srs_app_source.cpp
index 8b495546b..1771bbb28 100755
--- a/trunk/src/app/srs_app_source.cpp
+++ b/trunk/src/app/srs_app_source.cpp
@@ -490,10 +490,20 @@ int SrsConsumer::enqueue(SrsSharedPtrMessage* shared_msg, bool atc, SrsRtmpJitte
         int duration_ms = queue->duration();
         bool match_min_msgs = queue->size() > mw_min_msgs;
         
+        // For ATC, maybe the SH timestamp bigger than A/V packet,
+        // when encoder republish or overflow.
+        // @see https://github.com/ossrs/srs/pull/749
+        if (atc && duration_ms < 0) {
+            st_cond_signal(mw_wait);
+            mw_waiting = false;
+            return ret;
+        }
+        
         // when duration ok, signal to flush.
         if (match_min_msgs && duration_ms > mw_duration) {
             st_cond_signal(mw_wait);
             mw_waiting = false;
+            return ret;
         }
     }
 #endif
diff --git a/trunk/src/core/srs_core.hpp b/trunk/src/core/srs_core.hpp
index cf38cfa60..8e9ce3c78 100644
--- a/trunk/src/core/srs_core.hpp
+++ b/trunk/src/core/srs_core.hpp
@@ -31,7 +31,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 // current release version
 #define VERSION_MAJOR       2
 #define VERSION_MINOR       0
-#define VERSION_REVISION    229
+#define VERSION_REVISION    230
 
 // generated by configure, only macros.
 #include <srs_auto_headers.hpp>