diff --git a/README.md b/README.md
index 20183ac47..ed42b3728 100755
--- a/README.md
+++ b/README.md
@@ -336,6 +336,7 @@ Remark:
 
 ## History
 
+* v2.0, 2017-04-09, Fix [#834][bug #834], crash for TS context corrupt. 2.0.235
 * <strong>v2.0, 2017-03-03, [2.0 release0(2.0.234)][r2.0r0] released. 86373 lines.</strong>
 * v2.0, 2017-02-25, for [#730][bug #730], remove the test code. 2.0.234
 * v2.0, 2017-02-09, fix [#503][bug #503] disable utilities when reload a source. 2.0.233
@@ -1279,6 +1280,7 @@ Winlin
 [bug #750]: https://github.com/ossrs/srs/issues/750
 [bug #752]: https://github.com/ossrs/srs/issues/752
 [bug #503]: https://github.com/ossrs/srs/issues/503
+[bug #834]: https://github.com/ossrs/srs/issues/834
 [bug #xxxxxxxxxx]: https://github.com/ossrs/srs/issues/xxxxxxxxxx
 
 [exo #828]: https://github.com/google/ExoPlayer/pull/828
diff --git a/trunk/auto/build_ffmpeg.sh b/trunk/auto/build_ffmpeg.sh
index 2bf106508..bb22511f2 100755
--- a/trunk/auto/build_ffmpeg.sh
+++ b/trunk/auto/build_ffmpeg.sh
@@ -42,7 +42,7 @@ else
     echo "build fdk-aac-0.1.3"
     cd $ff_current_dir &&
     rm -rf fdk-aac-0.1.3 && unzip -q ${ff_src_dir}/fdk-aac-0.1.3.zip &&
-    cd fdk-aac-0.1.3 && bash autogen.sh && ./configure --prefix=${ff_release_dir} --enable-static && make ${SRS_JOBS} && make install &&
+    cd fdk-aac-0.1.3 && bash autogen.sh && ./configure --prefix=${ff_release_dir} --enable-static && make ${SRS_JOBS} && make install
     ret=$?; if [[ 0 -ne ${ret} ]]; then echo "build fdk-aac-0.1.3 failed"; exit 1; fi
 fi
 
diff --git a/trunk/src/app/srs_app_rtmp_conn.cpp b/trunk/src/app/srs_app_rtmp_conn.cpp
index 12a00925e..637b52995 100755
--- a/trunk/src/app/srs_app_rtmp_conn.cpp
+++ b/trunk/src/app/srs_app_rtmp_conn.cpp
@@ -481,6 +481,14 @@ int SrsRtmpConn::stream_service_cycle()
         return ret;
     }
     srs_info("security check ok");
+    
+    // Never allow the empty stream name, for HLS may write to a file with empty name.
+    // @see https://github.com/ossrs/srs/issues/834
+    if (req->stream.empty()) {
+        ret = ERROR_RTMP_STREAM_NAME_EMPTY;
+        srs_error("RTMP: Empty stream name not allowed, ret=%d", ret);
+        return ret;
+    }
 
     // client is identified, set the timeout to service timeout.
     rtmp->set_recv_timeout(SRS_CONSTS_RTMP_RECV_TIMEOUT_US);
diff --git a/trunk/src/core/srs_core.hpp b/trunk/src/core/srs_core.hpp
index 8898fbdbc..bbc365bdb 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    234
+#define VERSION_REVISION    235
 
 // generated by configure, only macros.
 #include <srs_auto_headers.hpp>
diff --git a/trunk/src/kernel/srs_kernel_error.hpp b/trunk/src/kernel/srs_kernel_error.hpp
index 15ae8b1ad..aa2cddfc6 100755
--- a/trunk/src/kernel/srs_kernel_error.hpp
+++ b/trunk/src/kernel/srs_kernel_error.hpp
@@ -152,6 +152,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #define ERROR_RTSP_AUDIO_CONFIG             2047
 #define ERROR_RTMP_STREAM_NOT_FOUND         2048
 #define ERROR_RTMP_CLIENT_NOT_FOUND         2049
+#define ERROR_RTMP_STREAM_NAME_EMPTY        2050
 //                                           
 // system control message, 
 // not an error, but special control logic.
@@ -230,6 +231,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #define ERROR_RESPONSE_CODE                 3064
 #define ERROR_RESPONSE_DATA                 3065
 #define ERROR_REQUEST_DATA                  3066
+#define ERROR_TS_CONTEXT_NOT_READY          3067
 
 ///////////////////////////////////////////////////////
 // HTTP/StreamCaster protocol error.
diff --git a/trunk/src/kernel/srs_kernel_ts.cpp b/trunk/src/kernel/srs_kernel_ts.cpp
index 8335fc2ac..0b3580880 100644
--- a/trunk/src/kernel/srs_kernel_ts.cpp
+++ b/trunk/src/kernel/srs_kernel_ts.cpp
@@ -199,6 +199,7 @@ ISrsTsHandler::~ISrsTsHandler()
 
 SrsTsContext::SrsTsContext()
 {
+    ready = false;
     pure_audio = false;
     vcodec = SrsCodecVideoReserved;
     acodec = SrsCodecAudioReserved1;
@@ -234,6 +235,7 @@ void SrsTsContext::on_pmt_parsed()
 
 void SrsTsContext::reset()
 {
+    ready = false;
     vcodec = SrsCodecVideoReserved;
     acodec = SrsCodecAudioReserved1;
 }
@@ -432,6 +434,9 @@ int SrsTsContext::encode_pat_pmt(SrsFileWriter* writer, int16_t vpid, SrsTsStrea
             return ret;
         }
     }
+    
+    // When PAT and PMT are writen, the context is ready now.
+    ready = true;
 
     return ret;
 }
@@ -439,6 +444,13 @@ int SrsTsContext::encode_pat_pmt(SrsFileWriter* writer, int16_t vpid, SrsTsStrea
 int SrsTsContext::encode_pes(SrsFileWriter* writer, SrsTsMessage* msg, int16_t pid, SrsTsStream sid, bool pure_audio)
 {
     int ret = ERROR_SUCCESS;
+    
+    // Sometimes, the context is not ready(PAT/PMT write failed), error in this situation.
+    if (!ready) {
+        ret = ERROR_TS_CONTEXT_NOT_READY;
+        srs_error("TS: context not ready, ret=%d", ret);
+        return ret;
+    }
 
     if (msg->payload->length() == 0) {
         return ret;
diff --git a/trunk/src/kernel/srs_kernel_ts.hpp b/trunk/src/kernel/srs_kernel_ts.hpp
index 9af8bb0c9..ec7c9bf54 100644
--- a/trunk/src/kernel/srs_kernel_ts.hpp
+++ b/trunk/src/kernel/srs_kernel_ts.hpp
@@ -346,6 +346,11 @@ public:
 */
 class SrsTsContext
 {
+private:
+    // Whether context is ready, failed if try to write data when not ready.
+    // When PAT and PMT writen, the context is ready.
+    // @see https://github.com/ossrs/srs/issues/834
+    bool ready;
 // codec
 private:
     std::map<int, SrsTsChannel*> pids;