diff --git a/README.md b/README.md
index 60627e9197..c3d9ec5d43 100755
--- a/README.md
+++ b/README.md
@@ -525,6 +525,8 @@ Supported operating systems and hardware:
 
 ### SRS 2.0 history
 
+* v2.0, 2015-02-10, for [#311](https://github.com/winlinvip/simple-rtmp-server/issues/311), set pcr_base to dts. 2.0.114.
+* v2.0, 2015-02-10, fix [the bug](https://github.com/winlinvip/simple-rtmp-server/commit/87519aaae835199e5adb60c0ae2c1cd24939448c) of ibmf format which decoded in annexb.
 * v2.0, 2015-02-10, for [#310](https://github.com/winlinvip/simple-rtmp-server/issues/310), downcast aac SSR to LC. 2.0.113
 * v2.0, 2015-02-03, fix [#136](https://github.com/winlinvip/simple-rtmp-server/issues/136), support hls without io(in ram). 2.0.112
 * v2.0, 2015-01-31, for [#250](https://github.com/winlinvip/simple-rtmp-server/issues/250), support push MPEGTS over UDP to SRS. 2.0.111
diff --git a/trunk/src/core/srs_core.hpp b/trunk/src/core/srs_core.hpp
index c1f965ea72..c1ea1f939a 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    114
+#define VERSION_REVISION    115
 
 // server info.
 #define RTMP_SIG_SRS_KEY "SRS"
diff --git a/trunk/src/kernel/srs_kernel_ts.cpp b/trunk/src/kernel/srs_kernel_ts.cpp
index af1a752241..35c116dc2e 100644
--- a/trunk/src/kernel/srs_kernel_ts.cpp
+++ b/trunk/src/kernel/srs_kernel_ts.cpp
@@ -78,10 +78,6 @@ int aac_sample_rates[] =
     7350,     0,     0,    0
 };
 
-// @see: NGX_RTMP_HLS_DELAY, 
-// 63000: 700ms, ts_tbn=90000
-#define SRS_AUTO_HLS_DELAY 63000
-
 // @see: ngx_rtmp_mpegts_header
 u_int8_t mpegts_header[] = {
     /* TS */
@@ -228,6 +224,7 @@ class SrsMpegtsWriter
                     p[-1] |= 0x20; // Both Adaption and Payload
                     *p++ = 7;    // size
                     *p++ = 0x50; // random access + PCR
+                    // @see https://github.com/winlinvip/simple-rtmp-server/issues/311
                     p = write_pcr(p, frame->dts);
                 }
                 
@@ -284,11 +281,11 @@ class SrsMpegtsWriter
                 *p++ = header_size;
 
                 // pts; // 33bits
-                p = write_dts_pts(p, flags >> 6, frame->pts + SRS_AUTO_HLS_DELAY);
+                p = write_dts_pts(p, flags >> 6, frame->pts);
                 
                 // dts; // 33bits
                 if (frame->dts != frame->pts) {
-                    p = write_dts_pts(p, 1, frame->dts + SRS_AUTO_HLS_DELAY);
+                    p = write_dts_pts(p, 1, frame->dts);
                 }
             }