for #268, refine the pcr start at 0, dts/pts plus delay. 2.0.105

@@ -521,6 +521,7 @@ Supported operating systems and hardware:
 
 ### SRS 2.0 history
 
+* v2.0, 2015-01-25, hotfix [#268](https://github.com/winlinvip/simple-rtmp-server/issues/268), refine the pcr start at 0, dts/pts plus delay. 2.0.105
 * v2.0, 2015-01-25, hotfix [#151](https://github.com/winlinvip/simple-rtmp-server/issues/151), refine pcr=dts-800ms and use dts/pts directly. 2.0.104
 * v2.0, 2015-01-23, hotfix [#151](https://github.com/winlinvip/simple-rtmp-server/issues/151), use absolutely overflow to make jwplayer happy. 2.0.103
 * v2.0, 2015-01-22, for [#293](https://github.com/winlinvip/simple-rtmp-server/issues/293), support http live ts stream. 2.0.101.
@@ -585,6 +586,7 @@ Supported operating systems and hardware:
 
 ### SRS 1.0 history
 
+* v1.0, 2015-01-25, hotfix [#268](https://github.com/winlinvip/simple-rtmp-server/issues/268), refine the pcr start at 0, dts/pts plus delay. 1.0.25
 * v1.0, 2015-01-25, hotfix [#151](https://github.com/winlinvip/simple-rtmp-server/issues/151), refine pcr=dts-800ms and use dts/pts directly. 1.0.24
 * v1.0, 2015-01-23, hotfix [#151](https://github.com/winlinvip/simple-rtmp-server/issues/151), use absolutely overflow to make jwplayer happy. 1.0.23
 * v1.0, 2015-01-17, hotfix [#290](https://github.com/winlinvip/simple-rtmp-server/issues/290), use iformat only for rtmp input. 1.0.22

@@ -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    104
+#define VERSION_REVISION    105
 
 // server info.
 #define RTMP_SIG_SRS_KEY "SRS"

@@ -198,7 +198,7 @@ public:
                     p[-1] |= 0x20; // Both Adaption and Payload
                     *p++ = 7;    // size
                     *p++ = 0x50; // random access + PCR
-                    p = write_pcr(p, frame->dts - SRS_AUTO_HLS_DELAY);
+                    p = write_pcr(p, frame->dts);
                 }
                 
                 // PES header
@@ -330,10 +330,12 @@ private:
     }
     static char* write_pcr(char* p, int64_t pcr)
     {
-        // the pcr=dts-delay
-        // and the pcr maybe negative
+        // the pcr=dts-delay, where dts = frame->dts + delay
+        // and the pcr should never be negative
         // @see https://github.com/winlinvip/simple-rtmp-server/issues/268
-        int64_t v = srs_max(0, pcr);
+        srs_assert(pcr >= 0);
+        
+        int64_t v = pcr;
         
         *p++ = (char) (v >> 25);
         *p++ = (char) (v >> 17);