hi, I stream a mp4(h264+aac) file from a Darwin Streaming Server v5.5.3 and write a livemedia test client to test it. When I do seeking operation, I find that when the client send pause, seek and play command and start playing again, there will be a gap in the DSS's RTCP SR ntpTimestamp(I print out this in RTPReceptionStats::noteIncomingSR()), and this will cause the MediaSubsession::getNormalPlayTime return a wrong NPT, jump from 201.17 to 3.78. I think when client do seeking operation and send the rtsp play command, the RTPReceptionStats::fHasBeenSynchronized should be set to false, so that MediaSubsession::getNormalPlayTime can update the value of fNPT_PTS_Offset with the new ntpTimestamp in the following RTCP SR. Or if this jump of ntpTimestamp is a bug of the DSS server? Could you please give me some advise? I paste some of the logs after the mail. I print a message in MediaSubsession::getNormalPlayTime(), and print a message when the client receive incoming SR. The format is [ptsDouble*scale()]+[fNPT_PTS_Offset]=NPT[npt]-[curPacketRTPTimestamp][rtpInfo.timestamp]--A/V [1223617239.875652]-[-1223617038.702323]=NPT[201.173325]-[9813284][9756964]--A Thank you very much for your help! Yours, mw ------------------------------------------------------------------------------------------------------- Sending request: PLAY rtsp://192.168.1.11/test.mp4/ RTSP/1.0 CSeq: 4 Session: 70888435244962 Range: npt=0.000- User-Agent: RTP demuxer (LIVE555 Streaming Media v2008.05.12)
Received PLAY response: RTSP/1.0 200 OK Server: DSS/5.5.3 (Build/489.12; Platform/Win32; Release/Darwin; ) Cseq: 4 Session: 70888435244962 Range: npt=0.00000-2099.88267 RTP-Info: url=rtsp://192.168.1.11/test.mp4/trackID=2;seq=30349;rtptime=4447,url=rtsp://192.168.1.11/test.mp4/trackID=6;seq=10665;rtptime=24057 (...omit some lines) [1223617035.630666]-[-1223617035.460000]=NPT[0.170666]-[9524][1332]--A [1223617035.660000]-[-1223617035.460000]=NPT[0.200000]-[46350][28350]--V [1223617035.715999]-[-1223617035.460000]=NPT[0.255999]-[13620][1332]--A [1223617035.700000]-[-1223617035.460000]=NPT[0.240000]-[49950][28350]--V (...omit some lines) [1223617037.820000]-[-1223617035.460000]=NPT[2.360000]-[240750][28350]--V [1223617037.849324]-[-1223617035.460000]=NPT[2.389324]-[116020][1332]--A [1223617037.849324]-[-1223617035.460000]=NPT[2.389324]-[116020][1332]--A [1223617037.860000]-[-1223617035.460000]=NPT[2.400000]-[244350][28350]--V ( seek to 200s) Sending request: PAUSE rtsp://192.168.1.11/test.mp4/ RTSP/1.0 CSeq: 5 Session: 21775484192068 User-Agent: RTP demuxer (LIVE555 Streaming Media v2008.05.12) [1223617038.019990]-[-1223617035.460000]=NPT[2.559990]-[124212][1332]--A [1223617038.019990]-[-1223617035.460000]=NPT[2.559990]-[124212][1332]--A Received PAUSE response: RTSP/1.0 200 OK Server: DSS/5.5.3 (Build/489.12; Platform/Win32; Release/Darwin; ) Cseq: 5 Session: 21775484192068 [1223617037.980000]-[-1223617035.460000]=NPT[2.520000]-[255150][28350]--V [1223617038.020000]-[-1223617035.460000]=NPT[2.560000]-[258750][28350]--V ===[noteIncomingSR][line:365]fSyncTime[0.000000]fSyncTimestamp[892679493] ===[noteIncomingSR][line:372]fSyncTime[1223617039.690000]fSyncTimestamp[171685] Sending request: PLAY rtsp://192.168.1.11/test.mp4/ RTSP/1.0 CSeq: 6 Session: 21775484192068 Range: npt=200.000- User-Agent: RTP demuxer (LIVE555 Streaming Media v2008.05.12) [1223617238.702323]-[-1223617035.460000]=NPT[203.242325]-[9756964][1332]--A Received PLAY response: RTSP/1.0 200 OK Server: DSS/5.5.3 (Build/489.12; Platform/Win32; Release/Darwin; ) Cseq: 6 Session: 21775484192068 Range: npt=200.00000-2099.88267 RTP-Info: url=rtsp://192.168.1.11/test.mp4/trackID=2;seq=4179;rtptime=18324000,url=rtsp://192.168.1.11/test.mp4/trackID=6;seq=21669;rtptime=9756964 (...omit some lines) [1223617239.875652]-[-1223617038.702323]=NPT[201.173325]-[9813284][9756964]--A [1223617239.875652]-[-1223617038.702323]=NPT[201.173325]-[9813284][9756964]--A [1223617239.875652]-[-1223617038.702323]=NPT[201.173325]-[9813284][9756964]--A [1223617239.864999]-[-1223617038.744999]=NPT[201.119995]-[18424800][18324000]--V [1223617239.904999]-[-1223617038.744999]=NPT[201.160004]-[18428400][18324000]--V [1223617239.944999]-[-1223617038.744999]=NPT[201.199997]-[18432000][18324000]--V ===[noteIncomingSR][line:365]fSyncTime[1223617239.875652]fSyncTimestamp[9813284] ===[noteIncomingSR][line:372]fSyncTime[1223617042.483000]fSyncTimestamp[9817380] ===[noteIncomingSR][line:365]fSyncTime[1223617239.944999]fSyncTimestamp[18432000] ===[noteIncomingSR][line:372]fSyncTime[1223617042.508000]fSyncTimestamp[18435600] [1223617042.483000]-[-1223617038.702323]=NPT[3.780677]-[9817380][9756964]--A [1223617042.483000]-[-1223617038.702323]=NPT[3.780677]-[9817380][9756964]--A [1223617042.483000]-[-1223617038.702323]=NPT[3.780677]-[9817380][9756964]--A [1223617042.483000]-[-1223617038.702323]=NPT[3.780677]-[9817380][9756964]--A [1223617042.508000]-[-1223617038.744999]=NPT[3.763001]-[18435600][18324000]--V [1223617042.568333]-[-1223617038.702323]=NPT[3.866010]-[9821476][9756964]--A [1223617042.568333]-[-1223617038.702323]=NPT[3.866010]-[9821476][9756964]--A _______________________________________________ live-devel mailing list live-devel@lists.live555.com http://lists.live555.com/mailman/listinfo/live-devel
