???????:RTSP

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???????
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IPTV -- ??????

• ???????RTSP
• ???????????????,?????????,????????.
• ????RTP/RTCP
• RTP??RTP???????????,???????/????/???????????????
  ??,????????????????
• RTCP??????,????????
• ??????SDP
• ??????????????????????,?????
• ????????
• ?????????????

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?????
1RTP/RTCP???UDP???,RTSP???TCP??? 2?????????RTP?
,???????????? 3SDP??RTSP?,?????????????????
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RTSP ??????
RTSP????????,???HTTP??????? ?????????????????

• RTSP URL
• ????????????
• RTSP????
• ????????
• RTSP??
• ???????????????
• RTSP??
• ??????????

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• URL??
• rtsp_URL ( "rtsp" "rtspu" )
• "//" host "" port abs_path
• ??rtsp???????tcp?,rtspu?????udp??
• ????
• 1????????
• ltA HREFrtsp//192.168.0.124554/video/risk.mp4"
  gt
• ???lt/Agt
• ??????????????
• DESCRIBE rtsp//192.168.0.124554/video/risk.mp4
  
• CSeq 1
• 2?sdp????????
• ltA HREFhttp//www.skyiptv.com/video/risk.sdp"gt
• ????????http????SDP????
• GET /video/risk.sdp HTTP/1.1
• Host www.skyiptv.com

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• ??????
• ????
• C-gtA
• SETUP rtsp//audio.example.com/twister/audio.en
  RTSP/1.0
• CSeq 1
• TransportRTP/AVP/UDPunicastclient_port3056-305
  7
• A-gtC
• RTSP/1.0 200 OK
• CSeq 1
• Session 12345678
• Transport RTP/AVP/UDPunicastclient_port3056-30
  57 server_port5000-5001
• 1status line
• ??Status line CMD ?? ?????
• ??Status line ????? ???? ????

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• 2??????
• ??RFC889??,??HTTP/SIP???
• message-header field-name "" field-value
• ??????????,?????????????????
• ????
• (????????????? ????????)
• RTSP?????SDP??????,RTSP???????,SDP???
• SDP???????
• C-gtM
• DESCRIBE rtsp//server.example.com/demo/sound
  RTSP/1.0
• CSeq 1
• Accept application/sdp
• M-gtC
• RTSP/1.0 200 1 OK
• Content-type application/sdp
• Content-Length 44
• v0

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• RTSP????
• method direction object
  requirement
• DESCRIBE C-gtS P,S
  recommended
• ANNOUNCE C-gtS, S-gtC P,S
  optional
• GET_PARAMETER C-gtS, S-gtC P,S
  optional
• OPTIONS C-gtS, S-gtC P,S
  required
• 
  (S-gtC optional)
• PAUSE C-gtS P,S
  recommended
• PLAY C-gtS P,S
  required
• RECORD C-gtS P,S
  optional
• REDIRECT S-gtC P,S
  optional
• SETUP C-gtS S
  required
• SET_PARAMETER C-gtS, S-gtC P,S
  optional
• TEARDOWN C-gtS P,S
  required

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• RTSP??rtsp????
• A option ??,?????????,???????????
• OPTIONS RTSP/1.0
• SEQ 1
• SESSION12345678
• B DESC??,?????,?????????????
• DESCRIBE rtsp//server.example.com/demo/sound
  RTSP/1.0
• CSeq 1
• SESSION12345678
• Accept application/sdp
• C setup ??,?????,?????????????,??RTP
• ????
• SETUP rtsp//audio.example.com/twister/audio.en
  RTSP/1.0
• CSeq 1
• TransportRTP/AVP/UDPunicastclient_port3056-305
  7
• D PLAY/PAUSE/TEARDOWN??,?????,????????

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• PLAY rtsp//live.example.com/concert/audio
  RTSP/1.0
• CSeq 3
• Session 12345678
• PAUSE rtsp//live.example.com/concert/audio
  RTSP/1.0
• CSeq 3
• Session 12345678
• TEARDOWN rtsp//live.example.com/concert/audio
  RTSP/1.0
• CSeq 3
• Session 12345678
• EGETPARA
• ??????????
• GET_PARAMETER rtsp//live.example.com/concert/audi
  o RTSP/1.0
• CSeq 3
• Session 12345678
• ??

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• VOD???????
• ??RTSP??,???????????,??setup??????????
• ????????????????????
• 1SEEK??????????
• Range header
• ??RTSP?,????????,?????????????,??????
• ?????PLAY????????,??????,??????,????
• PAUSE????????????ntp?????
• C-gtS
• PLAY rtsp//audio.example.com/audio RTSP/1.0
• CSeq 836
• Session 12345678
• Range npt20-25 //?20?,???25?
• Range npt30- //?30?,???????

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• 2????????????
• Scale header
• ??RTSP?,?????????????????????,???Record
• Play????
• PAUSE????????????Sacle????Play?
• PLAY rtsp//audio.example.com/audio RTSP/1.0
• CSeq 836
• Session 12345678
• Scale2 //??????
• Scale0.5 //1/2?????
• Scale-1 //??
• Scale-2 //??????
• Scale-0.5 //??????
• Scale?Speed???
• Scale ?????????,???????????,?????
• ??????

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• 3?????
• ???????????,????SETUP??,??????????
• ????
• ?????????
• v0
• o- 2890844526 2890842807 IN IP4 192.16.24.202
• sRTSP Session
• maudio 0 RTP/AVP 0
• acontrolrtsp//audio.example.com/twister/audio.e
  n
• mvideo 0 RTP/AVP 31
• acontrolrtsp//video.example.com/twister/video
• ??????????????,?????????????,???
• ??????????????

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• RTSP???
• ????????,???PLAYING???
• ???

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RTP/RTCP ????
RTP?????????,??RTP??????RTCP ?????????,??????????
??????

• RTP
• ?????????????????(????????
• ?),??????????????????
• RTCP
• ???????????????,??QOS????????????????????
• ????
• ??????????????????????????
• ??
• ??????
• ????????????RTP??????

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RTP??

• RTP????RTP???RTP?????RTP????
• ????

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RTP??

• 1V2 ??? (2BIT)
• 2P ????? (1BIT),
• P1 ???????,???????????????
• P0 ?
• 3X ?????
• 4CC ???????
• 5M ??? ?????????
• 5M ??? ?????????
• 6PT ???? ?????????(????),??????,???????
• 7???16??,???????,???????????????????????
• 8rtp timestp 32??
• ???????,?????????????,??mpeg4??????????????
  ?mpeg?????????????????
• 9??????????
• 10???
• ???????????????

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RTP??????
?????????,?????????????????mp4 over
rtp,rfc?????????????????es???.

• 1MPEG-4???
• 2RTP ??????
• 2?rtp head???
• 3??????

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• MPEG4????

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MP4 RTP??????

• 1 RFC3016????MPEG4-?????????
• ?RTP???,??????????
• 2RFC3640????MPEG4 ?????????
• RTP???,????????????
• 3?MPEG4 SL???????RTP???,??
• ?MPEG4????
• 4?MPEG4 ?????FLEXmux???????
• ?,???RTP???
• ISMA 1.0????1,2????????????

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(No Transcript)
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SDP??

• 1 ???????,??????????????
• 2??????????????????
• 3????
• ???
• ??????
• ?????????
• ???????
• ?????(????????)
• ???
• ????(????)
• ????(rtp/udp/ip,h.320)
• ????(h.261/264,mpegxx,wmv)
• ???????
• 5????
• ???,UTF-8??lttypegtltvaluegt

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???SDP??

• ????
• 1 ?????
• oltusernamegt ltsession idgt ltversiongt ltnettypegt
  ltaddr typegt ltaddressgt
• ????????????????????
• ??
• omhandley 2890844526 2890842807 IN IP4
  126.16.64.4
• 2????
• cltnet typegt ltaddr typegt ltaddressgt(ltttlgt ltnumgt)
• ??????
• ??
• cIN IP4 192.168.0.124
• cIN IP4 224.2.17.12/127/3
• 3????
• tltstart timegt ltend timegt
• rltrepeat circlegt ltrun timegt lt offset list gt
• zltadjust timegt ltoffset valuegt ltadjust timegt
  ltoffset valuegt
• t3034423619 3042462419

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• 4 ????
• kltmethodgt
• kltmethodgtltcontentgt
• Kbase64xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
• ??????????????
• 5 ????
• alttypegtvalue
• artpmap98 MP4V-ES/90000
• afmtp98 profile-level-id145
• ????
• 1????
• mltmediagt ltportgt/ltnumber of portsgt lttransportgt
  ltfmt listgt
• mvideo 49170/2 RTP/AVP 31
• ??RFC3016?mp4????????

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• ????
• RFC 2326 - Real Time Streaming Protocol (RTSP)
• RFC 2327 - SDP Session Description Protocol
• RFC 3550 - RTP A Transport Protocol for
  Real-Time Applications
• RFC 3551 - RTP Profile for Audio and Video
  Conferences with Minimal Control
• RFC 3640 - RTP Payload Format for Transport of
  MPEG-4 Elementary Streams
• RFC 3016 - RTP Payload Format for MPEG-4
  Audio/Visual Streams

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