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Internet Engineering Task Force (IETF) H. Schulzrinne

Request for Comments: 7826 Columbia University

Obsoletes:

2326 A. Rao

Category: Standards Track Cisco

ISSN: 2070-1721 R. Lanphier

M. Westerlund

Ericsson

M. Stiemerling, Ed.

University of Applied Sciences Darmstadt

December 2016

Real-Time Streaming Protocol Version 2.0

Abstract

This memorandum defines the Real-Time Streaming Protocol (RTSP)

version 2.0, which obsoletes RTSP version 1.0 defined in

RFC 2326.

RTSP is an application-layer protocol for the setup and control of

the delivery of data with real-time properties. RTSP provides an

extensible framework to enable controlled, on-demand delivery of

real-time data, such as audio and video. Sources of data can include

both live data feeds and stored clips. This protocol is intended to

control multiple data delivery sessions; provide a means for choosing

delivery channels such as UDP, multicast UDP, and TCP; and provide a

means for choosing delivery mechanisms based upon RTP (

RFC 3550).

Status of This Memo

This is an Internet Standards Track document.

This document is a product of the Internet Engineering Task Force

(IETF). It represents the consensus of the IETF community. It has

received public review and has been approved for publication by the

Internet Engineering Steering Group (IESG). Further information on

Internet Standards is available in Section 2 of RFC 7841.

Information about the current status of this document, any errata,

and how to provide feedback on it may be obtained at

http://www.rfc-editor.org/info/rfc7826.

Schulzrinne, et al. Standards Track [Page 1]

RFC 7826

RTSP 2.0 December 2016

This document is subject to

BCP 78 and the IETF Trust’s Legal

Provisions Relating to IETF Documents

(

http://trustee.ietf.org/license-info) in effect on the date of

publication of this document. Please review these documents

carefully, as they describe your rights and restrictions with respect

to this document. Code Components extracted from this document must

include Simplified BSD License text as described in Section 4.e of

the Trust Legal Provisions and are provided without warranty as

described in the Simplified BSD License.

This document may contain material from IETF Documents or IETF

Contributions published or made publicly available before November

10, 2008. The person(s) controlling the copyright in some of this

material may not have granted the IETF Trust the right to allow

modifications of such material outside the IETF Standards Process.

Without obtaining an adequate license from the person(s) controlling

the copyright in such materials, this document may not be modified

outside the IETF Standards Process, and derivative works of it may

not be created outside the IETF Standards Process, except to format

it for publication as an RFC or to translate it into languages other

than English.

Table of Contents

1. Introduction ...................................................10

2. Protocol Overview ..............................................11

2.1. Presentation Description ..................................12

2.2. Session Establishment .....................................12

2.3. Media Delivery Control ....................................14

2.4. Session Parameter Manipulations ...........................15

2.5. Media Delivery ............................................16

2.5.1. Media Delivery Manipulations .......................16

2.6. Session Maintenance and Termination .......................19

2.7. Extending RTSP ............................................20

3. Document Conventions ...........................................21

3.1. Notational Conventions ....................................21

3.2. Terminology ...............................................21

4. Protocol Parameters ............................................25

4.1. RTSP Version ..............................................25

4.2. RTSP IRI and URI ..........................................25

4.3. Session Identifiers .......................................28

Schulzrinne, et al. Standards Track [Page 2]

RFC 7826

RTSP 2.0 December 2016

4.4. Media-Time Formats ........................................28

4.4.1. SMPTE-Relative Timestamps ..........................28

4.4.2. Normal Play Time ...................................29

4.4.3. Absolute Time ......................................30

4.5. Feature Tags ..............................................31

4.6. Message Body Tags .........................................32

4.7. Media Properties ..........................................32

4.7.1. Random Access and Seeking ..........................33

4.7.2. Retention ..........................................34

4.7.3. Content Modifications ..............................34

4.7.4. Supported Scale Factors ............................34

4.7.5. Mapping to the Attributes ..........................35

5. RTSP Message ...................................................35

5.1. Message Types .............................................36

5.2. Message Headers ...........................................36

5.3. Message Body ..............................................37

5.4. Message Length ............................................37

6. General-Header Fields ..........................................37

7. Request ........................................................39

7.1. Request Line ..............................................40

7.2. Request-Header Fields .....................................42

8. Response .......................................................43

8.1. Status-Line ...............................................43

8.1.1. Status Code and Reason Phrase ......................43

8.2. Response Headers ..........................................47

9. Message Body ...................................................47

9.1. Message Body Header Fields ................................48

9.2. Message Body ..............................................49

9.3. Message Body Format Negotiation ...........................49

10. Connections ...................................................50

10.1. Reliability and Acknowledgements .........................50

10.2. Using Connections ........................................51

10.3. Closing Connections ......................................54

10.4. Timing Out Connections and RTSP Messages .................56

10.5. Showing Liveness .........................................57

10.6. Use of IPv6 ..............................................58

10.7. Overload Control .........................................58

11. Capability Handling ...........................................60

11.1. Feature Tag: play.basic ..................................62

12. Pipelining Support ............................................62

13. Method Definitions ............................................63

13.1. OPTIONS ..................................................65

13.2. DESCRIBE .................................................66

13.3. SETUP ....................................................68

13.3.1. Changing Transport Parameters .....................71

13.4. PLAY .....................................................72

13.4.1. General Usage .....................................72

13.4.2. Aggregated Sessions ...............................77

Schulzrinne, et al. Standards Track [Page 3]

RFC 7826

RTSP 2.0 December 2016

13.4.3. Updating Current PLAY Requests ....................78

13.4.4. Playing On-Demand Media ...........................81

13.4.5. Playing Dynamic On-Demand Media ...................81

13.4.6. Playing Live Media ................................81

13.4.7. Playing Live with Recording .......................82

13.4.8. Playing Live with Time-Shift ......................83

13.5. PLAY_NOTIFY ..............................................83

13.5.1. End-of-Stream .....................................84

13.5.2. Media-Properties-Update ...........................86

13.5.3. Scale-Change ......................................87

13.6. PAUSE ....................................................89

13.7. TEARDOWN .................................................92

13.7.1. Client to Server ..................................92

13.7.2. Server to Client ..................................93

13.8. GET_PARAMETER ............................................94

13.9. SET_PARAMETER ............................................96

13.10. REDIRECT ................................................98

14. Embedded (Interleaved) Binary Data ...........................101

15. Proxies ......................................................103

15.1. Proxies and Protocol Extensions .........................104

15.2. Multiplexing and Demultiplexing of Messages .............105

16. Caching ......................................................106

16.1. Validation Model ........................................107

16.1.1. Last-Modified Dates ..............................108

16.1.2. Message Body Tag Cache Validators ................108

16.1.3. Weak and Strong Validators .......................108

16.1.4. Rules for When to Use Message Body Tags

and Last-Modified Dates ..........................

110

16.1.5. Non-validating Conditionals ......................112

16.2. Invalidation after Updates or Deletions .................112

17. Status Code Definitions ......................................113

17.1. Informational 1xx .......................................113

17.1.1. 100 Continue .....................................113

17.2. Success 2xx .............................................113

17.2.1. 200 OK ...........................................113

17.3. Redirection 3xx .........................................113

17.3.1. 300 ..............................................114

17.3.2. 301 Moved Permanently ............................114

17.3.3. 302 Found ........................................114

17.3.4. 303 See Other ....................................115

17.3.5. 304 Not Modified .................................115

17.3.6. 305 Use Proxy ....................................115

17.4. Client Error 4xx ........................................116

17.4.1. 400 Bad Request ..................................116

17.4.2. 401 Unauthorized .................................116

17.4.3. 402 Payment Required .............................116

17.4.4. 403 Forbidden ....................................116

17.4.5. 404 Not Found ....................................116

Schulzrinne, et al. Standards Track [Page 4]

RFC 7826

RTSP 2.0 December 2016

17.4.6. 405 Method Not Allowed ...........................117

17.4.7. 406 Not Acceptable ...............................117

17.4.8. 407 Proxy Authentication Required ................117

17.4.9. 408 Request Timeout ..............................117

17.4.10. 410 Gone ........................................118

17.4.11. 412 Precondition Failed .........................118

17.4.12. 413 Request Message Body Too Large ..............118

17.4.13. 414 Request-URI Too Long ........................118

17.4.14. 415 Unsupported Media Type ......................119

17.4.15. 451 Parameter Not Understood ....................119

17.4.16. 452 Illegal Conference Identifier ...............119

17.4.17. 453 Not Enough Bandwidth ........................119

17.4.18. 454 Session Not Found ...........................119

17.4.19. 455 Method Not Valid in This State ..............119

17.4.20. 456 Header Field Not Valid for Resource .........119

17.4.21. 457 Invalid Range ...............................120

17.4.22. 458 Parameter Is Read-Only ......................120

17.4.23. 459 Aggregate Operation Not Allowed .............120

17.4.24. 460 Only Aggregate Operation Allowed ............120

17.4.25. 461 Unsupported Transport .......................120

17.4.26. 462 Destination Unreachable .....................120

17.4.27. 463 Destination Prohibited ......................120

17.4.28. 464 Data Transport Not Ready Yet ................121

17.4.29. 465 Notification Reason Unknown .................121

17.4.30. 466 Key Management Error ........................121

17.4.31. 470 Connection Authorization Required ...........121

17.4.32. 471 Connection Credentials Not Accepted .........121

17.4.33. 472 Failure to Establish Secure Connection ......121

17.5. Server Error 5xx ........................................122

17.5.1. 500 Internal Server Error ........................122

17.5.2. 501 Not Implemented ..............................122

17.5.3. 502 Bad Gateway ..................................122

17.5.4. 503 Service Unavailable ..........................122

17.5.5. 504 Gateway Timeout ..............................123

17.5.6. 505 RTSP Version Not Supported ...................123

17.5.7. 551 Option Not Supported .........................123

17.5.8. 553 Proxy Unavailable ............................123

18. Header Field Definitions .....................................124

18.1. Accept ..................................................134

18.2. Accept-Credentials ......................................135

18.3. Accept-Encoding .........................................135

18.4. Accept-Language .........................................136

18.5. Accept-Ranges ...........................................137

18.6. Allow ...................................................138

18.7. Authentication-Info .....................................138

18.8. Authorization ...........................................138

18.9. Bandwidth ...............................................139

18.10. Blocksize ..............................................140

Schulzrinne, et al. Standards Track [Page 5]

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