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RTSP 协议中文版.pdf
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实时流协议(RTSP)建立并控制一个或几个时间同步的连续流媒体。尽管连续媒流与控制流有可能交叉,但 RTSP 本身通常并不发送连续媒体流。换言之,RTSP 充当多媒体服务器的网络远程控制。
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RTSP 协议中文版
Network Working Group H. Schulzrinne
Request for Comments: 2326 Columbia U.
Category: Standards Track A. Rao
Netscape
R. Lanphier
RealNetworks
April 1998
翻译: radium 2005.1
实时流协议(RTSP) ( Real Time Streaming Protocol (RTSP) )
备忘录的状态:
本文档讲述了一种 Internet 社区的 Internet 标准跟踪协议,它需要进一步进行讨论和建议以
得到改进。请参考最新版的“Internet 正式协议标准”(STD1)来获得本协议的标准化程度和状
态。本备忘录的发布不受任何限制。
版权声明:
版权为 The Internet Society 所有。所有权利保留。
摘要:
实时流协议(RTSP)是应用层协议,控制实时数据的传送。RTSP 提供了一个可扩展框架,
使实时数据,如音频与视频的受控、点播成为可能。数据源包括现场数据与存储在剪辑中数
据。该协议目的在于控制多个数据发送连接,为选择发送通道,如 UDP、组 播 UDP 与 TCP,
提供途径,并为选择基于 RTP (RFC1889)上传送机制提供方法。
1

目 录:
1 绪论 Introduction.........................................................................................................................6
1.1 目的 Purpose.....................................................................................................................6
1.2 要求 Requirement.............................................................................................................7
1.3 术语 Terminology.............................................................................................................7
1.4 协议特点 Protocol Properties...........................................................................................8
1.5 RTSP扩展 Extending RTSP...............................................................................................9
1.6 操作模式 Overall Operation...........................................................................................9
1.7 RTSP状态 RTSP States..................................................................................................10
1.8 与其他协议关系 Relationship with Other Protocols .....................................................10
2 符号协定 Notational Conventions.............................................................................................11
3 协议参数 Protocol Parameter....................................................................................................12
3.1 RTSP版本 RTSP Version...............................................................................................12
3.2 RTSP URL ........................................................................................................................13
3.3 会议标识 Conference Identifiers............................................................................15
3.4 会话标识Session Identifiers............................................................................................15
3.5 SMPTE 相对时间戳........................................................................................................15
3.6 正常播放时间 Normal Play Time ...................................................................................15
3.7 绝对时间 Absolute Time................................................................................................16
3.8 选择标签 Options Tags...................................................................................................16
3.8.1 用IANA注册新的选择标签 Registering New Option Tags With IANA............17
4 RTSP消息 ....................................................................................................................................17
4.1 消息类型 Message Type.................................................................................................17
4.2 消息报头 Message Headers............................................................................................18
4.3 消息主体 Message Body................................................................................................18
4.4 消息长度 Message Length .............................................................................................19
5 普通报头域 General Header Fields...........................................................................................19
6 请求 Request..............................................................................................................................19
6.1 请求队列 Request Line...................................................................................................20
6.2 请求报头域 Request Header Fields................................................................................20
7 回应 Response ...........................................................................................................................21
7.1 状态行 Status-Line .........................................................................................................21
7.1.1 状态代码和原因分析 Status Code and Reason Phrase.......................................21
7.1.2 回应报头域 Response Header Fields ..................................................................24
8 实体 Entity.................................................................................................................................24
8.1 实体报头域 Entity Header Fields...................................................................................24
8.2 实体主体 Entity Body ....................................................................................................25
9 连接 Connections.......................................................................................................................25
9.1 流水线操作 Pipelining ...................................................................................................25
9.2 可靠性及确认 Reliability and Acknowledgements........................................................26
10 方法定义 Method Definitions .................................................................................................26
10.1 选择 OPTIONS:.............................................................................................................27
10.2 描述DESCRIBE.................................................................................................................28
2

10.3 通告 ANNOUNCE..............................................................................................................29
10.4 建立 SETUP.....................................................................................................................30
10.5 播放 PLAY.......................................................................................................................31
10.6 暂停 PAUSE.....................................................................................................................34
10.7 断开 TEARDOWN..............................................................................................................36
10.8 获取参数 Get_PARAMETER......................................................................................37
10.9 设置参数 SET_PARAMETER.....................................................................................38
10.10 重定向 REDIRECT....................................................................................................39
10.11 录制 RECORD............................................................................................................40
10.12 嵌入二进制数据 Embedded(interleaved) Binary Data..............................................40
11 状态代码定义(Status Code Definitions)..............................................................................42
11.1 成功 2xx(Success 2xx) ..............................................................................................42
11.1.1 存储空间低 250 Low on Storage Space...........................................................42
11.2 重定向(Redirection 3xx) ..........................................................................................43
11.3 客户端错误(Client Error )4xx.................................................................................43
11.3.1 方法不允许 (405 Method Not Allowed) ............................................................43
11.3.2 参数不能理解 (451 Parameter Not Understood)................................................43
11.3.3 会议未找到 (452 Conference Not Found)..........................................................43
11.3.4 带宽不足 (453 Not Enough Bandwidth) ...........................................................44
11.3.5 会话未找到 (454 Session Not Found)...............................................................44
11.3.6 本状态下该方法无效 (455 Method Not Valid in This State)............................44
11.3.7 报头域对资源无效(456 Header Field Not Valid for Resource )........................44
11.3.8 无效范围 (457 Invalid Range)...........................................................................44
11.3.9 参数只读 (458 Parameter Is Read-Only)...........................................................45
11.3.10 不允许合操作(459 Aggregate Operation Not Allowed)...................................45
11.3.11 只允许合操作 (460 Only Aggregate Operation Allowed)...............................45
11.3.12 不支持的传输 (461 Unsupported Transport) ..................................................45
11.3.13 目标不可达 (462 Destination Unreachable)....................................................45
11.3.14 选择不被支持 (551 Option not Supported).....................................................46
12 报头域定义(Header Field Definitions) ...............................................................................46
12.1 接受 Accept..................................................................................................................48
12.2 接受编码 Accept-Encoding..........................................................................................48
12.3 接受语言 Accept-Langue.............................................................................................48
12.4 允许(Allow)..............................................................................................................49
12.5 授权(Authorization)..................................................................................................49
12.6 带宽 Bandwidth............................................................................................................49
12.7 块大小 Blocksize........................................................................................................49
12.8 缓存控制 Cache-Control............................................................................................50
12.9 会议 Conference ...........................................................................................................53
12.10 连接 Connection .........................................................................................................53
12.11 基本内容 Content-Base..............................................................................................53
12.12 内容编码(Content-Encoding).................................................................................53
12.13 内容语言 Content-Language......................................................................................53
12.14 内容长度(Content-Length) ....................................................................................54
3

12.15 内容位置 Content-Location........................................................................................54
12.16 内容类型(Content-Type)........................................................................................54
12.17 序列号 CSeq...............................................................................................................54
12.18 日期(Date) ..............................................................................................................54
12.19 过期Expires .................................................................................................................54
12.20 来自 From...................................................................................................................56
12.21 主机 Host....................................................................................................................56
12.22 如果匹配If-Match .......................................................................................................56
12.23 从何时更改(If-Modified-Since).............................................................................56
12.24 最近更改(Last-Modified).......................................................................................57
12.25 位置(Location) .......................................................................................................57
12.26 代理授权 Proxy-Authenticate ....................................................................................57
12.27 代理要求 Proxy-Require ............................................................................................57
12.28 公用性 public..............................................................................................................57
12.29 范围 Range .................................................................................................................58
12.30 提交方(Referer)......................................................................................................59
12.31 稍后再试 Retry-After.................................................................................................59
12.32 要求 Require...............................................................................................................59
12.33 RTP信息 RTP-Info.......................................................................................................60
12.34 比例 Scale...................................................................................................................61
12.35 速度 Speed..................................................................................................................62
12.36 服务器(Server) .......................................................................................................62
12.37 会话 Session ...............................................................................................................63
12.38 时间戳 Timestamp......................................................................................................63
12.39 传输 Transport ............................................................................................................64
12.40 不支持 Unsupported...................................................................................................68
12.41 用户代理(User-Agent) ...........................................................................................68
12.42 变化..............................................................................................................................68
12.43 通过..............................................................................................................................68
12.44 WWW-授权(WWW-Authenticate)..........................................................................68
13 缓存 50.....................................................................................................................................68
14 实例 Examples.........................................................................................................................70
14.1 要求媒体(单播) Media on Demand (Unicast) ........................................................70
14.2 容器文件的流 Streaming of a Container file ...............................................................73
14.3 单个流容器文件 Single Stream Container Files..........................................................76
14.4 组播现场媒体表示 Live Media Presentation Using Multicast..................................78
14.5 在存在的会话中播放媒体 Playing media into an existing session.............................79
14.6 录制 Recording.............................................................................................................81
15 语法 Syntax .............................................................................................................................83
15.1 基本语法 Base Syntax..................................................................................................83
16 安全考虑(Security Considerations) ....................................................................................84
附录A: RTSP协议状态机 RTSP Protocol State Machines .......................................................88
A.1 客户端状态机 Client State Machine ...........................................................................88
A.2 服务器端状态机 Server State Machine.........................................................................90
4

附录B 同RTP协议的交互 Interaction with RTP..........................................................................92
附录C 使用SDP进行RTSP会话描述 Use of SDP for RTSP Session Descriptions.....................93
C.1 定义Definitions...............................................................................................................94
C.1.1 控制URL Control URL........................................................................................94
C.1.2 媒体流 Media streams.........................................................................................95
C.1.3 有效载荷类型 Payload type(s) ...........................................................................95
C.1.4 详细格式参数 Format-specific parameters ........................................................95
C.1.5 表示的范围 Range of presentation.....................................................................96
C.1.6 有效时间 Time of availability.............................................................................96
C.1.7 连接信息 Connection Information......................................................................96
C.1.8 实体标签 Entity Tag ...........................................................................................97
C.2 合控制不可用 Aggregate Control Not Available ..........................................................97
C.3 合控制可用 Aggregate Control Available .....................................................................98
附录D 最简单的RTSP实现 Appendix D: Minimal RTSP implementation.................................99
D.1 客户端 Client.................................................................................................................99
D.1.1 回放 Basic Playback ..........................................................................................101
D.1.2 授权 Authentication-enabled ............................................................................101
D.2 服务器 Server ..............................................................................................................101
D.2.1 回放 Basic Playback ..........................................................................................102
D.2.2 授权 Authentication-enabled .............................................................................103
附录E 作者地址 Authors' Addresses........................................................................................103
附录F 致谢 Acknowledgements...............................................................................................104
参考书目 References...................................................................................................................105
版权申明 Full Copyright Statement............................................................................................108
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