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RSS订阅转载 C 查找字符在字符串中位置的方法
[cpp] view plaincop/***************************************************************************** * @COPYRIGHT NOTICE * @Copyright (c) 2013, ChenMH * @All rights r
2014-05-27 13:43:45
1830
转载 SIP入门（一）：建立SIP软电话环境
SIP协议学习入门的最快最好的办法就是在PC机上搭建SIP软电话环境，通过抓包软件（如：Wireshark）对数据进行分析学习，这样可以迅速了解熟悉SIP协议，并深入了解通讯会话的流程，从而达到快速入门的目的。 下面就介绍如何搭建SIP软电话环境。 本人使用Yate软件，下载地址为：http://yate.null.ro/pmwiki/index.p
2014-05-24 09:51:11
995
原创 红外驱动-异步通知
看了很多资料，在阻塞io等待红外中断的基础上，添加了异步通知，完美解决主线程不能阻塞的问题。原来的测试程序：#include #include #include #include #include #include #include #include int main(){int fd;if((fd = open("/dev/infrared",
2014-05-03 11:03:42
543
RFC3984协议 H 264 RTP荷载格式
目录
1 介绍 3
1 1 H 264 Codec 3
1 2 参数集概念 4
1 3 网络抽象层单元类型 5
2 约定 6
3 范围 6
4 定义和缩写 6
4 1 定义 6
5 RTP 荷载格式 8
5 1 RTP 头的使用 8
5 2 RTP荷载格式的公共使用 11
5 3 NAL单言字节的用法 12
5 4 打包方式 14
5 5 解码顺序号 DON 15
5 6 单个NAL单元包 18
5 7 复合包 18
5 8 分片单元 FUs 27
6 分包规则 31
6 1 公共分包规则 31
6 2 单个NAL单元方式 32
6 3 非交错方式 32
6 4 交错方式 33
7 打包过程 信息 33
7 1 单NAL单元和非交错方式 33
7 2 交错方式 34
7 3 附加的打包原则 36
8 荷载格式参数 37
8 1 MIME 注册 37
8 2 SDP 参数 52
8 3 例子 58
8 4 参数集考虑 60
9 安全考虑 62
10 拥塞控制 63
11 IANA考虑 64
12 信息化附录: 应用例子 65
12 1 根据ITU T H 241 附录A的视频电话 65
12 2 没有分片数据分区 没有NAL单元聚合的视频电话 65
12 3 使用NAL单元聚合交错打包的视频电话 66
12 4 使用数据分区的视频电话 66
12 5 使用FU和向前纠错的视频电话和流 67
12 6 低位率流 69
12 7 视频流中健壮的包调度 70
13 信息化附录:解码顺序号的原理 71
13 1 介绍 71
13 2 多图像片断交错的例子 71
13 3 健壮包调度的例子 73
13 4 冗余编码片断健壮传输调度的例子 77
13 5 其它设计可能的提醒 77
14 致谢 78
15 参考 78
15 1 标准化参考 78
15 2 参考性的参考 79
作者地址 81
完全版权声明 83">目录
1 介绍 3
1 1 H 264 Codec 3
1 2 参数集概念 4
1 3 网络抽象层单元类型 5
2 约定 6
3 范围 [更多]
2014-05-03
ONVIF_简介
客户端根据 WSDL 描述文档，会生成一个 SOAP 请求消息，该请求会被嵌入在一个HTTP POST请求中，发送到 Web Services 所在的Web 服务器。Web Services 请求处理器解析收到的 SOAP 请求，调用相应的 Web Services。然后再生成相应的 SOAP 应答。Web 服务器得到 SOAP 应答后，会再通过 HTTP应答的方式把信息送回到客户端。
2014-05-03
rtmp规范翻译1.0
实时消息协议---流的分块
版权声明：
版权（c）2009 Adobe系统有限公司。全权所有。
摘要：
本备忘录描述实时消息协议块流。块流是一种应用层协议，主要用于通过一种合适的传输层协议（例如TCP）复用、打包多媒体数据流（音频，视频和交互数据）。
目录：
简介
术语
定义
字节序、对齐和时间格式
消息格式
握手
握手序列
C0 和 S0 格式
C1 和 S1 格式
C2 和 S2 格式
握手示意图
块
块格式
块基本头
块消息头
类型 0
类型 1
类型 2
类型 3
扩展时间格式
示例
示例 1
示例 2
协议控制消息
设置块的大小
关于消息
参考
规范参考
信息参考
致谢
2014-05-03
RTSP 协议中文版
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
2014-05-03
RTSP_Over_HTTP
Tunneling QuickTime RTSP and RTP over HTTP
QuickTime 4 1 adds HTTP to its’ Streaming Transport capabilities The addition of
HTTP streaming allows QuickTime to utilize HTTP RFC 1945 Hypertext Transfer
Protocol 1 0 and RFC 2068 1945 Hypertext Transfer Protocol 1 1 proxies so viewers
behind a firewall can access QuickTime presentations
The HTTP transport is built from two separate HTTP GET and POST requests initiated
by the client The server then binds the connections to form a virtual full duplex
connection
This paper documents the protocol used forming this type of connection and notes
implementation details associated with its use ">Tunneling QuickTime RTSP and RTP over HTTP
QuickTime 4 1 adds HTTP to its’ Streaming Transport capabilities The addition of
HTTP streaming allows QuickTime to utilize HTTP RFC 1945 Hypertext Transfer
Protocol 1 0 and RFC 2068 1945 Hypertext Transfer Protocol 1 1 proxies so viewers
behind a fire [更多]
2014-05-03
移动端流媒体直播
第 1 章 概述..................................................................................................................................... 2
第 2 章 协议..................................................................................................................................... 2
2.1 RTMP ................................................................................................................................... 2
2.2 RTMPT ................................................................................................................................. 2
2.3 RTMPS ................................................................................................................................. 2
2.4 RTMPE ................................................................................................................................. 2
2.5 RTMFP ................................................................................................................................. 2
2.6 RTSP/RTP ............................................................................................................................. 3
2.7 MPEG2-TS ............................................................................................................................ 3
2.8 HLS ....................................................................................................................................... 3
2.9 MMS .................................................................................................................................... 3
2.6 协议对比............................................................................................................................ 4
第 3 章 服务器选型 ......................................................................................................................... 4
3.1 FMS ..................................................................................................................................... 4
3.2 Red5 .................................................................................................................................... 4
3.3 Wowza ................................................................................................................................. 4
3.4 服务器对比以及选型 ........................................................................................................ 5
第 4 章 视频直播方式 ..................................................................................................................... 6
4.1 传统方式............................................................................................................................ 6
4.2 P2P/RTMFP 方式 ................................................................................................................. 7
4.3 问题对比............................................................................................................................ 7
4.4 直播方式解决 .................................................................................................................... 7
第 5 章 技术点 ................................................................................................................................. 8
5.1 客户端对视频处理 ............................................................................................................. 8
5.2 流媒体服务器对客户端的验证 ........................................................................................ 8
5.3 P2P 和 C/S 方式平滑转换 .................................................................................................. 8
5.4 视频服务器存储 ................................................................................................................ 8
第 6 章 参考文献 ............................................................................................................................ 9
2014-05-03
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