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RTSP实例解析

分类： LINUX

2016-02-27 23:19:58

转自：http://www.cnblogs.com/qq78292959/archive/2010/08/12/2077039.html
核心提示：RTSP简介，Real Time Streaming Protocol或者RTSP（实时流媒体协议），是由Real network 和 Netscape共同提出的如何有效地在IP网络上传输流媒体数据的应用层协议。RTSP提供一 种可扩展的框架，使能够提供能控制的，按需传输实时数据，比如音频和视频文件 。
源数据可以包括现场数据的反馈和存贮的文件。RTSP对流媒体提供了诸如暂停，快进等控制，而它本身并不传输数据，RTSP作用相当于流媒体服务器的远程控制。传输数据可以通过传输层的tcp、udp协议，RTSP也提供了基于rtp传输机制的一些有效的方法。 
一. 参考资料      
        1. 《RTSP简单命令》：http://blog.csdn.net/feidragon319/archive/2007/08/14/1742357.aspx 
        2. 
        3. 《RTSP客户端的Java实现》：http://hi.baidu.com/ssyuan/blog/item/566df6defac1dc5094ee37eb.html
二. RTSP的常用命令与解释
       其中C是客户端，S是服务端。
2.1  OPTIONS
       C->S:       OPTION request //询问S有哪些方法可用
       S->C:       OPTION response //S回应信息中包括提供的所有可用方法
      使用举例：
      客户端到服务端： 
OPTIONS rtsp://218.207.101.236:554/mobile/3/67A451E937422331 RTSP/1.0
Cseq: 1
     服务端对OPTIONS的回应：
RTSP/1.0 200 OK
Server: PVSS/1.4.8 (Build/20090111; Platform/Win32; Release/StarValley; )
Cseq: 1
Public: DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE, OPTIONS, ANNOUNCE, RECORD

2.2  DESCRIBE
      C->S:      DESCRIBE request //要求得到S提供的媒体初始化描述信息
      S->C:      DESCRIBE response //S回应媒体初始化描述信息，主要是sdp
     使用举例：
     客户端到服务端：2.4  PLAY
        C->S:      PLAY request //C请求播放
        S->C:      PLAY response //S回应该请求的信息
        客户端到服务端的请求举例:
DESCRIBE rtsp://218.207.101.236:554/mobile/3/67A451E937422331/8jH5QPU5GWS07Ugn.sdp RTSP/1.0
Cseq: 2
      服务端对OPTIONS的回应：
RTSP/1.0 200 OK
Server: PVSS/1.4.8 (Build/20090111; Platform/Win32; Release/StarValley; )
Cseq: 2
Content-length: 421
Date: Mon, 03 Aug 2009 08:21:33 GMT
Expires: Mon, 03 Aug 2009 08:21:33 GMT
Content-Type: application/sdp
x-Accept-Retransmit: our-retransmit
x-Accept-Dynamic-Rate: 1
Content-Base: rtsp://218.207.101.236:554/mobile/3/67A451E937422331/8jH5QPU5GWS07Ugn.sdp/
v=0
o=MediaBox 127992 137813 IN IP4 0.0.0.0
s=RTSP Session
i=Starv Box Live Cast
c=IN IP4 218.207.101.236
t=0 0
a=range:npt=now-
a=control:*
m=video 0 RTP/AVP 96
b=AS:20
a=rtpmap:96 MP4V-ES/1000
a=fmtp:96 profile-level-id=8; config=000001b008000001b5090000010000000120008440fa282c2090a31f; decode_buf=12586
a=range:npt=now-
a=framerate:5
a=framesize:96 176-144
a=cliprect:0,0,144,176
a=control:trackID=1
2.3  SETUP 
        C->S:        SETUP request //设置会话的属性，以及传输模式，提醒S建立会话
        S->C:        SETUP response //S建立会话，返回会话标识符，以及会话相关信息
        客户端到服务端的请求举例：
SETUP rtsp://218.207.101.236:554/mobile/3/67A451E937422331/8jH5QPU5GWS07Ugn.sdp/trackID=1
 RTSP/1.0
Cseq: 3
Transport: RTP/AVP;UNICAST;client_port=16264-16265;mode=play
       服务端对客户端的回应举例：
RTSP/1.0 200 OK
Server: PVSS/1.4.8 (Build/20090111; Platform/Win32; Release/StarValley; )
Cseq: 3
Session: 26633092229589
Date: Mon, 03 Aug 2009 08:21:33 GMT
Expires: Mon, 03 Aug 2009 08:21:33 GMT
Transport: RTP/AVP;UNICAST;mode=play;client_port=16264-16265;server_port=20026-20027
 
PLAY rtsp://218.207.101.236:554/mobile/3/67A451E937422331/8jH5QPU5GWS07Ugn.sdp RTSP/1.0
Session: 26633092229589
Cseq: 4
       服务端对客户端的回应举例：
RTSP/1.0 200 OK
Server: PVSS/1.4.8 (Build/20090111; Platform/Win32; Release/StarValley; )
Cseq: 4
Session: 26633092229589
RTP-Info: url=rtsp://218.207.101.236:554/mobile/3/67A451E937422331/8jH5QPU5GWS07Ugn.sdp/trackID=1;seq=0;rtptime=0
2.5  PAUSE
        C->S:      PAUSE request //C请求暂停播放
        S->C:      PAUSE response //S回应该请求的信息
        客户端到服务端的请求举例:
PAUSE rtsp://218.207.101.236:554/mobile/3/67A451E937422331/8jH5QPU5GWS07Ugn.sdp/ RTSP/1.0
Cseq: 5
Session: 26633092229589
       服务端对客户端的回应举例：
RTSP/1.0 200 OK
Server: PVSS/1.4.8 (Build/20090111; Platform/Win32; Release/StarValley; )
Cseq: 5
Session: 26633092229589
2.6  TEARDOWN 
        C->S:        TEARDOWN request //C请求关闭会话
        S->C:        TEARDOWN response //S回应该请求
        客户端到服务端的请求举例:
TEARDOWN rtsp://218.207.101.236:554/mobile/3/67A451E937422331/8jH5QPU5GWS07Ugn.sdp/ RTSP/1.0
Cseq: 6
User-Agent: RealMedia Player HelixDNAClient/10.0.0.11279 (win32)
Session: 26633092229589
       服务端对客户端的回应举例：
RTSP/1.0 200 OK
Server: PVSS/1.4.8 (Build/20090111; Platform/Win32; Release/StarValley; )
Cseq: 6
Session: 26633092229589
Connection: Close
三. RTSP客户端的Java实现
3.1  接口IEvent.java

点击(此处)折叠或打开

  1. package com.amigo.rtsp;
  2. import java.io.IOException;
  3. import java.nio.channels.SelectionKey;
  4. /** *//**
  5. * IEvent.java 网络事件处理器，当Selector可以进行操作时，调用这个接口中的方法.
  6. * 2007-3-22 下午03:35:51
  7. * @author sycheng
  8. * @version 1.0
  9. */
  10. public interface IEvent {
  11.     /** *//**
  12.     * 当channel得到connect事件时调用这个方法.
  13.     * @param key
  14.     * @throws IOException
  15.     */
  16.     void connect(SelectionKey key) throws IOException;
  17.     /** *//**
  18.     * 当channel可读时调用这个方法.
  19.     * @param key
  20.     * @throws IOException
  21.     */
  22.     void read(SelectionKey key) throws IOException;
  23.     /** *//**
  24.     * 当channel可写时调用这个方法.
  25.     * @throws IOException
  26.     */
  27.     void write() throws IOException;
  28.     /** *//**
  29.     * 当channel发生错误时调用.
  30.     * @param e
  31.     */
  32.     void error(Exception e);
  33. }
3.2  RTSP的测试类：RTSPClient.java

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  1. package com.amigo.rtsp;
  2. import java.io.IOException;
  3. import java.net.InetSocketAddress;
  4. import java.nio.ByteBuffer;
  5. import java.nio.channels.SelectionKey;
  6. import java.nio.channels.Selector;
  7. import java.nio.channels.SocketChannel;
  8. import java.util.Iterator;
  9. import java.util.concurrent.atomic.AtomicBoolean;
  10. public class RTSPClient extends Thread implements IEvent {
  11.     private static final String VERSION = " RTSP/1.0\r\n";
  12.     private static final String RTSP_OK = "RTSP/1.0 200 OK";
  13.     /** *//** 远程地址 */
  14.     private final InetSocketAddress remoteAddress;
  15.     /** *//** * 本地地址 */
  16.     private final InetSocketAddress localAddress;
  17.     /** *//** * 连接通道 */
  18.     private SocketChannel socketChannel;
  19.     /** *//** 发送缓冲区 */
  20.     private final ByteBuffer sendBuf;
  21.     /** *//** 接收缓冲区 */
  22.     private final ByteBuffer receiveBuf;
  23.     private static final int BUFFER_SIZE = 8192;
  24.     /** *//** 端口选择器 */
  25.     private Selector selector;
  26.     private String address;
  27.     private Status sysStatus;
  28.     private String sessionid;
  29.     /** *//** 线程是否结束的标志 */
  30.     private AtomicBoolean shutdown;
  31.     
  32.     private int seq=1;
  33.     
  34.     private boolean isSended;
  35.     
  36.     private String trackInfo;
  37.     
  38.     private enum Status {
  39.         init, options, describe, setup, play, pause, teardown
  40.     }
  41.     public RTSPClient(InetSocketAddress remoteAddress,
  42.             InetSocketAddress localAddress, String address) {
  43.         this.remoteAddress = remoteAddress;
  44.         this.localAddress = localAddress;
  45.         this.address = address;
  46.         // 初始化缓冲区
  47.         sendBuf = ByteBuffer.allocateDirect(BUFFER_SIZE);
  48.         receiveBuf = ByteBuffer.allocateDirect(BUFFER_SIZE);
  49.         if (selector == null) {
  50.             // 创建新的Selector
  51.             try {
  52.                 selector = Selector.open();
  53.             } catch (final IOException e) {
  54.                 e.printStackTrace();
  55.             }
  56.         }
  57.         startup();
  58.         sysStatus = Status.init;
  59.         shutdown=new AtomicBoolean(false);
  60.         isSended=false;
  61.     }
  62.     public void startup() {
  63.         try {
  64.             // 打开通道
  65.             socketChannel = SocketChannel.open();
  66.             // 绑定到本地端口
  67.             socketChannel.socket().setSoTimeout(30000);
  68.             socketChannel.configureBlocking(false);
  69.             socketChannel.socket().bind(localAddress);
  70.             if (socketChannel.connect(remoteAddress)) {
  71.                 System.out.println("开始建立连接:" + remoteAddress);
  72.             }
  73.             socketChannel.register(selector, SelectionKey.OP_CONNECT
  74.                     | SelectionKey.OP_READ | SelectionKey.OP_WRITE, this);
  75.             System.out.println("端口打开成功");
  76.         } catch (final IOException e1) {
  77.             e1.printStackTrace();
  78.         }
  79.     }
  80.     public void send(byte[] out) {
  81.         if (out == null || out.length < 1) {
  82.             return;
  83.         }
  84.         synchronized (sendBuf) {
  85.             sendBuf.clear();
  86.             sendBuf.put(out);
  87.             sendBuf.flip();
  88.         }
  89.         // 发送出去
  90.         try {
  91.             write();
  92.             isSended=true;
  93.         } catch (final IOException e) {
  94.             e.printStackTrace();
  95.         }
  96.     }
  97.     public void write() throws IOException {
  98.         if (isConnected()) {
  99.             try {
  100.                 socketChannel.write(sendBuf);
  101.             } catch (final IOException e) {
  102.             }
  103.         } else {
  104.             System.out.println("通道为空或者没有连接上");
  105.         }
  106.     }
  107.     public byte[] recieve() {
  108.         if (isConnected()) {
  109.             try {
  110.                 int len = 0;
  111.                 int readBytes = 0;
  112.                 synchronized (receiveBuf) {
  113.                     receiveBuf.clear();
  114.                     try {
  115.                         while ((len = socketChannel.read(receiveBuf)) > 0) {
  116.                             readBytes += len;
  117.                         }
  118.                     } finally {
  119.                         receiveBuf.flip();
  120.                     }
  121.                     if (readBytes > 0) {
  122.                         final byte[] tmp = new byte[readBytes];
  123.                         receiveBuf.get(tmp);
  124.                         return tmp;
  125.                     } else {
  126.                         System.out.println("接收到数据为空,重新启动连接");
  127.                         return null;
  128.                     }
  129.                 }
  130.             } catch (final IOException e) {
  131.                 System.out.println("接收消息错误:");
  132.             }
  133.         } else {
  134.             System.out.println("端口没有连接");
  135.         }
  136.         return null;
  137.     }
  138.     public boolean isConnected() {
  139.         return socketChannel != null && socketChannel.isConnected();
  140.     }
  141.     private void select() {
  142.         int n = 0;
  143.         try {
  144.             if (selector == null) {
  145.                 return;
  146.             }
  147.             n = selector.select(1000);
  148.         } catch (final Exception e) {
  149.             e.printStackTrace();
  150.         }
  151.         // 如果select返回大于0，处理事件
  152.         if (n > 0) {
  153.             for (final Iterator<SelectionKey> i = selector.selectedKeys()
  154.                     .iterator(); i.hasNext();) {
  155.                 // 得到下一个Key
  156.                 final SelectionKey sk = i.next();
  157.                 i.remove();
  158.                 // 检查其是否还有效
  159.                 if (!sk.isValid()) {
  160.                     continue;
  161.                 }
  162.                 // 处理事件
  163.                 final IEvent handler = (IEvent) sk.attachment();
  164.                 try {
  165.                     if (sk.isConnectable()) {
  166.                         handler.connect(sk);
  167.                     } else if (sk.isReadable()) {
  168.                         handler.read(sk);
  169.                     } else {
  170.                         // System.err.println("Ooops");
  171.                     }
  172.                 } catch (final Exception e) {
  173.                     handler.error(e);
  174.                     sk.cancel();
  175.                 }
  176.             }
  177.         }
  178.     }
  179.     public void shutdown() {
  180.         if (isConnected()) {
  181.             try {
  182.                 socketChannel.close();
  183.                 System.out.println("端口关闭成功");
  184.             } catch (final IOException e) {
  185.                 System.out.println("端口关闭错误:");
  186.             } finally {
  187.                 socketChannel = null;
  188.             }
  189.         } else {
  190.             System.out.println("通道为空或者没有连接");
  191.         }
  192.     }
  193.     @Override
  194.     public void run() {
  195.         // 启动主循环流程
  196.         while (!shutdown.get()) {
  197.             try {
  198.                 if (isConnected()&&(!isSended)) {
  199.                     switch (sysStatus) {
  200.                     case init:
  201.                         doOption();
  202.                         break;
  203.                     case options:
  204.                         doDescribe();
  205.                         break;
  206.                     case describe:
  207.                         doSetup();
  208.                         break;
  209.                     case setup:
  210.                         if(sessionid==null&&sessionid.length()>0){
  211.                             System.out.println("setup还没有正常返回");
  212.                         }else{
  213.                             doPlay();
  214.                         }
  215.                         break;
  216.                     case play:
  217.                         doPause();
  218.                         break;
  219.                         
  220.                     case pause:
  221.                         doTeardown();
  222.                         break;
  223.                     default:
  224.                         break;
  225.                     }
  226.                 }
  227.                 // do select
  228.                 select();
  229.                 try {
  230.                     Thread.sleep(1000);
  231.                 } catch (final Exception e) {
  232.                 }
  233.             } catch (final Exception e) {
  234.                 e.printStackTrace();
  235.             }
  236.         }
  237.         
  238.         shutdown();
  239.     }
  240.     public void connect(SelectionKey key) throws IOException {
  241.         if (isConnected()) {
  242.             return;
  243.         }
  244.         // 完成SocketChannel的连接
  245.         socketChannel.finishConnect();
  246.         while (!socketChannel.isConnected()) {
  247.             try {
  248.                 Thread.sleep(300);
  249.             } catch (final InterruptedException e) {
  250.                 e.printStackTrace();
  251.             }
  252.             socketChannel.finishConnect();
  253.         }
  254.     }
  255.     public void error(Exception e) {
  256.         e.printStackTrace();
  257.     }
  258.     public void read(SelectionKey key) throws IOException {
  259.         // 接收消息
  260.         final byte[] msg = recieve();
  261.         if (msg != null) {
  262.             handle(msg);
  263.         } else {
  264.             key.cancel();
  265.         }
  266.     }
  267.     private void handle(byte[] msg) {
  268.         String tmp = new String(msg);
  269.         System.out.println("返回内容：");
  270.         System.out.println(tmp);
  271.         if (tmp.startsWith(RTSP_OK)) {
  272.             switch (sysStatus) {
  273.             case init:
  274.                 sysStatus = Status.options;
  275.                 break;
  276.             case options:
  277.                 sysStatus = Status.describe;
  278.                 trackInfo=tmp.substring(tmp.indexOf("trackID"));
  279.                 break;
  280.             case describe:
  281.                 sessionid = tmp.substring(tmp.indexOf("Session: ") + 9, tmp
  282.                         .indexOf("Date:"));
  283.                 if(sessionid!=null&&sessionid.length()>0){
  284.                     sysStatus = Status.setup;
  285.                 }
  286.                 break;
  287.             case setup:
  288.                 sysStatus = Status.play;
  289.                 break;
  290.             case play:
  291.                 sysStatus = Status.pause;
  292.                 break;
  293.             case pause:
  294.                 sysStatus = Status.teardown;
  295.                 shutdown.set(true);
  296.                 break;
  297.             case teardown:
  298.                 sysStatus = Status.init;
  299.                 break;
  300.             default:
  301.                 break;
  302.             }
  303.             isSended=false;
  304.         } else {
  305.             System.out.println("返回错误：" + tmp);
  306.         }
  307.     }
  308.     private void doTeardown() {
  309.         StringBuilder sb = new StringBuilder();
  310.         sb.append("TEARDOWN ");
  311.         sb.append(this.address);
  312.         sb.append("/");
  313.         sb.append(VERSION);
  314.         sb.append("Cseq: ");
  315.         sb.append(seq++);
  316.         sb.append("\r\n");
  317.         sb.append("User-Agent: RealMedia Player HelixDNAClient/10.0.0.11279 (win32)\r\n");
  318.         sb.append("Session: ");
  319.         sb.append(sessionid);
  320.         sb.append("\r\n");
  321.         send(sb.toString().getBytes());
  322.         System.out.println(sb.toString());
  323.     }
  324.     private void doPlay() {
  325.         StringBuilder sb = new StringBuilder();
  326.         sb.append("PLAY ");
  327.         sb.append(this.address);
  328.         sb.append(VERSION);
  329.         sb.append("Session: ");
  330.         sb.append(sessionid);
  331.         sb.append("Cseq: ");
  332.         sb.append(seq++);
  333.         sb.append("\r\n");
  334.         sb.append("\r\n");
  335.         System.out.println(sb.toString());
  336.         send(sb.toString().getBytes());
  337.     }
  338.     private void doSetup() {
  339.         StringBuilder sb = new StringBuilder();
  340.         sb.append("SETUP ");
  341.         sb.append(this.address);
  342.         sb.append("/");
  343.         sb.append(trackInfo);
  344.         sb.append(VERSION);
  345.         sb.append("Cseq: ");
  346.         sb.append(seq++);
  347.         sb.append("\r\n");
  348.         sb.append("Transport: RTP/AVP;UNICAST;client_port=16264-16265;mode=play\r\n");
  349.         sb.append("\r\n");
  350.         System.out.println(sb.toString());
  351.         send(sb.toString().getBytes());
  352.     }
  353.     private void doOption() {
  354.         StringBuilder sb = new StringBuilder();
  355.         sb.append("OPTIONS ");
  356.         sb.append(this.address.substring(0, address.lastIndexOf("/")));
  357.         sb.append(VERSION);
  358.         sb.append("Cseq: ");
  359.         sb.append(seq++);
  360.         sb.append("\r\n");
  361.         sb.append("\r\n");
  362.         System.out.println(sb.toString());
  363.         send(sb.toString().getBytes());
  364.     }
  365.     private void doDescribe() {
  366.         StringBuilder sb = new StringBuilder();
  367.         sb.append("DESCRIBE ");
  368.         sb.append(this.address);
  369.         sb.append(VERSION);
  370.         sb.append("Cseq: ");
  371.         sb.append(seq++);
  372.         sb.append("\r\n");
  373.         sb.append("\r\n");
  374.         System.out.println(sb.toString());
  375.         send(sb.toString().getBytes());
  376.     }
  377.     
  378.     private void doPause() {
  379.         StringBuilder sb = new StringBuilder();
  380.         sb.append("PAUSE ");
  381.         sb.append(this.address);
  382.         sb.append("/");
  383.         sb.append(VERSION);
  384.         sb.append("Cseq: ");
  385.         sb.append(seq++);
  386.         sb.append("\r\n");
  387.         sb.append("Session: ");
  388.         sb.append(sessionid);
  389.         sb.append("\r\n");
  390.         send(sb.toString().getBytes());
  391.         System.out.println(sb.toString());
  392.     }
  393.     
  394.     public static void main(String[] args) {
  395.         try {
  396.             // RTSPClient(InetSocketAddress remoteAddress,
  397.             // InetSocketAddress localAddress, String address)
  398.             RTSPClient client = new RTSPClient(
  399.                     new InetSocketAddress("218.207.101.236", 554),
  400.                     new InetSocketAddress("192.168.2.28", 0),
  401.                     "rtsp://218.207.101.236:554/mobile/3/67A451E937422331/8jH5QPU5GWS07Ugn.sdp");
  402.             client.start();
  403.         } catch (Exception e) {
  404.             e.printStackTrace();
  405.         }
  406.     }
  407. }

其中:rtsp://218.207.101.236:554/mobile/3/67A451E937422331/8jH5QPU5GWS07Ugn.sdp为我在网上找到的一个rtsp的sdp地址,读者可自行更换,RTSP的默认端口为554.
3.3  运行结果
       运行RTSPClient.java,运行结果如下所示:

点击(此处)折叠或打开

  1. 端口打开成功
  2. OPTIONS rtsp://218.207.101.236:554/mobile/3/67A451E937422331 RTSP/1.0
  3. Cseq: 1

  5. 返回内容：
  6. RTSP/1.0 200 OK
  7. Server: PVSS/1.4.8 (Build/20090111; Platform/Win32; Release/StarValley; )
  8. Cseq: 1
  9. Public: DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE, OPTIONS, ANNOUNCE, RECORD

  11. DESCRIBE rtsp://218.207.101.236:554/mobile/3/67A451E937422331/8jH5QPU5GWS07Ugn.sdp RTSP/1.0
  12. Cseq: 2

  14. 返回内容：
  15. RTSP/1.0 200 OK
  16. Server: PVSS/1.4.8 (Build/20090111; Platform/Win32; Release/StarValley; )
  17. Cseq: 2
  18. Content-length: 421
  19. Date: Mon, 03 Aug 2009 08:50:36 GMT
  20. Expires: Mon, 03 Aug 2009 08:50:36 GMT
  21. Content-Type: application/sdp
  22. x-Accept-Retransmit: our-retransmit
  23. x-Accept-Dynamic-Rate: 1
  24. Content-Base: rtsp://218.207.101.236:554/mobile/3/67A451E937422331/8jH5QPU5GWS07Ugn.sdp/
  25. v=0
  26. o=MediaBox 127992 137813 IN IP4 0.0.0.0
  27. s=RTSP Session
  28. i=Starv Box Live Cast
  29. c=IN IP4 218.207.101.236
  30. t=0 0
  31. a=range:npt=now-
  32. a=control:*
  33. m=video 0 RTP/AVP 96
  34. b=AS:20
  35. a=rtpmap:96 MP4V-ES/1000
  36. a=fmtp:96 profile-level-id=8; config=000001b008000001b5090000010000000120008440fa282c2090a31f; decode_buf=12586
  37. a=range:npt=now-
  38. a=framerate:5
  39. a=framesize:96 176-144
  40. a=cliprect:0,0,144,176
  41. a=control:trackID=1
  42. SETUP rtsp://218.207.101.236:554/mobile/3/67A451E937422331/8jH5QPU5GWS07Ugn.sdp/trackID=1
  43.  RTSP/1.0
  44. Cseq: 3
  45. Transport: RTP/AVP;UNICAST;client_port=16264-16265;mode=play

  47. 返回内容：
  48. RTSP/1.0 200 OK
  49. Server: PVSS/1.4.8 (Build/20090111; Platform/Win32; Release/StarValley; )
  50. Cseq: 3
  51. Session: 15470472221769
  52. Date: Mon, 03 Aug 2009 08:50:36 GMT
  53. Expires: Mon, 03 Aug 2009 08:50:36 GMT
  54. Transport: RTP/AVP;UNICAST;mode=play;client_port=16264-16265;server_port=20080-20081

  56. PLAY rtsp://218.207.101.236:554/mobile/3/67A451E937422331/8jH5QPU5GWS07Ugn.sdp RTSP/1.0
  57. Session: 15470472221769
  58. Cseq: 4

  60. 返回内容：
  61. RTSP/1.0 200 OK
  62. Server: PVSS/1.4.8 (Build/20090111; Platform/Win32; Release/StarValley; )
  63. Cseq: 4
  64. Session: 15470472221769
  65. RTP-Info: url=rtsp://218.207.101.236:554/mobile/3/67A451E937422331/8jH5QPU5GWS07Ugn.sdp/trackID=1;seq=0;rtptime=0

  67. PAUSE rtsp://218.207.101.236:554/mobile/3/67A451E937422331/8jH5QPU5GWS07Ugn.sdp/ RTSP/1.0
  68. Cseq: 5
  69. Session: 15470472221769

  71. 返回内容：
  72. RTSP/1.0 200 OK
  73. Server: PVSS/1.4.8 (Build/20090111; Platform/Win32; Release/StarValley; )
  74. Cseq: 5
  75. Session: 15470472221769

  77. TEARDOWN rtsp://218.207.101.236:554/mobile/3/67A451E937422331/8jH5QPU5GWS07Ugn.sdp/ RTSP/1.0
  78. Cseq: 6
  79. User-Agent: RealMedia Player HelixDNAClient/10.0.0.11279 (win32)
  80. Session: 15470472221769

  82. 返回内容：
  83. RTSP/1.0 200 OK
  84. Server: PVSS/1.4.8 (Build/20090111; Platform/Win32; Release/StarValley; )
  85. Cseq: 6
  86. Session: 15470472221769
  87. Connection: Close

  89. 端口关闭成功



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