Detailed interpretation of live555 testOnDemandRTSPServer.cpp

Detailed interpretation of live555 testOnDemandRTSPServer.cpp

Interpretation

Here is a testOnDemandRTSPServersample program called , which demonstrates how to live stream various types of files via the built-in RTSP server in unicast mode. Here are the main parts and functions of the code:

1. Import header files and namespaces :

   #include "liveMedia.hh"
   #include "BasicUsageEnvironment.hh"
   

2. Global variable definition :

   UsageEnvironment* env;
   Boolean reuseFirstSource = False; // 控制是否为每个客户端重用同一输入流
   Boolean iFramesOnly = False; // 控制是否仅流式传输MPEG-1或2视频"I"帧
   

3. Main function :

   int main(int argc, char** argv) {
         
         
       // 创建任务调度器和使用环境
       TaskScheduler* scheduler = BasicTaskScheduler::createNew();
       env = BasicUsageEnvironment::createNew(*scheduler);
   
       // 创建RTSP服务器
       RTSPServer* rtspServer = RTSPServer::createNew(*env, 8554, NULL);
       if (rtspServer == NULL) {
         
         
           *env << "Failed to create RTSP server: " << env->getResultMsg() << "\n";
           exit(1);
       }
   
       // 设置不同类型的流媒体
       // ...
   
       // 创建其他类型的流媒体
       // ...
   
       // 启动RTSP服务器和HTTP隧道
       env->taskScheduler().doEventLoop(); // 不会返回
   
       return 0; // 防止编译器警告
   }
   

4. Set up different types of streaming media : The code contains many blocks, each block is used to set up different types of streaming media, such as MPEG-4 video, H.264 video, H.265 video, MPEG-1 or 2 audio and video, MP3 audio, WAV audio, etc. Each block creates an ServerMediaSessionobject and adds one or more ServerMediaSubsessionobjects to add different media streams to the RTSP server.

5. Create a streaming session : Each block creates an ServerMediaSessionobject that represents a streaming session. A session can contain one or more media subsessions, each subsession representing a specific type of media stream, such as video, audio, etc.

6. Add media subsession : In each streaming session, use addSubsessionthe method to add a media subsession to the session. Each subsession will be instantiated as the appropriate type, such as video subsession, audio subsession, etc.

7. Start RTSP-over-HTTP tunnel : The program attempts to set up RTSP-over-HTTP over an HTTP tunnel to transmit RTSP streams on the HTTP port. Depending on TLS usage, it may try to use the default HTTP port (80) or the TLS HTTP port (443).

8. announceStream function : This function is used to output information about streaming media, such as stream name and input file name.

This sample program demonstrates how to use the classes and methods of the LIVE555 library to set up an RTSP server and transmit different types of media files in real-time streaming. You can customize streaming types and settings according to your needs. If you want to learn more about the functions and usage of the LIVE555 library, it is recommended to consult the LIVE555 official documentation and tutorials.

Notice

When it comes to using the Live555 library for streaming development, the following areas may require additional information:

1. Compile and build : In your development environment, you need to compile and build the Live555 library to generate the required static or dynamic link libraries. Generally, you can perform these steps by following the official guide provided by Live555. Make sure to select the appropriate configuration and platform options when compiling.

2. Input media files : Different streaming sessions in the sample code use different types of media files (such as .m4e, , .264, .265, .mpgetc.). You need to prepare appropriate input media files, or create, obtain, or generate media files according to your needs.

3. RTSP server address and port : In the sample code, the RTSP server uses the default address ( localhost) and port ( 8554). You can change these settings as needed. If you wish to access this server from other devices, you will need to ensure that the network settings are correct.

4. Security settings : There are not many security settings covered in the sample code. If your application requires security, you may need to implement mechanisms such as access control and user authentication to ensure that only authorized users can access streaming media.

5. Error handling and logging : In practical applications, good error handling and logging are crucial. Make sure to add appropriate error checking and handling, as well as detailed logging, to your code to help diagnose and resolve problems.

6. Streaming client : The sample code is an RTSP server for streaming media content. You may also need a streaming client to receive and play this content. In the streaming client, you can use the client class provided by Live555 to achieve this.

7. Protocol support : Live555 library supports multiple streaming media protocols, such as RTSP, RTCP, RTP, etc. Make sure your application is properly configured and set up on supported protocols.

8. Resource Release : At the end of the application, ensure that objects and resources created in the Live555 library are properly released and destroyed to prevent memory leaks and resource waste.

In summary, using the Live555 library for streaming media development requires understanding its core concepts, classes, and methods, as well as how to build, configure, and use the library to implement your application. Official documentation, sample code, and tutorials will be powerful resources for you to learn and master this library.