live555增强版--支持串流mp4格式

live555目前最新版（0.75）的mediaServer只支持".m4e"格式的Elementary Stream fie，但并不支持串流mp4封装格式的文件，要串流mp4格式的文件一般都是结合FFmpeg进行，但是代码量稍大，这里使用一种较为简单的方法实现对mp4封装格式文件的串流。

其具体思路如下图：

即我们预先对mp4文件进行处理，解析出各个流，并单独存储它们（解析工具用'mp4creator -extract='），然后将解析出来的H.264文件再进行串流处理（最新版的live555支持H.264的串流），客户端可用VLC或者FFmpeg的ffplay进行串流播放。

具体实现为只需在DynamicRTSPServer.cpp文件中添加如下实现代码：

 else if((strcmp(extension, ".mp4") == 0) || (strcmp(extension, ".m4v") == 0))
   {
         NEW_SMS("MPEG-4 Video/Audio");
         // get the info about file
         char * command = (char *) malloc(150 * sizeof (char));
         memset(command,0,150*sizeof(char));
         command = strcat(command, "mp4info  ");
         command = strcat(command, fileName);
         command = strcat(command, " >temp ");
         puts(command);
         system(command);
         /////////////////////////////parsing code/////////////////////////////////////////////
         FILE * fTemp = fopen("temp", "r"),*temp = NULL;
         if (fTemp != NULL)
         {
             char c, ext[4];
             ext[0] = '.';
             ext[1] = 't';
             ext[3] = '\0';
             char * Word = (char *) malloc(100 * sizeof (char));
             memset(Word,0,100 * sizeof(char));
             int flagLine = 0, lineCount = 0, flagWord = 0, wordCount = 0, i = 0, flagCodec = 0, streamCount = 1;
             while (!feof(fTemp))
             {
                 if (lineCount != 3)
                 {
                     c = getc(fTemp);
                 }
                 if (flagLine == 1)
                 {
                     flagLine = 0;
                     if ((c > 48) && (c < 59)) {// get inside the stream numbers only ...
                         flagWord = 1;
                         while ((c != '\n') && (!feof(fTemp)))
                         {
                             c = getc(fTemp);
                             if (flagWord == 1)
                             {
                                 i = 0;
                                 while ((c != ' ') && (c != '\t') && (!feof(fTemp)))
                                 {
                                     Word[i] = tolower(c);
                                     i++;
                                     c = getc(fTemp);
                                 }
                                 Word[i] = '\0';

                                 if ((strcmp("video", Word) == 0) || (strcmp("audio", Word) == 0))
                                 {
                                     flagCodec = 1;
                                     wordCount = 0;
                                     int i;
                                     for (i = 0; i < 100; i++)
                                     {
                                         Word[i] = '\n';
                                     }
                                     ext[2] = '0' + streamCount;
                                     strcpy(Word, "mp4creator -extract=");
                                     Word[20] = streamCount + 48;
                                     Word[21] = ' ';
                                     Word[22] = '\0';
                                     Word = strcat(Word,fileName);
                                     puts(Word);

                                     command = strcpy(command, fileName);
                                     command = strcat(command, ext);
                                     temp = fopen(command,"r");
                                     if(temp == NULL)
                                     {
                                         env<< "creating files";
                                         system(Word);
                                     }
                                     puts(command);
                                     streamCount++;
                                 }
                                 if ((flagCodec == 1) && (wordCount == 1))
                                 {
                                     if (strcmp("h264", Word) == 0)
                                     {
                                     //    printf("error cant play H.264 files.");
                                     //    return 0;
                                            NEW_SMS("H.264 Video");
                                            OutPacketBuffer::maxSize = 100000; // allow for some possibly large H.264 frames
                                            sms->addSubsession(H264VideoFileServerMediaSubsession::createNew(env, command, reuseSource));
                                     }
                                 }
                                 if ((flagCodec == 1) && (wordCount == 2))
                                 {
                                     flagCodec = 0;
                                     printf("Flagged - %s  line: %d\n", Word, lineCount);
                                     ///////////////////////////////enter the code here////////////////////////////////
                                     if (strcmp("aac", Word) == 0)
                                     {
                                         puts("aac found");
                                         sms->addSubsession(ADTSAudioFileServerMediaSubsession
                                                 ::createNew(env, command, reuseSource));
                                         puts(ext);
                                     } else if (strcmp("simple", Word) == 0)
                                     {
                                         puts("m4e found");
                                         sms->addSubsession(MPEG4VideoFileServerMediaSubsession
                                                 ::createNew(env,command, reuseSource));
                                         puts(ext);
                                     } else if (strcmp("h264", Word) == 0)
                                     {
                                         puts("m4e found");
                                         puts(ext);
                                     } else if (strcmp("amr", Word) == 0)
                                     {
                                         puts("amr found");
                                         puts(ext);
                                     }
                                 }
                                 flagWord = 0; ////////// the word flag is reset
                             }
                             if ((c == '\t') || (c == ' '))
                             {
                                 wordCount++;
                                 flagWord = 1; // the word flag set for getting next word.
                             }
                         }
                         flagWord = 0;
                         wordCount = 0;
                         goto out;
                     }
                 }
 out:
                 if (c == '\n')
                 {
                     lineCount++;
                     if (lineCount > 2)
                     {
                         flagLine = 1;
                     }
                 }

             }

         } else
         {
             printf("the file not found");
             return 0;
         }
     }

 

参考代码：http://sourceforge.net/projects/live555mp4/

附：

1.上述代码中用到两个工具程序mp4info.exe和mp4creator.exe，下载地址为：

http://download.csdn.net/detail/c_m_deng/4625514，http://download.csdn.net/detail/c_m_deng/4625522

2.关于live555最新版（2012.10.04）的下载地址及VC++6.0编译参考前一篇文章