使用librtmp库发布直播流

╰半夏微凉° 2022-06-13 06:59 143阅读 0赞

修改源码原C++改为C

Unix下编译通过(CentOS 6.5)

下载文件会有VC6和Unix两个文件夹

///

rtmp协议与flv封包格式基本相同（本来就是一家公司的嘛）

将flv文件解析出类型，时间戳，数据大小，数据区

对应写的rtmp包的位置进行发送即可

对于非FLV格式，分解出音频帧和视频帧，再封装发送

rtmpdump官网: [http://rtmpdump.mplayerhq.hu/][http_rtmpdump.mplayerhq.hu]

这里是以flv文件做源，可以自己采集视频音频进行实时发送

库版本 2.4

下图，左边发送到服务器，右侧可正常观看（模拟的是实时流，发完该流也就结束了）

![使用rtmp库将flv文件发布直播流 - 幻想少佳 - 幻想少佳的博客][rtmp_flv_ - _ -]

关键函数

RTMP\_EnableWrite**(**rtmp**);**

将rtmp设置可写状态,会发出publish指令,否则是play指令

#include <stdio.h> #include <stdlib.h> #include <string.h> #include <time.h> #include <stdint.h> #ifndef WIN32 #include <unistd.h> #endif #ifndef RTMPDUMP_VERSION #define RTMPDUMP_VERSION "v2.4" #endif #include "librtmp/rtmp_sys.h" #include "librtmp/log.h" /* build in unix gcc -Wall -o sendflvrtmp sendflvrtmp.c -lpthread -Llibrtmp -lrtmp -lssl -lcrypto -lz small head */ /* #ifdef WIN32 #pragma comment(lib,"ws2_32.lib") #pragma comment(lib,"lib/librtmp.lib") #endif */ #define HTON16(x) ((x>>8&0xff)|(x<<8&0xff00)) #define HTON24(x) ((x>>16&0xff)|(x<<16&0xff0000)|(x&0xff00)) #define HTON32(x) ((x>>24&0xff)|(x>>8&0xff00)|\ (x<<8&0xff0000)|(x<<24&0xff000000)) #define HTONTIME(x) ((x>>16&0xff)|(x<<16&0xff0000)|(x&0xff00)|(x&0xff000000)) int ReadU8(uint32_t *u8,FILE*fp); int ReadU16(uint32_t *u16,FILE*fp); int ReadU24(uint32_t *u24,FILE*fp); int ReadU32(uint32_t *u32,FILE*fp); int PeekU8(uint32_t *u8,FILE*fp); int ReadTime(uint32_t *utime,FILE*fp); //RTMP_XXX()返回0表示失败，1表示成功 
    RTMP*rtmp=NULL;//rtmp应用指针 RTMPPacket*packet=NULL;//rtmp包结构 char* rtmpurl="rtmp://192.168.1.101:1935/live/test";//连接的URL char* flvfilename="test.flv";//读取的flv文件 int ZINIT();//初始化相关 void ZCLEAR();//清除相关 int main(){ long start=0; long perframetime=0; long lasttime=0; int bNextIsKey=1;
     RTMP_LogLevel lvl=RTMP_LOGINFO;
     FILE*fp=NULL; if (!ZINIT()){ 
     printf("Init Socket Err\n"); return -1; } /初始化// // RTMP_debuglevel=RTMP_LOGINFO;//信息等级(0-6) RTMP_LogSetLevel(lvl);//设置信息等级 // RTMP_LogSetOutput(FILE*fp);//设置信息输出文件 
     rtmp=RTMP_Alloc();//申请rtmp空间 RTMP_Init(rtmp);//初始化rtmp设置 rtmp->Link.timeout=5;//设置连接超时，单位秒，默认30秒 packet=(RTMPPacket*)malloc(sizeof(RTMPPacket));//创建包 memset(packet,0,sizeof(RTMPPacket));
     RTMPPacket_Alloc(packet,1024*64);//给packet分配数据空间 RTMPPacket_Reset(packet);//重置packet状态 连接// RTMP_SetupURL(rtmp,rtmpurl);//设置url RTMP_EnableWrite(rtmp);//设置可写状态 //连接服务器 if (!RTMP_Connect(rtmp,NULL)){ 
     printf("Connect Err\n");
     ZCLEAR(); return -1; } //创建并发布流(取决于rtmp->Link.lFlags) if (!RTMP_ConnectStream(rtmp,0)){ 
     printf("ConnectStream Err\n");
     ZCLEAR(); return -1; }
     packet->m_hasAbsTimestamp = 0; //绝对时间戳 packet->m_nChannel = 0x04; //通道 packet->m_nInfoField2 = rtmp->m_stream_id;
    
     fp=fopen(flvfilename,"rb"); if (fp==NULL){ 
     printf("Open File:%s Err\n",flvfilename);
     ZCLEAR(); return -1; }
    
     printf("rtmpurl:%s\nflvfile:%s\nsend data ...\n",rtmpurl,flvfilename); 发送数据// fseek(fp,9,SEEK_SET);//跳过前9个字节 fseek(fp,4,SEEK_CUR);//跳过4字节长度 start=time(NULL)-1;
     perframetime=0;//上一帧时间戳 while(TRUE){ 
     uint32_t type=0;//类型 uint32_t datalength=0;//数据长度 uint32_t timestamp=0;//时间戳 uint32_t streamid=0;//流ID uint32_t alldatalength=0;//该帧总长度 if(((time(NULL)-start)<(perframetime/1000))&&bNextIsKey){ //发的太快就等一下 if(perframetime>lasttime){ 
     printf("TimeStamp:%8lu ms\n",perframetime);
     lasttime=perframetime; } #ifdef WIN32 Sleep(1000); #else sleep(1); #endif continue; } if(!ReadU8(&type,fp)) break; if(!ReadU24(&datalength,fp)) break; if(!ReadTime(&timestamp,fp)) break; if(!ReadU24(&streamid,fp)) break; if (type!=0x08&&type!=0x09){ //跳过非音视频桢 fseek(fp,datalength+4,SEEK_CUR); continue; } if(fread(packet->m_body,1,datalength,fp)!=datalength) break;
     packet->m_headerType = RTMP_PACKET_SIZE_MEDIUM; 
     packet->m_nTimeStamp = timestamp; 
     packet->m_packetType=type;
     packet->m_nBodySize=datalength; if (!RTMP_IsConnected(rtmp)){ 
     printf("rtmp is not connect\n"); break; } if (!RTMP_SendPacket(rtmp,packet,0)){ 
     printf("Send Err\n"); break; } if(!ReadU32(&alldatalength,fp)) break;
     perframetime=timestamp; ///判断下一帧是否关键帧 bNextIsKey=0; if(!PeekU8(&type,fp)) break; if(type==0x09){ if(fseek(fp,11,SEEK_CUR)!=0) break; if(!PeekU8(&type,fp)){ break; } if(type==0x17){ 
     bNextIsKey=1; }
     fseek(fp,-11,SEEK_CUR); } }
     printf("\nSend Data Over\n");
     fclose(fp);
     ZCLEAR(); return 0; } int ZINIT(){ #ifdef WIN32 WORD version;
     WSADATA wsaData;
     version=MAKEWORD(2,2); if(WSAStartup(version,&wsaData)!=0){ return 0; } #endif return 1; } void ZCLEAR(){ //释放/ if (rtmp!=NULL){ 
     RTMP_Close(rtmp);//断开连接 RTMP_Free(rtmp);//释放内存 rtmp=NULL; } if (packet!=NULL){ 
     RTMPPacket_Free(packet);//释放内存 free(packet);
     packet=NULL; } /// #ifdef WIN32 WSACleanup(); #endif } int ReadU8(uint32_t *u8,FILE*fp){ if(fread(u8,1,1,fp)!=1) return 0; return 1; } int ReadU16(uint32_t *u16,FILE*fp){ if(fread(u16,2,1,fp)!=1) return 0; *u16=HTON16(*u16); return 1; } int ReadU24(uint32_t *u24,FILE*fp){ if(fread(u24,3,1,fp)!=1) return 0; *u24=HTON24(*u24); return 1; } int ReadU32(uint32_t *u32,FILE*fp){ if(fread(u32,4,1,fp)!=1) return 0; *u32=HTON32(*u32); return 1; } int PeekU8(uint32_t *u8,FILE*fp){ if(fread(u8,1,1,fp)!=1) return 0;
     fseek(fp,-1,SEEK_CUR); return 1; } int ReadTime(uint32_t *utime,FILE*fp){ if(fread(utime,4,1,fp)!=1) return 0; *utime=HTONTIME(*utime); return 1; }

源码下载:(包含所需第三方库和播放器， 需自己开启rtmp服务器)

[http://vdisk.weibo.com/s/unhDlwQMqkzDc][http_vdisk.weibo.com_s_unhDlwQMqkzDc]

私密链接(上面不行用这个)

[http://vdisk.weibo.com/lc/3J8l4RU6iYXhwsXf5pv ][http_vdisk.weibo.com_lc_3J8l4RU6iYXhwsXf5pv]

密码：S24E

Github:

[https://github.com/bener2008/librtmpexample][https_github.com_bener2008_librtmpexample]

[rtmp流媒体编程相关整理2013(crtmpserver,rtmpdump,x264,faac)  ][rtmp_2013_crtmpserver_rtmpdump_x264_faac_]

http://blog.163.com/zhujiatc@126/blog/static/183463820132135378895/

[http_rtmpdump.mplayerhq.hu]: http://rtmpdump.mplayerhq.hu/
[rtmp_flv_ - _ -]: http://img0.ph.126.net/Mt0kWimJ0tp53a7fGiohKg==/6598223154354702498.png
[http_vdisk.weibo.com_s_unhDlwQMqkzDc]: http://vdisk.weibo.com/s/unhDlwQMqkzDc
[http_vdisk.weibo.com_lc_3J8l4RU6iYXhwsXf5pv]: http://vdisk.weibo.com/lc/3J8l4RU6iYXhwsXf5pv
[https_github.com_bener2008_librtmpexample]: https://github.com/bener2008/librtmpexample
[rtmp_2013_crtmpserver_rtmpdump_x264_faac_]: http://blog.163.com/zhujiatc@126/blog/static/1834638201392335213119/