使用librtmp库发布直播流
转自：http://blog.163.com/zhujiatc@126/blog/static/183463820132135378895/
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
rtmpdump官网: 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）
#include
#include
#include
#include "librtmp/rtmp_sys.h"
#include "librtmp/log.h"
#pragma comment(lib,"ws2_32.lib")
#pragma comment(lib,"lib/librtmp.lib")
#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))
bool Read8(int &i8,FILE*fp);
bool Read16(int &i16,FILE*fp);
bool Read24(int &i24,FILE*fp);
bool Read32(int &i32,FILE*fp);
bool Peek8(int &i8,FILE*fp);
bool ReadTime(int &itime,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://127.0.0.1:1935/live/test";//连接的URL
char* flvfile="test.flv";//读取的flv文件
bool ZINIT();//初始化相关
void ZCLEAR();//清除相关
int main()
{
if (!ZINIT())
{
printf("init socket err\n");
return -1;
}
/初始化//
//
RTMP_debuglevel=RTMP_LOGINFO;//信息等级(0-6)
限
2.3版以前使用
RTMP_LogLevel lvl=RTMP_LOGINFO;
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=new RTMPPacket();//创建包
RTMPPacket_Alloc(packet,1024*64);//给packet分配数据空间，
要满足最长的帧，不知道可设大些
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
if (!RTMP_Connect(rtmp,NULL))//连接服务器
{
printf("connect err\n");
ZCLEAR();
return -1;
}
if (!RTMP_ConnectStream(rtmp,0))//创建并发布流(取决于rtmp->Link.lFlags)
{
printf("ConnectStreamerr\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;
FILE*fp=fopen(flvfile,"rb");
if (fp==NULL)
{
printf("open file:%s err\n",flvfile);
ZCLEAR();
return -1;
}
printf("rtmpurl:%s\nflvfile:%s\nsend data ...\n",rtmpurl,flvfile);
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
long start=clock()-1000;
long perframetime=0;//上一帧时间戳
while(TRUE)
{
if((clock()-start)
{
Sleep(500);
continue;
}
int type=0;//类型
int datalength=0;//数据长度
int time=0;//时间戳
int streamid=0;//流ID
if(!Read8(type,fp))
break;
if(!Read24(datalength,fp))
break;
if(!ReadTime(time,fp))
break;
if(!Read24(streamid,fp))
break;
if (type!=0x08&&type!=0x09)
{
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 = time;
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;
}
int alldatalength=0;//该帧总长度
if(!Read32(alldatalength,fp))
break;
perframetime=time;
}
printf("send data over\n");
fclose(fp);
ZCLEAR();
return 0;
}
bool ZINIT()
{
WORD version;
WSADATA wsaData;
version=MAKEWORD(2,2);
if(WSAStartup(version,&wsaData)!=0)
{
return FALSE;
}
return TRUE;
}
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
delete packet;
packet=NULL;
}
///
WSACleanup();
}
bool Read8(int &i8,FILE*fp)
{
if(fread(&i8,1,1,fp)!=1)
return false;
return true;
}
bool Read16(int &i16,FILE*fp)
{
if(fread(&i16,2,1,fp)!=1)
return false;
i16=HTON16(i16);
return true;
}
bool Read24(int &i24,FILE*fp)
{
if(fread(&i24,3,1,fp)!=1)
return false;
i24=HTON24(i24);
return true;
}
bool Read32(int &i32,FILE*fp)
{
if(fread(&i32,4,1,fp)!=1)
return false;
i32=HTON32(i32);
return true;
}
bool Peek8(int &i8,FILE*fp)
{
if(fread(&i8,1,1,fp)!=1)
return false;
fseek(fp,-1,SEEK_CUR);
return true;
}
bool ReadTime(int &itime,FILE*fp)
{
int temp=0;
if(fread(&temp,4,1,fp)!=1)
return false;
itime=HTON24(temp);
itime|=(temp&0xff000000);
return true;
}
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/unhDlwQMVR3Fv