EasyRTMP实现对接海康、大华等IPCamera SDK进行RTMP推送直播功能

本文转自EasyDarwin团队Kim的博客：http://blog.csdn.net/jinlong0603

Demo项目介绍

EasyRTMP Demo代码下载地址https://github.com/EasyDarwin/EasyRTMP

本文介绍Demo中EasyRTMP_SDK的项目。该项目是通过调用IP Camera自己的SDK获取到音视频流，然后通过libEasyRTMP推送到RTMP服务器进行直播。这样就可以将普通的不支持RTMP的IP Camera接入RTMP服务器进行直播推送。该Demo程序可以交叉编译内置到IP Camera内部，或者在Windows或者其他系统中执行此Demo拉取IP Camera的数据流再推送到RTMP服务器。

Github中Demo里面用的IP Camera的SDK是EasyDarwin官网卖的海芯威视的IP Camera。如果想接入其他家的IP Camera（如海康、大华等）可自己将SDK库及调用方式换成相应的版本。

代码解析

下面是IP Camera SDK 数据回调函数的部分，解析回调出来的数据并使用libEasyRTMP库进行RTMP推送。关于回调出来的音频数据如果不是AAC格式，可以通过EasyDarwin团队提供的开源的EasyAACEncoder将其转成AAC格式再推送，当然使用其他的方式只要能转成正确的AAC格式就可以。

HI_S32 NETSDK_APICALL OnStreamCallback(HI_U32 u32Handle,
HI_U32 u32DataType,
HI_U8* pu8Buffer,
HI_U32 u32Length,
HI_VOID* pUserData
)
{
HI_S_AVFrame* pstruAV = HI_NULL;
HI_S_SysHeader* pstruSys = HI_NULL;

if (u32DataType == HI_NET_DEV_AV_DATA)
{
pstruAV = (HI_S_AVFrame*)pu8Buffer;

if (pstruAV->u32AVFrameFlag == HI_NET_DEV_VIDEO_FRAME_FLAG)
{
if(g_RtmpHandle == 0 ) return 0;

if(pstruAV->u32AVFrameLen > 0)
{
unsigned char* pbuf = (unsigned char*)(pu8Buffer+sizeof(HI_S_AVFrame));

EASY_AV_Frame  avFrame;
memset(&avFrame, 0x00, sizeof(EASY_AV_Frame));
avFrame.u32AVFrameLen = pstruAV->u32AVFrameLen;
avFrame.pBuffer = (unsigned char*)pbuf;
avFrame.u32VFrameType = (pstruAV->u32VFrameType==HI_NET_DEV_VIDEO_FRAME_I)?EASY_SDK_VIDEO_FRAME_I:EASY_SDK_VIDEO_FRAME_P;
avFrame.u32AVFrameFlag = EASY_SDK_VIDEO_FRAME_FLAG;
avFrame.u32TimestampSec = pstruAV->u32AVFramePTS/1000;
avFrame.u32TimestampUsec = (pstruAV->u32AVFramePTS%1000)*1000;
EasyRTMP_SendPacket(g_RtmpHandle, &avFrame);
}
}
else
if (pstruAV->u32AVFrameFlag == HI_NET_DEV_AUDIO_FRAME_FLAG)
{
if(g_RtmpHandle == 0 ) return 0;

EASY_AV_Frame   avFrame;
memset(&avFrame, 0x00, sizeof(EASY_AV_Frame));
avFrame.u32AVFrameFlag = EASY_SDK_AUDIO_FRAME_FLAG;

if(pstruAV->u32AVFrameLen <= 4) return 0;

if(EasyInitAACEncoder(EASY_SDK_AUDIO_CODEC_G711A) == 0)
{
memset(m_pAACEncBufer, 0, 64*1024);
unsigned int iAACBufferLen = 0;
unsigned char* pbuf = (unsigned char*)(pu8Buffer+sizeof(HI_S_AVFrame)) + 4;
if(Easy_AACEncoder_Encode(g_pAACEncoderHandle, (unsigned char*)pbuf,  pstruAV->u32AVFrameLen-4, m_pAACEncBufer, &iAACBufferLen) > 0)
{
avFrame.pBuffer = (Easy_U8*)(m_pAACEncBufer);
avFrame.u32AVFrameLen  = iAACBufferLen;
avFrame.u32TimestampSec = pstruAV->u32AVFramePTS/1000;
avFrame.u32TimestampUsec = (pstruAV->u32AVFramePTS%1000)*1000;
EasyRTMP_SendPacket(g_RtmpHandle, &avFrame);
}
}
}
}
else
if (u32DataType == HI_NET_DEV_SYS_DATA)
{
pstruSys = (HI_S_SysHeader*)pu8Buffer;
printf("Video W:%u H:%u Audio: %u \n", pstruSys->struVHeader.u32Width, pstruSys->struVHeader.u32Height, pstruSys->struAHeader.u32Format);
}
return HI_SUCCESS;
}

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