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);}   }elseif (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);}}       }}elseif (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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