EasyRTMP推流助力EasyNVR安防摄像机互联网化,实现核心的RTSP流转RTMP/HLS(m3u8)/HTTP-FLV流功能

2020-04-23 11:37:20 浏览数 (1)

我们在常用的安防监控、互联网视频直播等系统服务中,常常最主要的就那么几个环节:

  • 视频获取:RTSP源、SDK源、GB28181源;
  • 视频输出:RTMP推流、SDK推流、GB28181 PS over RTP输出;
  • 视频转换:Demux、Mux、Codec、Snap、Info等等;

今天,我们着重讲解的是视频输出中的RTMP推流功能,这也是我们EasyNVR功能组件中,最为重要的一个组成部分! EasyRTMP是一套封装了基础的RTMP推流协议,并提供了一套非常简单易用调用接口的功能组件,在Github上有多个基于EasyRTMP SDK的Demo。Github地址:https://github.com/EasyDSS/EasyRTMP, Demo中EasyRTMP_RTSP项目是将RTSP流获取到本地进行RTMP推送,可进行RTMP直播。

RTSP视频源进行RTMP直播:EasyRTMP_RTSP

目前市面上的安防设备,现有的以及未来的,基本都是RTSP协议输出格式,且为被动拉流才能从设备获取到音视频流,更不用说直接推流到RTMP流媒体服务器或者CDN了。

在:https://github.com/EasyDSS/EasyRTMP EasyRTMP_RTSP Demo中通过libEasyRTSPClient库将RTSP数据流获取回调,再将获取来的音视频数据送给libEasyRTMP进行RTMP推送。如果获取来的数据不是AAC格式,而是G711、G726、PCM等格式,使用EasyDarwin团队提供的开源的EasyAACEncoder将音频数据转换成AAC格式再推送。这样可以实现将RTSP视频源实时的进行RTMP协议直播。

代码语言:javascript复制
/* EasyRTSPClient获取数据后回调给上层 */
int Easy_APICALL __RTSPSourceCallBack( int _chid, void *_chPtr, int _mediatype, char *pbuf, RTSP_FRAME_INFO *frameinfo)
{
	if (NULL != frameinfo)
	{
		if (frameinfo->height==1088)		frameinfo->height=1080;
		else if (frameinfo->height==544)	frameinfo->height=540;
	}
	Easy_Bool bRet = 0;
	int iRet = 0;

	//目前只处理视频
	if (_mediatype == EASY_SDK_VIDEO_FRAME_FLAG)
	{
		if(frameinfo && frameinfo->length)
		{
			if( frameinfo->type == EASY_SDK_VIDEO_FRAME_I)
			{
				if(g_rtmpPusher.rtmpHandle == 0)
				{
					g_rtmpPusher.rtmpHandle = EasyRTMP_Create();

					bRet = EasyRTMP_Connect(g_rtmpPusher.rtmpHandle, SRTMP);
					if (!bRet)
					{
						printf("Fail to EasyRTMP_Connect ...n");
					}

					EASY_MEDIA_INFO_T mediaInfo;
					memset(&mediaInfo, 0, sizeof(EASY_MEDIA_INFO_T));
					mediaInfo.u32VideoFps = 25;
					mediaInfo.u32AudioSamplerate = 8000;
					iRet = EasyRTMP_InitMetadata(g_rtmpPusher.rtmpHandle, &mediaInfo, 1024);
					if (iRet < 0)
					{
						printf("Fail to InitMetadata ...n");
					}
				}

				EASY_AV_Frame avFrame;
				memset(&avFrame, 0, sizeof(EASY_AV_Frame));
				avFrame.u32AVFrameFlag = EASY_SDK_VIDEO_FRAME_FLAG;
				avFrame.u32AVFrameLen = frameinfo->length;
				avFrame.pBuffer = (unsigned char*)pbuf;
				avFrame.u32VFrameType = EASY_SDK_VIDEO_FRAME_I;
				avFrame.u32TimestampSec = frameinfo->timestamp_sec;
				avFrame.u32TimestampUsec = frameinfo->timestamp_usec;
				
				iRet = EasyRTMP_SendPacket(g_rtmpPusher.rtmpHandle, &avFrame);
				if (iRet < 0)
				{
					printf("Fail to EasyRTMP_SendH264Packet(I-frame) ...n");
				}
				else
				{
					printf("I");
				}
			}
			else
			{
				if(g_rtmpPusher.rtmpHandle)
				{
					EASY_AV_Frame avFrame;
					memset(&avFrame, 0, sizeof(EASY_AV_Frame));
					avFrame.u32AVFrameFlag = EASY_SDK_VIDEO_FRAME_FLAG;
					avFrame.u32AVFrameLen = frameinfo->length-4;
					avFrame.pBuffer = (unsigned char*)pbuf 4;
					avFrame.u32VFrameType = EASY_SDK_VIDEO_FRAME_P;
					avFrame.u32TimestampSec = frameinfo->timestamp_sec;
					avFrame.u32TimestampUsec = frameinfo->timestamp_usec;
					iRet = EasyRTMP_SendPacket(g_rtmpPusher.rtmpHandle, &avFrame);
					if (iRet < 0)
					{
						printf("Fail to EasyRTMP_SendH264Packet(P-frame) ...n");
					}
					else
					{
						printf("P");
					}
				}
			}				
		}	
	}
	else if (_mediatype == EASY_SDK_AUDIO_FRAME_FLAG)
	{
		EASY_AV_Frame	avFrame;
		memset(&avFrame, 0x00, sizeof(EASY_AV_Frame));
		avFrame.u32AVFrameFlag = EASY_SDK_AUDIO_FRAME_FLAG;
		avFrame.u32TimestampSec = frameinfo->timestamp_sec;
		avFrame.u32TimestampUsec = frameinfo->timestamp_usec;

		if(frameinfo->codec == EASY_SDK_AUDIO_CODEC_AAC)
		{
			avFrame.pBuffer = (Easy_U8*)(pbuf);
			avFrame.u32AVFrameLen  = frameinfo->length;	
			printf("*");
			iRet = EasyRTMP_SendPacket(g_rtmpPusher.rtmpHandle, &avFrame);
		}
		else if ((frameinfo->codec == EASY_SDK_AUDIO_CODEC_G711A) || (frameinfo->codec == EASY_SDK_AUDIO_CODEC_G711U) || (frameinfo->codec == EASY_SDK_AUDIO_CODEC_G726))
		{
			if(EasyInitAACEncoder(frameinfo) == 0)
			{
				memset(g_rtmpPusher.m_pAACEncBufer, 0, 64*1024);
				unsigned int iAACBufferLen = 0;

				if(Easy_AACEncoder_Encode(g_rtmpPusher.m_pAACEncoderHandle, (unsigned char*)pbuf,  frameinfo->length, g_rtmpPusher.m_pAACEncBufer, &iAACBufferLen) > 0)
				{
					printf("*");
					avFrame.pBuffer = (Easy_U8*)(g_rtmpPusher.m_pAACEncBufer);
					avFrame.u32AVFrameLen  = iAACBufferLen;	
					iRet = EasyRTMP_SendPacket(g_rtmpPusher.rtmpHandle, &avFrame);
				}
			}
		}
	}

	return 0;
}

接收RTMP推流并进行RTMP/FLV/HLS/RTSP同步输出:EasyDSS

通常情况下,EasyRTMP推流到标准的RTMP流媒体服务器就能实现基础的RTMP、HLS(m3u8)直播功能,但,如果需要得到一个更好的直播输出效果,我们通常选择的是EasyDSS流媒体服务器,EasyDSS流媒体服务器解决方案是一套集流媒体点播、转码与管理、直播、录像、检索、时移回看于一体的一套完整的商用流媒体服务器解决方案,EasyDSS高性能RTMP流媒体服务器支持RTMP推流,同步输出HTTP、RTMP、HLS、HTTP-FLV、RTSP,支持推流分发/拉流分发,支持秒开、GOP缓冲、录像、检索、回放、录像下载、网页管理等多种功能,是目前市面上最合理的一款流媒体服务器!

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