EasyDarwin流媒体云平台:EasyCamera开源摄像机接入海康威视摄像机实时视频
本文转自EasyDarwin团队成员Alex的博客:http://blog.csdn.net/cai6811376/article/details/52755298
EasyCamera接收云平台实时视频请求命令,会向EasyDarwin流媒体服务器进行推流操作。那么EasyCamera是如何通过海康摄像机SDK获取到媒体流的呢?
我们继续看海康摄像机SDK
这里使用NET_DVR_RealPlay_V40/NET_DVR_StopRealPlay接口控制实时视频。
在获取实时视频调用之前,我们需要知道摄像机目前的参数配置,比如FPS,码率等等。
//参数获取
NET_DVR_COMPRESSIONCFG_V30 struCompressionCfg;
memset(&struCompressionCfg, 0, sizeof(struCompressionCfg));
DWORD dwReturned = 0;
EASY_MEDIA_INFO_T mediainfo;
memset(&mediainfo, 0x00, sizeof(EASY_MEDIA_INFO_T));
mediainfo.u32VideoCodec = EASY_SDK_VIDEO_CODEC_H264;
mediainfo.u32AudioChannel = 1;
if (!NET_DVR_GetDVRConfig(m_u32Handle, NET_DVR_GET_COMPRESSCFG_V30, 1, &struCompressionCfg, sizeof(NET_DVR_COMPRESSIONCFG_V30), &dwReturned))
{
printf("can't get config!\n");
mediainfo.u32VideoFps = 25;
mediainfo.u32AudioCodec = EASY_SDK_AUDIO_CODEC_G711A;
mediainfo.u32AudioSamplerate = 8000;
}
else
{
mediainfo.u32VideoFps = getFrameRateFromHKSDK(struCompressionCfg.struNormHighRecordPara.dwVideoFrameRate);
mediainfo.u32AudioCodec = getAudioCodecFromHKSDK(struCompressionCfg.struNormHighRecordPara.byAudioEncType);
mediainfo.u32AudioSamplerate = getAudioSimpleRateFromHKSDK(struCompressionCfg.struNormHighRecordPara.byAudioSamplingRate);
}
//实时视频调用
NET_DVR_PREVIEWINFO struPlayInfo = { 0 };
struPlayInfo.hPlayWnd = NULL; //需要 SDK 解码时句柄设为有效值,仅取流不解码时可设为空
struPlayInfo.lChannel = 1; //预览通道号
struPlayInfo.dwStreamType = 0; //0-主码流, 1-子码流, 2-码流 3, 3-码流 4,以此类推
struPlayInfo.dwLinkMode = 0; //0- TCP 方式, 1- UDP 方式, 2- 多播方式, 3- RTP 方式, 4-RTP/RTSP, 5-RSTP/HTTP
struPlayInfo.bBlocked = 1; //0- 非阻塞取流, 1- 阻塞取流
streamHandle = NET_DVR_RealPlay_V40(m_u32Handle, &struPlayInfo, myStreamProc, this);
if (streamHandle < 0)
{
qtss_printf("NET_DVR_RealPlay_V40 Fail\n");
LONG error = NET_DVR_GetLastError();
return QTSS_RequestFailed;
}
//数据回调
QTSS_Error EasyCameraSource::PushFrame(unsigned char* frame, int len, DWORD dataType)
{
OSMutexLocker locker(&fStreamingMutex);
if (fPusherHandle == NULL) return QTSS_Unimplemented;
if (dataType == NET_DVR_STREAMDATA)
{
if (len > 0)
{
unsigned char *h264Buf = NULL;
int h264Len = 0;
BOOL isVideo;
GetH246FromPS(frame, len, &h264Buf, h264Len, isVideo);
if (isVideo)
{
if (h264Buf)
{
/*printf("size:%04d\t[0]:0x%08X\t[1]:0x%08X\t[2]:0x%08X\t[3]:0x%08X\t[4]:0x%08X \n",
h264Len, h264Buf[0], h264Buf[1], h264Buf[2], h264Buf[3], h264Buf[4]);*/
if (h264Buf[0] == 0 && h264Buf[1] == 0 && h264Buf[2] == 0 && h264Buf[3] == 1)
{
if (fPusherBuffOffset > 0)
{
EASY_AV_Frame avFrameVideo;
memset(&avFrameVideo, 0x00, sizeof(EASY_AV_Frame));
avFrameVideo.u32AVFrameLen = fPusherBuffOffset;
avFrameVideo.pBuffer = (unsigned char*)fPusherBuff;
bool isKeyFrame = IsIFrame(fPusherBuff);
avFrameVideo.u32VFrameType = isKeyFrame ? EASY_SDK_VIDEO_FRAME_I : EASY_SDK_VIDEO_FRAME_P;
avFrameVideo.u32AVFrameFlag = EASY_SDK_VIDEO_FRAME_FLAG;
//avFrameVideo.u32TimestampSec = pstruAV->u32AVFramePTS / 1000;
//avFrameVideo.u32TimestampUsec = (pstruAV->u32AVFramePTS % 1000) * 1000;
Easy_U32 ret = EasyPusher_PushFrame(fPusherHandle, &avFrameVideo);
//printf("-- Pushing: Frame %s Result %d \n", isKeyFrame ? "I" : "P", ret);
fPusherBuffOffset = 0;
}
memcpy(fPusherBuff, h264Buf, h264Len);
fPusherBuffOffset += h264Len;
}
else
{
if (fPusherBuffOffset > 0)
{
memcpy(fPusherBuff + fPusherBuffOffset, h264Buf, h264Len);
fPusherBuffOffset += h264Len;
}
}
}
if (h264Buf)
{
delete[] h264Buf;
h264Buf = NULL;
}
}
}
}
else if (dataType == NET_DVR_AUDIOSTREAMDATA)
{
if (len > 0)
{
EASY_AV_Frame avFrameAudio;
memset(&avFrameAudio, 0x00, sizeof(EASY_AV_Frame));
avFrameAudio.u32AVFrameLen = len;
avFrameAudio.pBuffer = (unsigned char*)frame;
avFrameAudio.u32AVFrameFlag = EASY_SDK_AUDIO_FRAME_FLAG;
//avFrameAudio.u32TimestampSec = pstruAV->u32AVFramePTS / 1000;
//avFrameAudio.u32TimestampUsec = (pstruAV->u32AVFramePTS % 1000) * 1000;
EasyPusher_PushFrame(fPusherHandle, &avFrameAudio);
}
}
return Easy_NoErr;
}
源码及视频教程
源码地址:https://github.com/EasyDarwin/EasyDarwin/tree/master/EasyCamera-HK
视频教程地址:[http://edu.csdn.net/course/detail/3029
](http://edu.csdn.net/course/detail/3029)
获取更多信息
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