How to add scriptcommand/markers to live mms stream for sync

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• lunedì 17 dicembre 2012 17:16

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  WMS does not crack open the stream much beyond the header, so there is no way to do this server-side.  Instead you can use the Windows Media Format SDK, http://msdn.microsoft.com/en-us/library/windows/desktop/dd757738(v=vs.85).aspx, to act as a mini-service that receives the stream from the encoder, modifies it, and then pushes it to WMS.

  • Contrassegnato come risposta David Bristol [msft]Microsoft Employee, Moderator lunedì 17 dicembre 2012 17:16
  • Contrassegno come risposta annullato windowsmedia1 lunedì 17 dicembre 2012 17:53
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• lunedì 17 dicembre 2012 17:23

   

   
  

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  Thanks David !

  I have checked Windows Media Format SDK before and I couldn't find any pointers for live stream . Can you provide me some info on what methods I can use to achieve or any sample you could guide me to ?

  I have been working on some solution for more than a week so I would really appreciate your help .

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• lunedì 17 dicembre 2012 17:50

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  If you install the Windows SDK one of the samples should be located in the C:\Program Files\Microsoft SDKs\Windows\v7.0\Samples\multimedia\windowsmediaformat\wmvnetwrite folder.  The WMVNetWrite sample will give the network interaction piece.  Beyond that I'd recommend reading through this: http://msdn.microsoft.com/en-us/library/windows/desktop/dd757589(v=vs.85).aspx

  • Contrassegnato come risposta David Bristol [msft]Microsoft Employee, Moderator martedì 18 dicembre 2012 14:39
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• mercoledì 19 dicembre 2012 18:42

   

   
  

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  Thanks that helped . Now I am listening to a publisher point get stream and publishing it to another publishing point . But while adding scriptcommand I get following error .

  " 0x8000FFFF" 

  HRESULT CNetWrite::OnStreamSample( WORD wStreamNum, 
                                    QWORD cnsSampleTime, 
                                    QWORD cnsSampleDuration, 
                                    DWORD dwFlags, 
                                    INSSBuffer __RPC_FAR *pSample, 
                                    void __RPC_FAR *pvContext )
  {
      _tprintf( _T( "StreamSample: num=%d, time=%d, duration=%d, flags=%d.\n" ),
          wStreamNum, ( DWORD )cnsSampleTime, cnsSampleDuration, dwFlags );
  
      if( m_pWriterAdvanced != NULL )
      {
          // Give the sample to the writer object.
  
  		
          HRESULT hr = m_pWriterAdvanced->WriteStreamSample( wStreamNum,
                                                             cnsSampleTime,
                                                             0,
                                                             cnsSampleDuration,
                                                             dwFlags,
                                                             pSample );
  
  		m_qwLastSampleTime = cnsSampleTime;
  		multimap<QWORD, ScriptCmd>::iterator i;
  		
  
  		ScriptCmd Cmd;
  
  		Cmd.DataLen = 5;//(swprintf((WCHAR*)Cmd.Data, L"URL") + 1) * sizeof(WCHAR);
  		//Cmd.DataLen += (swprintf((WCHAR*)(Cmd.Data + Cmd.DataLen), L"%S", data.c_str()) + 1) * sizeof(WCHAR);
  
  		EnterCriticalSection(&m_CritSection);
  		QWORD qwScriptTime = m_qwLastSampleTime + ((QWORD)5 * 10000I64);
  		if(cnsSampleTime>55180000){
  			m_Scripts.insert( make_pair(qwScriptTime, Cmd) );
  		}
  		LeaveCriticalSection(&m_CritSection);
  		_tprintf("Script Size :%d,Stream Num:%d", m_Scripts.size(),wStreamNum);
  		
  		if (m_Scripts.size())
  		{
  			i = m_Scripts.begin();
  			while ((cnsSampleTime + 5000000I64) >= i->first)
  			{
  				// Pass sample to encoding engine in use.
  					INSSBuffer *pBuffer = NULL;
  					BYTE *lpOutputBuffer = NULL;
  
  					HRESULT hr = m_pWriter->AllocateSample(i->second.DataLen, &pBuffer);
  					if (FAILED(hr)){
  						_tprintf("ERROR: CNetWrite::OnStreamSample - Error 0x%X allocating sample from writer object.\n", hr);
  						throw hr;
  					}
  
  					hr = pBuffer->GetBuffer(&lpOutputBuffer);
  					if (FAILED(hr)){
  						_tprintf("ERROR: CNetWrite::OnStreamSample - Error 0x%X getting write buffer from buffer object.\n", hr);
  						throw hr;
  					}
  
  					CopyMemory(lpOutputBuffer, i->second.Data, i->second.DataLen);
  
  					hr = pBuffer->SetLength(i->second.DataLen);
  					if (FAILED(hr)){
  						_tprintf("ERROR: CNetWrite::OnStreamSample - Error 0x%X setting buffer length.\n", hr);
  						throw hr;
  					}
  
  
  					hr = m_pWriterAdvanced->WriteStreamSample( wStreamNum, i->first, 0, 0, dwFlags, pBuffer);
  					if (FAILED(hr)){
  						_tprintf("ERROR: CNetWrite::OnStreamSample - Error 0x%X writing script to stream.\n", hr);
  						throw hr;
  					}
  
  					WCHAR *pwszURL = wcschr((WCHAR*)i->second.Data, L'\0');
  					pwszURL++;
  					_tprintf("INFO: Successfully encoded script: %S at %I64d\n", pwszURL, i->first);
  
  					
  					m_Scripts.erase(i);
  					i = m_Scripts.begin();
  					if (m_Scripts.size() <= 0)
  						break;
  
  			}
  		}
  
  		if( FAILED( hr ) )
          {
              _tprintf( _T(  "Error 0x%x reported by the writer\n" ), hr );
  
              m_bEOF = true;
              m_hrAsync = hr;
              SetEvent( m_hEvent );
          }
      }
  
      return S_OK;
  }

  
  

  
  

  • Modificato windowsmedia1 mercoledì 19 dicembre 2012 18:42
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• venerdì 4 gennaio 2013 22:59

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  Where do you get the error?
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