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Re: A follow message for the MP2 Transport UDP issue Started by zwen at 11-20-2007 9:30. Topic has 4 replies. LEAD Support Fo... » Developer » Multimedia Filt... » Re: A follow message for the MP2 Transport UDP issue

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11-20-2007, 9:30 zwen Joined on 11-20-2007 Posts 7 How to load udp source (iP:127.0.0.1, port: 1234) in the UDP source filter in Directshow Hi, I have successfully add the MPEG2 UDP source filter in the directshow graph by CoCreateInstance. However, I couldn't find any function to load a stream from a UDP source. (only few functions exposed such as setsynsource, findpin, enumpin...etc, but no source loading function). I am developing in Visual Studio 2005, unmanaged C++ with Directshow. My intention is to add udp source, transport demultiplexer, h264 decoder, vmr renderer in the graph then call the directshow RenderFile(). Thanks in advanced. Jeff    Report

11-20-2007, 12:08 zwen Joined on 11-20-2007 Posts 7 A follow message for the MP2 Transport UDP issue I think the question, more precisely, is how a MP2 Transport UDP can be invoked in DirectShow. I have tried the following: DEFINE_GUID(CLSID_LEADMPEG2TransportUDPSource, 0xE2B7DF17,0x38C5,0x11D5,0x91,0xF6,0x00,0x10,0x4B,0xDB,0x8F,0xF9); CComPtr pUDPSource; hr = pUDPSource.CoCreateInstance(CLSID_LEADMPEG2TransportUDPSource); hr = pGB->AddFilter(pUDPSource, L"UDP filter"); Anything wrong or missing? Just the Load function is not shown in the above interface.? regards Jeff    Report

11-21-2007, 7:01 Maen Hasan Joined on 08-05-2004 Posts 1,715 Re: A follow message for the MP2 Transport UDP issue Hello, The LEAD MPEG2 Transport UDP Source filter exposes the standard IFileSourceFilter interface. Use the IFileSourceFilter::Load method to let the LEAD MPEG2 Transport Source filter know where to read the data from. For more information, see the topic "IFileSourceFilter Interface" in our LEADTOOLS Multimedia Filters help file. Thanks, Maen Badwan LEADTOOLS Technical Support    Report

11-21-2007, 14:24 zwen Joined on 11-20-2007 Posts 7 Re: A follow message for the MP2 Transport UDP issue Hi, Thanks for your reply. I know the Lead UDP source filter should be exposed to the DirectShow IFileSourceFilter(). But when I invoke the UDP filter via the CoCreateInstance method, the Load function is missing from the interface. I don't know if the invoke process ( use CoCreateInstance, and the UDP source filter CLSID) is correct or not? The Lead H264 decoder and the demultiplxer filters work perfectly in our project and just this UDP source filter seems not working. ( I am trying to quickly develop a working demo for the company to convince them the working of lead filters) Many thanks in advanced. Jeff Imagination Technologies, UK    Report

11-22-2007, 8:20 Adnan Ismail Joined on 07-31-2006 Posts 1,150 Re: A follow message for the MP2 Transport UDP issue Jeff, Did you try to query the COM object to obtain the IFileSourceFilter inteface? CoCreateInstance alone will not return the correct interface pointer. You should also use QueryInterface after you create the object. Adnan Ismail LEADTOOLS Technical Support    Report

LEAD Support Fo... » Developer » Multimedia Filt... » Re: A follow message for the MP2 Transport UDP issue

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