Re: NUL not working.

Hello Forum,

 

Thanks for your reply. But how to do this in c++. I am using vc6.0.

 

Thanks and Regards

Try to use the null renderer filter as follows:
+------------+
static const CLSID CLSID_NullRenderer = { 0xC1F400A4, 0x3F08, 0x11d3, { 0x9F,
0x0B, 0x00, 0x60, 0x08, 0x03, 0x9E, 0x37 } };

#pragma comment(lib, "C:\\Program Files\\Microsoft
SDKs\\Windows\\v6.0A\\Lib\\Strmiids.lib")

BOOL SetTargetFile()
{
...
CComPtr<IBaseFilter> pNullFilter;

HRESULT hr = S_OK;

hr = CoCreateInstance(CLSID_NullRenderer, NULL, CLSCTX_INPROC_SERVER,
IID_IBaseFilter, (LPVOID*) &pNullFilter);

hr = m_convert->put_TargetObject(pNullFilter);

m_convert->EditGraph();
...
}
+------------+

Thanks,
Maen Badwan
LEADTOOLS Technical Support

Hello Forum,

Thanks for your reply.

But still I am getting following error on windows server 2008,

"LTMM Error: The system cannot find the file specified."

On my development machine vc6.0 and "Microsoft platform sdk for Windows Server 2003 R2" is installed,

so I changed this line from

#pragma comment(lib, "C:\\Program Files\\Microsoft SDKs\\Windows\\v6.0A\\Lib\\Strmiids.lib");

to #pragma comment(lib,"C:\\Program Files\\Microsoft Platform SDK for Windows Server 2003 R2\\Lib\\Strmiids.lib");

then I got some linking error,  then I changes this line to

#pragma comment(lib,"C:\Program Files\\Microsoft Visual Studio\\VC98\\Lib\\Strmiids.lib");

does this lib cause the error or any other solution to resolve this issue.

Thanks and Regards

Yogesh

Yogesh,
Which part of your application failed? The linker options you changed may or may not be directly related to the runtime error you're getting.

Please try to isolate the issue you're facing in a small working project (NOT your full application) and send it to me in a ZIP or RAR file.

Hello Forum,

Here I am attaching sample.zip  program which works on windows xp but not on windows server 2008 and wincows 7.

 

 

Thanks and Regards

Yogesh

 

I want to investigate it further. Please send an email to support@leadtools.com and include the following:
1) A link to this forum post.
2) Your LEADTOOLS serial number (do not post it here).
3) The build number (version info) of the Ltmm??.dll and DSKernel2.dll

I re-checked your project and I noticed that you are setting both 'NUL' as the m_convert->put_TargetFile and the NullRenderer. You should use one not both, and since using 'NUL' for the put_TargetFile property does not work on all operating machines, use the NullRenderer only.

if my capture application switches between devices and capture sizes, do i need to re-set the renderer to NULL?

thanks!

Do I need use the EditGraph() call? my system hangs when I make that function call

Please don't assume that you are facing the same issue on this forum thread. If you are facing a problem using the NullRenderer, please send us the details in a new forum post or send it to in an email to support@leadtools.com.