Adding Script Commands to Windows Media Video

This example shows how to access the ltmmWMScript object, using it to create script commands when converting to WMV video.

  1. Set the convert source, target and target format as follows:

C Source 

IltmmConvert_put_SourceFile(pConvert, L"source.avi"); 
IltmmConvert_put_TargetFile(pConvert, L"target.wmv"); 
IltmmConvert_put_TargetFormat(pConvert, ltmmConvert_TargetFormat_WMV_Mux);

C++ Source 

pConvert->put_SourceFile(L"source.avi"); 
pConvert->put_TargetFile(L"target.wmv"); 
pConvert->put_TargetFormat(ltmmConvert_TargetFormat_WMV_Mux);

  1. Call the convert object to retrieve the target filter as follows:

C Source 

IUnknown *pUnk; 
IltmmConvert_GetSubObject(pConvert, ltmmConvert_Object_TargetFilter, &pUnk);

C++ Source 

IUnknown *pUnk; 
pConvert->GetSubObject(ltmmConvert_Object_TargetFilter, &pUnk);

  1. Retrieve the ltmmWMScript interface as follows:

C Source 

IltmmWMScript *pWMScript; 
IUnknown_QueryInterface(pUnk, &IID_IltmmWMScript, (void**)&pWMScript); 
IUnknown_Release(pUnk);

C++ Source 

IltmmWMScript *pWMScript; 
pUnk->QueryInterface(&IID_IltmmWMScript, (void**)&pWMScript); 
pUnk->Release();

  1. Add a header script at 5.0 seconds as follows:

C Source 

IltmmWMScript_AddHeaderScript(pWMScript, L"caption", L"Test Caption", 5.0);

C++ Source 

pWMScript->AddHeaderScript(L"caption", L"Test Caption", 5.0);

  1. Clean up the ltmmWMScript object as follows:

C Source 

IUnknown_Release(pWMScript);

C++ Source 

pWMScript->Release();

6.Start the conversion as follows:

C Source 

IltmmConvert_StartConvert(pConvert)

C++ Source 

pConvert->StartConvert();

For the complete C example, refer to IltmmWMScript HeaderScripts Example for C.

For the complete C++ example, refer to IltmmWMScript HeaderScripts Example for C++.

To see how to handle script commands during playback, see Processing Script Commands During Windows Media Video Playback.

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LEADTOOLS Multimedia C API Help
Introduction
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Getting Started
Copyright Notice
Directories
Multimedia Files You Must Include With Your Application (Redistributables)
Frequently Asked Questions
LEADTOOLS Multimedia Features
Add-on Modules
Programming with LEADTOOLS Multimedia
Appendix
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