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);
2. 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);
3. 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();
4. 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);
5. 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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