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.

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

C API

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

C++

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

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

C API

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

C++

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

Retrieve the ltmmWMScript interface as follows:

C API

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

C++

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

Add a header script at 5.0 seconds as follows:

C API

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

C++

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

Clean up the ltmmWMScript object as follows:

C API

IUnknown_Release(pWMScript);

C++

pWMScript->Release();

Start the conversion as follows:

C API

IltmmConvert_StartConvert(pConvert)

C++

pConvert->StartConvert();

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

Example

Language	Example
C	IltmmWMScript HeaderScripts
C++	IltmmWMScript HeaderScripts

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Help Version 22.0.2023.1.26

LEADTOOLS Multimedia C API Help

Multimedia Files You Must Include With Your Application (Redistributables)

Frequently Asked Questions

LEADTOOLS Multimedia Features

Add-on Modules

Programming with LEADTOOLS Multimedia

Appendix

LEADTOOLS Licensing