Split a Large AVI Into Smaller Files

The following steps will split a large AVI into 2 smaller files.

  1. Create an instance of the ltmmConvert class. This is accomplished using the Win32 CoCreateInstance function as follows:

C Source 

IltmmConvert* pConvert;   
CoCreateInstance(&CLSID_ltmmConvert, NULL, CLSCTX_INPROC_SERVER, &IID_IltmmConvert, (void**) &pConvert);

C++ Source 

IltmmConvert* pConvert;   
CoCreateInstance(CLSID_ltmmConvert, NULL, CLSCTX_INPROC_SERVER, IID_IltmmConvert, (void**) &pConvert);

Note: Pick a compressor when splitting a non-AVI or a non-WAV file to avoid creating two huge uncompressed files.

  1. Set the source file as follows:

C Source 

BSTR bstr;   
bstr = SysAllocString(L"c:\\Source.avi");   
IltmmConvert_put_SourceFile(pConvert, bstr);   
SysFreeString(bstr);

C++ Source 

BSTR bstr;   
bstr = SysAllocString(L"c:\\Source.avi");   
pConvert->put_SourceFile(bstr);    
SysFreeString(bstr);

  1. Get the duration of the media as follows:

C Source 

double fDur;   
IltmmConvert_get_Duration(pConvert, &fDur);

C++ Source 

double fDur;   
pConvert->get_Duration(&fDur);

  1. Save the first small avi file as follows:

C Source 

bstr = SysAllocString(L"c:\\Avi1.avi");    
IltmmConvert_put_TargetFile(pConvert, bstr);   
SysFreeString(bstr);   
IltmmConvert_put_SelectionEnd(pConvert, fDur/2);   
IltmmConvert_StartConvert(pConvert);

C++ Source 

BSTR bstr;   
bstr = SysAllocString(L"c:\\Avi1.avi");    
pConvert->put_TargetFile(bstr);   
SysFreeString(bstr);   
pConvert->put_SelectionEnd(fDur/2);   
pConvert->StartConvert();

5.Save the second small avi file as follows:

C Source 

bstr = SysAllocString(L"c:\\Avi2.avi");    
IltmmConvert_put_TargetFile(pConvert, bstr);   
SysFreeString(bstr);   
IltmmConvert_put_SelectionStart(fDur/2);   
IltmmConvert_put_SelectionEnd(pConvert, fDur);   
IltmmConvert_StartConvert(pConvert);

C++ Source 

bstr = SysAllocString(L"c:\\Avi2.avi");    
pConvert->put_TargetFile(bstr);   
SysFreeString(bstr);   
pConvert->put_SelectionStart(fDur/2);   
pConvert->put_SelectionEnd(fDur);   
pConvert->StartConvert();

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LEADTOOLS Multimedia C API Help
Introduction
Version History
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
LEADTOOLS Licensing