void SetConvertAllowedStreams(IltmmConvert *pConvert)
{
long lAllowedStreams = ltmmConvert_Stream_Video;
// set the allowed conversion streams to Video
pConvert->put_AllowedStreams(lAllowedStreams);
// start the convert
pConvert->StartConvert();
// get the allowed conversion streams
pConvert->get_AllowedStreams(&lAllowedStreams);
}