void BitRateEstimation(IltmmConvert *pConvert) { long PossibleBitRate, ActualBitRate; // get the estimate bit rate before conversion starts (theoretical) pConvert->EstimateOutputBitRate(&PossibleBitRate); // start the conversion pConvert->StartConvert(); // After starting conversion, get the estimate output bit rate (estimate from actually written bytes) pConvert->EstimateOutputBitRate(&ActualBitRate); // do something with the returned values. }