From Forum Nokia Wiki

CMPMediaRecognizer is basically used to identify the type of the media file, for example can local audio or video file,local audio play list, local Ram file etc. Its also used to check the valid Url and also MIME type of the file.

Below is the example code which demostrate CMPMediaRecognizer usuage.

_LIT(KVideo,"c:\\fileName.rm");
void CTestMPMediaRecognizerAppUi::ConstructL()
{
....    
   CMPMediaRecognizer* iMPRecognizer = CMPMediaRecognizer::NewL();
....
}
 
void CTestMPMediaRecognizerAppUi::IdentifyMediaTypeL()
{
   TBuf<20> aText;
   CMPMediaRecognizer::TMPMediaType aType;
   //Recognizes media type, returns TMPMediaType which contains different media files
   aType = iRecognizer->IdentifyMediaTypeL(KVideo,EFalse);
   if (aType == 0)
   {
   	_LIT(aText,"VideoFile");
   	CEikonEnv::InfoWinL(_L("Media Type"),aText);
        aText.Zero();
   }
   else
   {
   	_LIT(aText,"Other Format");
   	CEikonEnv::InfoWinL(_L("Media Type"),aText);
        aText.Zero();
   }
   //Recognizes Media files MimeType.
   aText = iRecognizer->MimeTypeL(KVideo);
   CEikonEnv::InfoWinL(_L("MIME Type"),aText);
}
 
void CTestMPMediaRecognizerAppUi::CheckUrl()
{
   //Checks if Url is valid or not.
   TBool validUrl = iRecognizer->ValidUrl(KUrl);
   if (validUrl)
       CEikonEnv::InfoWinL(_L("Valid Url"),_L(""));
   else
       CEikonEnv::InfoWinL(_L("Not Valid"),_L(""));
}