This example will retrieve the source file properties and show them in message boxes.
#define MAKE_MEDIA_PATH(pFileName) (TEXT("C:\\LEADTOOLS 17.5\\Media\\")TEXT(pFileName)) #include <windows.h> #include <tchar.h> #include <stdio.h> #include "ltmm.h" #include "prsht.h" #if defined(_UNICODE) LPOLESTR T2OLE(LPCTSTR lpt) { return (LPOLESTR) lpt; } LPTSTR OLE2T(LPCOLESTR lpw) { return (LPTSTR) lpw; } #else LPOLESTR T2OLE(LPCTSTR lpt) { static OLECHAR lpw[512]; if(!lpt) return NULL; lpw[0] = L'\0'; MultiByteToWideChar(CP_ACP, 0, lpt, -1, lpw, 512); return lpw; } LPTSTR OLE2T(LPCOLESTR lpw) { static TCHAR lpt[512]; if(!lpw) return NULL; lpt[0] = _T('\0'); WideCharToMultiByte(CP_ACP, 0, lpw, -1, lpt, 512, NULL, NULL); return lpt; } #endif void AddStringToMsg(char *pszTitle, BSTR sString, char *pszMsg); void AddNumberToMsg(char *pszTitle, double dNumber, char *pszMsg, BOOL bFloat); int RetrievingMediaFileInformation_Example ( ) { IltmmMediaInfo *pMediaInfo; BSTR sString; char szMsg[8196]; long lStreams, lIndex, l; double d; HRESULT hr; CoInitialize(NULL); /* create an ltmmMediaInfo object: */ hr = CoCreateInstance(&CLSID_ltmmMediaInfo, NULL, CLSCTX_INPROC_SERVER, &IID_IltmmMediaInfo, (void**) &pMediaInfo); memset(szMsg, 0, 8196); /* set the source file: */ sString = SysAllocString((OLECHAR*)MAKE_MEDIA_PATH("Test.avi")); IltmmMediaInfo_put_SourceFile(pMediaInfo, sString); SysFreeString(sString); /* general properties: */ IltmmMediaInfo_get_SourceFile(pMediaInfo, &sString); AddStringToMsg("Source file: ", sString, szMsg); SysFreeString(sString); IltmmMediaInfo_get_SourceFileSize(pMediaInfo, &d); AddNumberToMsg("File size: ", d, szMsg, FALSE); IltmmMediaInfo_get_OutputStreams(pMediaInfo, &lStreams); AddNumberToMsg("Number of streams: ", (double)lStreams, szMsg, FALSE); IltmmMediaInfo_get_SourceDuration(pMediaInfo, &d); AddNumberToMsg("File duration: ", d, szMsg, TRUE); IltmmMediaInfo_get_SourceBitRate(pMediaInfo, &l); AddNumberToMsg("Source BitRate : ", (double)l, szMsg, FALSE); IltmmMediaInfo_get_SourceFormat(pMediaInfo, &l); AddNumberToMsg("Source format: ", (double)l, szMsg, FALSE); IltmmMediaInfo_get_SourceFormatName(pMediaInfo, &sString); AddStringToMsg("Source format name: ", sString, szMsg); SysFreeString(sString); IltmmMediaInfo_get_SourceFilterClassID(pMediaInfo, &sString); AddStringToMsg("Source filter CLSID: ", sString, szMsg); SysFreeString(sString); IltmmMediaInfo_get_SourceFilterName(pMediaInfo, &sString); AddStringToMsg("Source filter name: ", sString, szMsg); SysFreeString(sString); IltmmMediaInfo_get_Title(pMediaInfo, &sString); AddStringToMsg("Title: ", sString, szMsg); SysFreeString(sString); IltmmMediaInfo_get_Author(pMediaInfo, &sString); AddStringToMsg("Author: ", sString, szMsg); SysFreeString(sString); IltmmMediaInfo_get_Description(pMediaInfo, &sString); AddStringToMsg("Description: ", sString, szMsg); SysFreeString(sString); IltmmMediaInfo_get_Rating(pMediaInfo, &sString); AddStringToMsg("Rating: ", sString, szMsg); SysFreeString(sString); IltmmMediaInfo_get_Copyright(pMediaInfo, &sString); AddStringToMsg("Copyright: ", sString, szMsg); SysFreeString(sString); MessageBox(0, szMsg, "MediaInfo Sample: General...", 0); /* stream properties: */ for( lIndex=0; lIndex<lStreams; lIndex++ ) { memset(szMsg, 0, 8196); IltmmMediaInfo_put_CurrentStream(pMediaInfo, lIndex); IltmmMediaInfo_get_CurrentStream(pMediaInfo, &l); AddNumberToMsg("Stream number: ", (double)l, szMsg, FALSE); IltmmMediaInfo_get_StreamType(pMediaInfo, &sString); AddStringToMsg("Stream type: ", sString, szMsg); SysFreeString(sString); IltmmMediaInfo_get_StreamTypeName(pMediaInfo, &sString); AddStringToMsg("Stream type name: ", sString, szMsg); SysFreeString(sString); IltmmMediaInfo_get_StreamSubtype(pMediaInfo, &sString); AddStringToMsg("Stream subtype: ", sString, szMsg); SysFreeString(sString); IltmmMediaInfo_get_StreamSubtypeName(pMediaInfo, &sString); AddStringToMsg("Stream subtype name: ", sString, szMsg); SysFreeString(sString); IltmmMediaInfo_get_StreamDuration(pMediaInfo, &d); AddNumberToMsg("Stream duration: ", d, szMsg, TRUE); /* video specific */ strcat(szMsg, "\n"); strcat(szMsg, "\t*** Video specific properties ***\n"); IltmmMediaInfo_get_VideoFrameRate(pMediaInfo, &d); AddNumberToMsg("Video frame rate: ", d, szMsg, TRUE); IltmmMediaInfo_get_VideoWidth(pMediaInfo, &l); AddNumberToMsg("Video width: ", (double)l, szMsg, FALSE); IltmmMediaInfo_get_VideoHeight(pMediaInfo, &l); AddNumberToMsg("Video height: ", (double)l, szMsg, FALSE); IltmmMediaInfo_get_VideoBitCount(pMediaInfo, &l); AddNumberToMsg("Video bit count: ", (double)l, szMsg, FALSE); IltmmMediaInfo_get_VideoCompression(pMediaInfo, &l); AddNumberToMsg("Video compression: ", (double)l, szMsg, FALSE); IltmmMediaInfo_get_VideoBitRate(pMediaInfo, &l); AddNumberToMsg("Video bit rate: ", (double)l, szMsg, FALSE); IltmmMediaInfo_get_VideoFrames(pMediaInfo, &l); AddNumberToMsg("Video frames count: ", (double)l, szMsg, FALSE); /* Audio specific */ strcat(szMsg, "\n"); strcat(szMsg, "\t*** Audio specific properties ***\n"); IltmmMediaInfo_get_AudioFormatTag(pMediaInfo, &l); AddNumberToMsg("Audio format tag: ", (double)l, szMsg, FALSE); IltmmMediaInfo_get_AudioChannels(pMediaInfo, &l); AddNumberToMsg("Audio channels: ", (double)l, szMsg, FALSE); IltmmMediaInfo_get_AudioSamplesPerSec(pMediaInfo, &l); AddNumberToMsg("Audio frequency: ", (double)l, szMsg, FALSE); IltmmMediaInfo_get_AudioBitsPerSample(pMediaInfo, &l); AddNumberToMsg("Audio sample size: ", (double)l, szMsg, FALSE); IltmmMediaInfo_get_AudioAvgBytesPerSec(pMediaInfo, &l); AddNumberToMsg("Audio average bytes per second: ", (double)l, szMsg, FALSE); MessageBox(0, szMsg, "MediaInfo Sample: Streams...", 0); } IltmmMediaInfo_ResetSource(pMediaInfo); IltmmMediaInfo_Release(pMediaInfo); return 0; } void AddStringToMsg(char *pszTitle, BSTR sString, char *pszMsg) { strcat(pszMsg, pszTitle); if( sString ) strcat(pszMsg, OLE2T(sString)); else strcat(pszMsg, "NA"); strcat(pszMsg, " \n"); } void AddNumberToMsg(char *pszTitle, double dNumber, char *pszMsg, BOOL bFloat) { char szNumber[64]; if( bFloat ) sprintf(szNumber, "%f", dNumber); else sprintf(szNumber, "%.f", dNumber); strcat(pszMsg, pszTitle); strcat(pszMsg, szNumber); strcat(pszMsg, " \n"); }