LEADTOOLS Multimedia API Help > Programming with LEADTOOLS Multimedia > C Code > Convert DVD with Subtitles for C |
This example shows how to convert only one chapter in a DVD title and how to enable DVD subtitles during conversion when you use the DVD Source object.
// This function will select one chapter in a certain title void SelectChapter(IltmmDVDTitle *pTitle, int nChapterIndex) { long nCount, i; IltmmDVDTitle_get_ChapterCount(pTitle, &nCount); for(i = 0; i < nCount; i++) { IltmmDVDChapter *pChapter; if(IltmmDVDTitle_GetChapter(pTitle, i, &pChapter) == S_OK) { IltmmDVDChapter_put_Selected(pChapter, i == nChapterIndex ? VARIANT_TRUE : VARIANT_FALSE); IltmmDVDChapter_Release(pChapter); } } } /* This function will select the main title for conversion. Within the main title, it will select only the second chapter. It will also select the first subtitle stream. */ void SelectOneChapterAndSubtitles(IltmmConvert *pConvert) { IUnknown *punk; IltmmDVDSource* pDVDSource; // Get the DVD source interface IltmmConvert_GetSubObject(pConvert, ltmmConvert_Object_SourceFilter, &punk); if (punk) { IUnknown_QueryInterface(punk, &IID_IltmmDVDSource, (void**)&pDVDSource); if (pDVDSource) { IltmmDVDTitle *pTitle; long lCount, i; long lVal; // Select the main title IltmmDVDSource_put_Selected(pDVDSource, ltmmDVDSource_Main_Selected); // We now need to select one chapter and enable subtitles for this title // For that, we will loop through the titles and find out which one was selected above // Get the title count in the disc IltmmDVDSource_get_TitleCount(pDVDSource, &lCount); for (i = 0; i < lCount; i++) { // Get the title interface IltmmDVDSource_GetTitle(pDVDSource, i, &pTitle); if (pTitle) { long bSelected; IltmmDVDTitle_get_Selected(pTitle, &bSelected); if(bSelected) { // we found the main title // (Optional step). We will convert only one chapter to speed up the conversion. // We will select the 2nd chapte, because the first chapter will sometimes have movie credits and little dialogue // Chapters are 0-based, so the second chapter has index 1 SelectChapter(pTitle, 1); // Get the subpicture stream count IltmmDVDTitle_get_SubpictureStreamCount(pTitle, &lVal); if(lVal > 0) // Select the first subpicture stream IltmmDVDTitle_put_SelectedSubpictureStream(pTitle, 0); } IltmmDVDTitle_Release(pTitle); } } IltmmDVDSource_Release(pDVDSource); } IUnknown_Release(punk); } } #define LEAD_MPEG2_ENCODER L"@device:sw:{33D9A760-90C8-11D0-BD43-00A0C911CE86}\\LEAD MPEG2 Encoder (3.0)" #define LEAD_MPEG_AUDIO_ENCODER L"@device:sw:{33D9A761-90C8-11D0-BD43-00A0C911CE86}\\LEAD MPEG Audio Encoder (2.0)" // select a certain encoder void SelectCompressor(IltmmCompressors *pCompressors, LPCWSTR pszCompressorName) { long index; BSTR bstrCompressorName = SysAllocString(pszCompressorName); IltmmCompressors_Find(pCompressors, bstrCompressorName, &index); IltmmCompressors_put_Selection(pCompressors, index); SysFreeString(bstrCompressorName); } // convert one chapter with subtitles (close captioning) HRESULT ConvertOneChapterWithSubtitles() { IltmmConvert *pConvert; IltmmCompressors *pCompressors; HRESULT hr = CoCreateInstance(&CLSID_ltmmConvert, NULL, CLSCTX_INPROC_SERVER, &IID_IltmmConvert, (void**) &pConvert); if(FAILED(hr)) return hr; // use the DVD source for greater control over the DVD conversion process IltmmConvert_put_UseDVDSource(pConvert, VARIANT_TRUE); // set the source, compressors and target format IltmmConvert_put_SourceFile(pConvert, L"e:\\video_ts\\video_ts.ifo"); IltmmConvert_put_TargetFormat(pConvert, ltmmConvert_TargetFormat_MPEG2_PROGRAM); // select mpeg2 encoder IltmmConvert_get_VideoCompressors(pConvert, &pCompressors); SelectCompressor(pCompressors, LEAD_MPEG2_ENCODER); IltmmCompressors_Release(pCompressors); // select mpeg audio encoder IltmmConvert_get_AudioCompressors(pConvert, &pCompressors); SelectCompressor(pCompressors, LEAD_MPEG_AUDIO_ENCODER); IltmmCompressors_Release(pCompressors); IltmmConvert_put_TargetFile(pConvert, L"c:\\i\\1.mpg"); // this function is the interesting part of the example SelectOneChapterAndSubtitles(pConvert); hr = IltmmConvert_StartConvert(pConvert); // wait for conversion to finish... Not very elegant, but we want to keep the example simple MessageBox(NULL, TEXT("Wait to finish"), TEXT("wait"), MB_OK); IltmmConvert_Release(pConvert); return hr; }