Video Converter: FAQ
From AVObjects Knowledge Base
(Difference between revisions)
| Line 9: | Line 9: | ||
Integer base algorithm. | Integer base algorithm. | ||
| − | '''How to use programmatically only those resize methods that I need?''' | + | ==='''How to use programmatically only those resize methods that I need?'''=== |
You can set them via via IVideoConverter2::SetConversionProps2(). | You can set them via via IVideoConverter2::SetConversionProps2(). | ||
| − | '''How do I use the Video Converter to downscale HD material to SD?''' | + | ==='''How do I use the Video Converter to downscale HD material to SD?'''=== |
For this purpose you need to specify the CONVERTER_PROPS2 structure: | For this purpose you need to specify the CONVERTER_PROPS2 structure: | ||
Revision as of 11:10, 11 February 2009
This is the FAQ page for the Video Converter DirectShow filter.
Contents |
What CPU extensions are used?
We use MMX, SSE and SSE2 extensions with auto detection of supported features.
What is precision used?
Integer base algorithm.
How to use programmatically only those resize methods that I need?
You can set them via via IVideoConverter2::SetConversionProps2().
How do I use the Video Converter to downscale HD material to SD?
For this purpose you need to specify the CONVERTER_PROPS2 structure:
CONVERTER_PROPS2 cnvProps2; ::ZeroMemory( &cnvProps2, sizeof(cnvProps2) ); cnvProps.eInterlaceIn = eVCI_Auto; // Or eVCI_Field1First, eVCI_Field2First, eVCI_Progressive for manual setting of interlace. cnvProps.nAspectIn = 0; // For use VideoInfoHeader2 flags or e.g. MAKELPARAM( 16, 9 ) for 16:9 AR. cnvProps.eInterlaceIn = eVCI_Auto; // Or eVCI_Field1First, eVCI_Field2First, eVCI_Progressive for manual setting of interlace. cnvProps.szOutput.cx = 720; cnvProps.szOutput.cy = 576; cnvProps.nAspectOut = MAKELPARAM( 4, 3 ); cnvProps.eKeepAspect2 = eVCKA_LetterBox; // Or eVCKA_Crop for crop or eVCKA_None for not maintain AR. cnvProps.eResize = eVCR_CubicWithMP; // See eVCResize for other interplation algorithms. cnvProps.eFieldProcess = eVCFP_Auto; // See eVCFieldProcess for other options. cnvProps.optimization = eThreadPerProc; // Or eOneThread - for work in 'sync' mode. cnvProps.dwUseCPUMask = -1; // Use all available cores/CPUs. int nMask = VC_ALL_MASK; cpVideConverter->SetConversionProps2( &cnvProps, &nMask );
