Video Content for Deinterlace and Frame-Rate Conversion
The driver receives a description of video content so that it can determine how it should deinterlace or frame-rate convert such content. The driver receives this video content as a pointer to a DXVA_VideoDesc structure in the following function calls:
The following examples indicate how the driver performs deinterlacing and frame-rate conversion on the received video content.
Deinterlacing 720 x 480i Content Example
The DXVA_VideoDesc structure is filled as follows to direct the driver to deinterlace 720 x 480i content that is sourced as two fields per sample at a frequency of 29.97 Hz.
| Member | Value |
|---|---|
SampleWidth |
720 |
SampleHeight |
480 |
SampleFormat |
DXVA_SampleFieldInterleavedOddFirst enumerator in DXVA_SampleFormat |
d3dFormat |
D3DFMT_YUY2 defined in the d3d8types.h and d3d9types.h header files |
InputSampleFreq.Numerator |
30000 (29.97-Hz monitor frequency) |
InputSampleFreq.Denominator |
1001 |
OutputFrameFreq.Numerator |
60000 (59.94-Hz monitor frequency) |
OutputFrameFreq.Denominator |
1001 |
Deinterlacing and Frame-Rate Conversion of 720 x 480i Content Example
The OutputFrameFreq member of the DXVA_VideoDesc structure is filled as follows to direct the driver to deinterlace and frame-rate convert 720 x 480i content.
| Member | Value |
|---|---|
OutputFrameFreq.Numerator |
85 (85-Hz monitor frequency) |
OutputFrameFreq.Denominator |
1 |
Deinterlacing a Single Field to a Progressive Frame Example
The OutputFrameFreq member of the DXVA_VideoDesc structure is filled as follows to direct the driver to deinterlace a single field to a progressive frame for later MPEG encoding.
| Member | Value |
|---|---|
OutputFrameFreq.Numerator |
30000 (29.97-Hz monitor frequency) |
OutputFrameFreq.Denominator |
1001 |
Frame-Rate Conversion of 480p Content Example
The DXVA_VideoDesc structure is filled as follows to direct the driver to perform frame-rate conversion on 480p content and to match the monitor display frequency.
| Member | Value |
|---|---|
SampleWidth |
720 |
SampleHeight |
480 |
SampleFormat |
DXVA_SampleProgressiveFrame enumerator in the DXVA_SampleFormat enumeration |
d3dFormat |
D3DFMT_YUY2 defined in the d3d8types.h and d3d9types.h header files |
InputSampleFreq.Numerator |
60 (60 Hz monitor frequency) |
InputSampleFreq.Denominator |
1 |
OutputFrameFreq.Numerator |
85 (85 Hz monitor frequency) |
OutputFrameFreq.Denominator |
1 |