DV Video Decoder Filter
[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
This filter decodes a digital video (DV) stream into uncompressed video.
| Label | Value |
|---|---|
| Filter Interfaces | IBaseFilter, IDVRGB219, IIPDVDec, IPersistStream, ISpecifyPropertyPages |
| Input Pin Media Types |
|
| Input Pin Interfaces | IMemInputPin, IPin, IQualityControl |
| Output Pin Media Types | Major type: MEDIATYPE_VideoSubtypes:
Format_VideoInfo, Format_VideoInfo2 |
| Output Pin Interfaces | IMediaPosition, IMediaSeeking, IPin, IQualityControl |
| Filter CLSID | CLSID_DVVideoCodec |
| Property Page CLSID | CLSID_DVDecPropertiesPage |
| Executable | qdv.dll |
| Merit | MERIT_NORMAL |
| Filter Category | CLSID_LegacyAmFilterCategory |
Remarks
Use the IIPDVDec interface to set the decoding resolution to full, half size, quarter size, or one-eighth size.
Interlacing: Earlier versions of the decoder always deinterlace the video. As of DirectX 9.0, the DV Video Decoder can preserve the interlacing. This enables the interlaced video to be deinterlaced by the Video Mixing Renderer (VMR), for improved rendering quality. To use this feature, the downstream filter must support VIDEOINFOHEADER2 formats, indicated by that value Format_VideoInfo2 in the formattype member of the AM_MEDIA_TYPE structure. At full resolution output, the deinterlacing flags (dwInterlace) in the VIDEOINFOHEADER2 structure are set to AMINTERLACE_IsInterlaced | AMINTERLACE_DisplayModeBobOrWeave, indicating interlaced fields. At half resolution or lower, dwInterlace is set to zero, indicating progressive frames.