Hendelser
19. nov., 23 - 21. nov., 23
Få det konkurransedyktige fortrinnet du trenger med kraftige ai- og skyløsninger ved å delta på Microsoft Ignite online.
Registrer deg nåDenne nettleseren støttes ikke lenger.
Oppgrader til Microsoft Edge for å dra nytte av de nyeste funksjonene, sikkerhetsoppdateringene og den nyeste tekniske støtten.
[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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.]
The pin property set returns the pin category for a pin on a filter. The category is set by the filter when it creates the pin; the category indicates what type of data the pin is delivered or receives by this pin.
Label | Value |
---|---|
Property Set GUID | AMPROPSETID_Pin |
Property ID | Description |
---|---|
AMPROPERTY_PIN_CATEGORY | Specifies the category of a pin. |
DirectShow defines the following pin categories in the Uuids.h header file.
Category GUID | Description |
---|---|
PIN_CATEGORY_ANALOGVIDEOIN | Input pin of the capture filter that takes analog and digitizes it. |
PIN_CATEGORY_CAPTURE | Capture pin. |
PIN_CATEGORY_CC | Pin providing closed captioning data from Line 21. |
PIN_CATEGORY_EDS | Pin providing Extended Data Services (Line 21, even fields). |
PIN_CATEGORY_NABTS | Pin providing North American Videotext Standard data. |
PIN_CATEGORY_PREVIEW | Preview pin. |
PIN_CATEGORY_STILL | Pin that provides a still image. The filter's capture pin must be connected before the still-image pin is connected. |
PIN_CATEGORY_TELETEXT | Pin providing teletext (a closed captioning variant). |
PIN_CATEGORY_TIMECODE | Pin providing timecode data. |
PIN_CATEGORY_VBI | Pin providing vertical blanking interval data. |
PIN_CATEGORY_VIDEOPORT | Video output pin to be connected to input pin zero on the Overlay Mixer. |
PIN_CATEGORY_VIDEOPORT_VBI | Pin to be connected to the VBI Surface Allocator, the VBI surface allocator filter that is needed to allocate the correct video memory for things like closed captioning overlays in scenarios where a video port is being used. PCI, IEEE 1394, and USB scenarios do not use this filter. |
PINNAME_VIDEO_CC_CAPTURE | Hardware slicing closed-captioning pin |
This property is read-only.
The following code shows how to check whether a pin supports this property set, and if so, how to obtain the pin category:
HRESULT GetPinCategory(IPin *pPin, GUID *pPinCategory)
{
IKsPropertySet *pKs = NULL;
HRESULT hr = pPin->QueryInterface(IID_PPV_ARGS(&pKs));
if (FAILED(hr))
{
return hr;
}
// Try to retrieve the pin category.
DWORD cbReturned = 0;
hr = pKs->Get(AMPROPSETID_Pin, AMPROPERTY_PIN_CATEGORY, NULL, 0,
pPinCategory, sizeof(GUID), &cbReturned);
// If this succeeded, pPinCategory now contains the category GUID.
SafeRelease(&pKs);
return hr;
}
Obs!
This example uses the SafeRelease function to release interface pointers.
Hendelser
19. nov., 23 - 21. nov., 23
Få det konkurransedyktige fortrinnet du trenger med kraftige ai- og skyløsninger ved å delta på Microsoft Ignite online.
Registrer deg nå