CTransInPlaceOutputPin.CheckMediaType method
[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 CheckMediaType method determines if the pin accepts a specific media type.
Syntax
HRESULT CheckMediaType(
const CMediaType *pmt
);
Parameters
-
pmt
-
Pointer to a CMediaType object that contains the proposed media type.
Return value
Returns an HRESULT value. Possible values include those shown in the following table.
| Return code | Description |
|---|---|
|
Success. |
|
Media type not accepted. |
Remarks
This method overrides the CTransformOutputPin::CheckMediaType method.
If the filter is already streaming and is using two allocators, this method rejects any format changes. Otherwise, this method calls the filter's CTransformFilter::CheckInputType method to check the media type. If the input pin is connected, it also calls the IPin::QueryAccept method on the upstream output pin.
Requirements
| Requirement | Value |
|---|---|
| Header |
|
| Library |
|