CTransformOutputPin.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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 *mtIn
);
Parameters
-
mtIn
-
Pointer to a CMediaType object that contains the proposed media type.
Return value
Returns an HRESULT value. Possible values include the following.
| Return code | Description |
|---|---|
|
Success. |
|
The filter's input pin is not connected. |
Remarks
This method implements the pure virtual CBasePin::CheckMediaType method. The method fails if the filter's input pin is not connected. Otherwise, it calls the filter's CTransformFilter::CheckTransform method, which is also pure virtual. The filter's derived class must implement CheckTransform, which determines if the proposed output media type is compatible with the input media type.
Requirements
| Requirement | Value |
|---|---|
| Header |
|
| Library |
|