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[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 UnblockOutputPin method unblocks the pin. When the pin is unblocked, it can deliver samples, change its output format, and reconnect itself.
Syntax
HRESULT UnblockOutputPin();
Parameters
This method has no parameters.
Return value
Returns one of the HRESULT values shown in the following table.
| Return code | Description |
|---|---|
|
Pin was already unblocked. |
|
Success. |
Requirements
| Requirement | Value |
|---|---|
| Header |
|
| Library |
|