Enables a media sink to receive samples before the presentation clock is started.
To get a pointer to this interface, call QueryInterface on the media sink.
The IMFMediaSinkPreroll interface has these methods.
|IMFMediaSinkPreroll::NotifyPreroll||Notifies the media sink that the presentation clock is about to start.|
Media sinks can implement this interface to support seamless playback and transitions. If a media sink exposes this interface, it can receive samples before the presentation clock starts. It can then pre-process the samples, so that rendering can begin immediately when the clock starts. Prerolling helps to avoid glitches during playback.
If a media sink supports preroll, the media sink's IMFMediaSink::GetCharacteristics method should return the MEDIASINK_CAN_PREROLL flag.
|Minimum supported client||Windows Vista [desktop apps | UWP apps]|
|Minimum supported server||Windows Server 2008 [desktop apps | UWP apps]|