Offset between the time stamp on each sample received by the sample grabber, and the time when the sample grabber presents the sample.
You can set this attribute on the IMFActivate object that is returned by the MFCreateSampleGrabberSinkActivate function. This attribute enables the sample grabber's callback function to receive samples earlier than the presentation time.
When the sample grabber receives a new sample, it presents the sample at time t − offset, where t is the time stamp on the sample and offset is the value of this attribute. If this attribute is not set, the default value is zero.
The GUID constant for this attribute is exported from mfuuid.lib.
Minimum supported client
|Windows Vista [desktop apps only]|
Minimum supported server
|Windows Server 2008 [desktop apps only]|
- Media Foundation Attributes