The IQualProp interface provides methods for retrieving performance information from video renderers. The values returned through the interface are reset each time the filter is stopped. The Video Renderer filter and the Full Screen Renderer filter expose this interface.
Applications can use this interface to retrieve video performance information.
The IQualProp interface has these methods.
|IQualProp::get_AvgFrameRate||The get_AvgFrameRate method retrieves the actual average frame rate since streaming started.|
|IQualProp::get_AvgSyncOffset||The get_AvgSyncOffset method retrieves the average time difference between when the video frames should have been displayed and when they actually were.|
|IQualProp::get_DevSyncOffset||The get_DevSyncOffset method retrieves the average time difference between when the video frames should have been displayed and when they actually were.|
|IQualProp::get_FramesDrawn||The get_FramesDrawn method retrieves the number of frames actually drawn since streaming started.|
|IQualProp::get_FramesDroppedInRenderer||The get_FramesDroppedInRenderer method retrieves the number of frames dropped by the renderer.|
|IQualProp::get_Jitter||The get_Jitter method gets the jitter (variation in time) between successive frames delivered to the video renderer.|
|Minimum supported client||Windows 2000 Professional [desktop apps only]|
|Minimum supported server||Windows 2000 Server [desktop apps only]|
|Header||amvideo.h (include Dshow.h)|