Microsoft DirectX 9.0

IBasicVideo::get_AvgTimePerFrame

The get_AvgTimePerFrame method retrieves the average time between successive frames.

Syntax

HRESULT get_AvgTimePerFrame(
  REFTIME *pAvgTimePerFrame
);

Parameters

pAvgTimePerFrame

[out] Pointer to a variable of type REFTIME that receives the average frame time, in seconds.

Return Values

Returns an HRESULT value.

Remarks

This method returns the authored time per frame. This value is typically set by the source filter, which obtains it from information in the video stream itself. This value is not necessarily equal to the actual time per frame at which the video is rendered.

To retrieve the actual frame rate during playback, use the IQualProp::get_AvgFrameRate. For more information on actual versus authored frame rates, see the Remarks section for the VIDEOINFOHEADER structure.

See Also