This method retrieves the average time difference between when the video frames should have been displayed and when they actually were. This method is the same as the IQualProp::get_AvgSyncOffset method except that the value returned is calculated as a standard deviation rather than as a simple average.

HRESULT get_DevSyncOffset(
  int* piDev


  • piDev
    [in] Pointer to the value denoting the accuracy of the video frames displayed.

Return Values

Returns an HRESULT value.


When playing video from networks, the presentation can often be disrupted by network glitches. For this reason, expressing the accuracy of video frames by a simple average is inappropriate. Looking at a standard deviation provides a better idea of the overall accuracy.


DirectShow applications and DirectShow filters have different include file and link library requirements. See Setting Up the Build Environment for more information.

OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.

See Also

IQualProp Interface

Last updated on Wednesday, April 13, 2005

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