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IMFMediaEngineEx::IsPlaybackRateSupported method (mfmediaengine.h)

  • Article

Queries whether the Media Engine can play at a specified playback rate.

Syntax

BOOL IsPlaybackRateSupported(
  [in] double rate
);

Parameters

[in] rate

The requested playback rate.

Return value

Returns TRUE if the playback rate is supported, or FALSE otherwise.

Remarks

Playback rates are expressed as a ratio of the current rate to the normal rate. For example, 1.0 is normal playback speed, 0.5 is half speed, and 2.0 is 2× speed. Positive values mean forward playback, and negative values mean reverse playback.

The results of this method can vary depending on the media resource that is currently loaded. Some media formats might support faster playback rates than others. Also, some formats might not support reverse play.

Requirements

Requirement Value
Minimum supported client Windows 8 [desktop apps | UWP apps]
Minimum supported server Windows Server 2012 [desktop apps | UWP apps]
Target Platform Windows
Header mfmediaengine.h

See also

IMFMediaEngineEx