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MFPKEY_MediaSource_DisableReadAhead property

Enables or disables read-ahead in a media source.

Data typePROPVARIANT type (vt)PROPVARIANT member
VARIANT_BOOLVT_BOOLboolVal

Remarks

Applications can use this property to configure some media sources. To set the property, pass an IPropertyStore pointer to the source resolver. For more information, see Configuring a Media Source.

If the value is VARIANT_TRUE, the media source will not read ahead in the byte stream. This setting can optimize performance if you plan to read a limited amount of data from the media source—for example, to get a thumbnail image from a video file.

For typical audio/video playback, this property should be set to VARIANT_FALSE. The default value is VARIANT_FALSE.

Not every media source supports this property.

Requirements

Client

Windows 7

Header

Mfidl.h

See also

Media Foundation Properties

 

 

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