MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE_VIDCAP_MAX_BUFFERS attribute

Specifies the maximum number of frames that the video capture source will buffer.

Data type

UINT32

Get/set

To get this attribute, call IMFAttributes::GetUINT32.

To set this attribute, call IMFAttributes::SetUINT32.

Remarks

By default, the video capture source buffers a maximum of one frame at a time. You can increase the buffer limit by setting this attribute.

The correct way to set this attribute depends on the function used to create the media source:

• MFCreateDeviceSource: Set the attribute through the pAttributes parameter of the function.
• MFCreateDeviceSourceActivate: Set the attribute through the pAttributes parameter of the function.
• MFEnumDeviceSources: Set the attribute on the IMFActivate pointer returned by the function. Set the attribute before calling IMFActivate::ActivateObject.

The attribute applies only to video capture devices.

The GUID constant for this attribute is exported from mfuuid.lib.

Requirements

Requirement	Value
Minimum supported client	Windows 7 [desktop apps only]
Minimum supported server	Windows Server 2008 R2 [desktop apps only]
Header	Mfidl.h

See also

Alphabetical List of Media Foundation Attributes

Audio/Video Capture

Capture Device Attributes