MFSampleExtension_BottomFieldFirst attribute
Specifies the field dominance for an interlaced video frame. This attribute applies to media samples.
Data type
BOOL stored as UINT32
Get/set
To get this attribute, call IMFAttributes::GetUINT32.
To set this attribute, call IMFAttributes::SetUINT32.
Applies to
Remarks
If the video frame is interlaced and the sample contains two interleaved fields, this attribute indicates which field is displayed first. If TRUE, the bottom field is first in time. If FALSE, the top field is first.
If the frame is interlaced and the sample contains a single field, this attribute indicates which field the sample contains. If TRUE, the sample contains the bottom field. If FALSE, the sample contains the top field.
If the frame is progressive, this attribute describes how the fields should be ordered when the output is interlaced. If TRUE, the bottom field should be output first. If FALSE, the top field should be output first.
If this attribute not set, the media type describes the field dominance.
The GUID constant for this attribute is exported from mfuuid.lib.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client |
Windows Vista [desktop apps | UWP apps] |
| Minimum supported server |
Windows Server 2008 [desktop apps | UWP apps] |
| Header |
|
See also