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AVEncVideoHeaderDropFrame Property

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Microsoft DirectShow 9.0

AVEncVideoHeaderDropFrame Property

Specifies the value of drop-frame flag in the group of pictures (GOP) header.

Property GUID

CODECAPI_AVEncVideoHeaderDropFrame

Data Type

UINT32 (VT_UI4)

Possible Values

The value of this property can be 0 or 1.

Remarks

This property is read/write.

Drop-frame mode is used in NTSC video to correct the discrepancy between the video, which is 29.97 frames per second, and the time code display, which is 30 frames per second. In drop-frame mode, frame numbers 00 and 01 are skipped at the start of each minute, except for minutes that are even multiples of ten (00, 10, 20, and so forth). Only the frame numbers in the time code are dropped; no actual frames are dropped.

Requirements

Header: Include codecapi.h.

See Also