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AVEncVideoHeaderDropFrame property

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

This property is read/write.

Data type


Property GUID


Property value

The value of this property can be 0 or 1.


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.


Minimum supported client

Windows 2000 Professional [desktop apps | UWP apps]

Minimum supported server

Windows 2000 Server [desktop apps | UWP apps]



See also

Codec API Properties
ICodecAPI Interface



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