Deinterlace Node

The Deinterlace node enables you to deinterlace video frames into frames of either odd or even fields, as you specify. You can also specify whether to fill in the missing field lines or to throw them away, as the following diagram illustrates:

For a comparison of the Interlace and Deinterlace nodes to the Split and Merge nodes, refer to the diagram at the beginning of this chapter.

Deinterlace Parameter Tab

Field

This parameter specifies whether you wish to extract the odd fields (lines 1, 3, 5, etc.) or the even fields (lines 2, 4, 6, etc.). If you choose "Odd," for example, the Deinterlace node will retain the odd field data. Use the popup menu to choose Odd or Even fields.

Other Field

This parameter enables you to specify how to treat the vacant spaces that remain once the Deinterlace node removes either the odd or even scanlines. Use the popup menu to select one of the four available options:

Use Black

This option fills the vacant lines with black.

Copy From Previous

This option fills the vacant lines with data replicated from each previous line.

Average Above and Below

This option fills the vacant lines with data obtained by averaging the preceding and subsequent lines together.

Throw Away

This option discards the data that formerly occupied the now-vacant lines. The Throw Away option has the effect of shrinking your file by 50% in the Y dimension. (In other words, an image that was originally 720 x 486 lines will become 720 x 243 lines.)




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