FFmpeg 4.0.6
Since* 3.2
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The weave takes a field-based video input and join each two sequential fields into single frame, producing a new double height clip with half the frame rate and half the frame count.

The doubleweave works same as weave but without halving frame rate and frame count.

It accepts the following option:

first_field

Set first field. Available values are:

top, t

Set the frame as top-field-first.

bottom, b

Set the frame as bottom-field-first.

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Examples

  • Interlace video using select and separatefields filter:

    separatefields,select=eq(mod(n,4),0)+eq(mod(n,4),3),weave