Module frames 

Converts between VapourSynth’s strided plane buffers and the tightly packed rows core’s converters accept, plus the frame window core windowed algorithms request around each output frame.

Functions

pack_plane

Copies src, a plane with row stride stride bytes, into a new tightly packed buffer of width_bytes * height bytes.

unpack_plane_into

Writes a tightly packed plane, src, back into dst, a strided buffer with row stride stride bytes. The reverse of pack_plane.

window_indices

The behind + 1 + ahead source frame indices for the window around output frame n, behind older and ahead newer, clamped so nothing runs off either end of a clip whose last valid index is last_frame.