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Telecine Pulldown Planner

Turn progressive source frames into an exact interlaced field cadence.

progressive source → interlaced field rate
1–10,000,000 whole frames

The cadence starts with source frame 1 on output field 1. Whole cycles avoid an unpaired final field and preserve running time.

First output frames

Field 1 and field 2 are sequence positions, not a top-field-first or bottom-field-first declaration. Complete cadence cycles preserve running time; a partial cycle can end early or late because its field repeats are incomplete. This planner maps cadence; it does not process video, retime audio or remove pulldown.