A project file can carry footage with a frame rate of den 0; frame_position
divided by zero while rendering it. Treat non-positive rates as having no
frame to land between.
Carry property, Font and Media Replacement overrides into the collapsed nested EvalCtx so nested layers render beyond the precomp frame instead of falling back to a clipped, flattened image. Key the layer cache on instance overrides to keep distinct collapsed instances isolated.
Resolve the Interpret Footage form against main's split into
interpret_footage_form and project_settings_form, keeping the Cineon
Settings fields and the pointUnits readback. Restore the Arc, rayon
prelude and cineon_frame imports that main's explicit use lists dropped.
jayzed80