Captures materialized Strips in Head-to-Tail order, then pending Strips.
Copies the flat Projection and its ordered Footage spans into independent
arrays. Materialized Masks retain their soft-deleted content; released values
remain undefined. Pending inserts carry Footage, while unresolved Mask
commands do not yet own the content they address.
A trusted snapshot with snapshot-local links and packed Footage.
Remarks
Issues no SequencePoints and does not change the source Footage.
Array storage is copied; consumer-owned values are not deep-cloned. Both
transfer buffers are cleared after their contents have been consumed.
Captures materialized Strips in Head-to-Tail order, then pending Strips.
Copies the flat Projection and its ordered Footage spans into independent arrays. Materialized Masks retain their soft-deleted content; released values remain undefined. Pending inserts carry Footage, while unresolved Mask commands do not yet own the content they address.