Chunked sampling built its chunks with an overlap for continuity and then
concatenated them whole, so the overlap was emitted twice. 97 frames at tile 72
overlap 16 gave 15 latent frames where the clip has 13: the output ran longer
than the input, and from the first seam on, frame i was no longer moment i.
Pasting back made it obvious rather than subtle -- crop_bboxes has one box per
source frame, so every frame after the seam went into a box belonging to a
different moment, and with crop_mode: zoomed into a box of a different size too.
That is the "crooked and out of sync" this was reported as.
Each chunk after the first now contributes only its tail, the part the previous
chunk did not already cover, so the concatenation is exactly the clip's latent
length. Single-chunk runs are untouched.
alisson-anjos
b5d08490b0