dvd_placement_invariant_on_a_real_folder checks, per title set, the sum
ifo.rs relies on: file_start_lba(VTS_nn_0.IFO) + vtstt_vobs must land on
VTS_nn_1.VOB. It reports all 13 sets correct on a real DVD folder, which
is what excluded placement as the cause.
dump_titles_for_an_image prints every title a scan produces with the
numbers canonical_title_order sorts on. It is what showed the real shape:
the same disc scans to 38 titles as a CSS image and 10 once decrypted,
with identical capacity and a byte-complete image.
Both are #[ignore]d and read their target from the environment, so they
cost the gate nothing and are there for whoever picks the defect up.
Matthew Jackson
1f70398774