fabi/Sylpheed
1
0
Fork 0
Code Issues 9 Pull Requests Actions Packages Projects Releases Wiki Activity

re: the voice region s leading chunk is the movie s OWN dialogue, and a guard puts it there

Browse Source 
My own leading hypothesis -- that the leading chunk is an in-mission VOICE_D_*
line -- is refuted, on the route the port suggested: widen the enumeration past
the 95 manifest-bound movies and the byte-span test settles it without anyone
listening.

Scanning the stream for every trailer descriptor (the (id, 0x11) pair whose id
repeats at +0x800) gives the complete cue partition, mission lines included:
287 descriptors in a 116.2 MB window, all 287 carrying an id the 4280-name
registry names. Every one of the 17 leading spans is bracketed by
desc(N-1)..desc(N) where desc(N) is that movie s OWN cue id. Zero mission lines.

The mechanism is a guard in our own resolver. resolve_movie_voice_region takes
the predecessor trailer as the region start, guards it with
end - start < 1_500_000, and falls back to the .slb TOC anchor when that fails.
Cues with a true span over the guard: 17, of which 17 are stream-opening. Cues
under it: 78, of which 0. Perfect discrimination both ways. The anchor sits a
constant 504464 B after the true predecessor trailer on all 17, which is
unexplained.

Not established, and stated as such: this does NOT mean the export truncates N
seconds. The port s decode already has ADV s region at 359 s against a 137 s
movie, so it over-covers and the byte-to-time mapping is not linear. No XMA1
decoder in this container to check.

Also withdraws a claim this page had adopted from the port -- that chunks 1 and
2 are two stems of one performance. The port refuted its own claim by decoding:
S00A chunk 2 is digital silence, ADV chunk 2 is 0.60x chunk 1 with the residual
26.8 dB down. Equal duration was a shape match and Q10 s music census should not
have been carried across to voice on it.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QsEPXWVaEpyfudtR6re1Pd
This commit is contained in:
sylph-decoder
2026-08-29 15:03:58 +00:00
parent de2fe4a110
commit 432fb7450b
4 changed files with 361 additions and 39 deletions
Download Patch File Download Diff File Expand all files Collapse all files

50
docs/re/data/voice-stream-cue-map.txt Normal file
View File

@@ -0,0 +1,50 @@
registry: 4280 cue names, 4280 distinct ids
scanning dat/sound 421739888..537953648 (116.2 MB)
287 trailer descriptors found
of those, 287 carry an id the registry names, 0 do not
leading span -> owning cue
ADV lead 808304 B bracketed by desc@Some((433425776, 1528)) .. desc@Some((437044592, 1600)) owner VOICE_ADV [movie cue]
S00A lead 1324400 B bracketed by desc@Some((452294000, 1500)) .. desc@Some((455499120, 1501)) owner VOICE_S00A [movie cue]
S01A lead 1154416 B bracketed by desc@Some((455499120, 1501)) .. desc@Some((460117360, 1502)) owner VOICE_S01A [movie cue]
S02B lead 431472 B bracketed by desc@Some((461518192, 1503)) .. desc@Some((463838576, 1504)) owner VOICE_S02B [movie cue]
S02C lead 1869168 B bracketed by desc@Some((463838576, 1504)) .. desc@Some((469970288, 1506)) owner VOICE_S02C [movie cue]
S03A lead 253296 B bracketed by desc@Some((469970288, 1506)) .. desc@Some((472020336, 1507)) owner VOICE_S03A [movie cue]
S04B lead 556400 B bracketed by desc@Some((480003440, 1508)) .. desc@Some((482938224, 1509)) owner VOICE_S04B [movie cue]
S06A lead 351600 B bracketed by desc@Some((483433840, 1510)) .. desc@Some((485457264, 1511)) owner VOICE_S06A [movie cue]
S06B lead 607600 B bracketed by desc@Some((485457264, 1511)) .. desc@Some((488908144, 1512)) owner VOICE_S06B [movie cue]
S07A lead 505200 B bracketed by desc@Some((488908144, 1512)) .. desc@Some((491443568, 1513)) owner VOICE_S07A [movie cue]
S09B lead 177520 B bracketed by desc@Some((491634032, 1514)) .. desc@Some((493743472, 1515)) owner VOICE_S09B [movie cue]
S11C lead 742768 B bracketed by desc@Some((502173040, 1517)) .. desc@Some((505619824, 1518)) owner VOICE_S11C [movie cue]
S12C lead 1844592 B bracketed by desc@Some((506262896, 1520)) .. desc@Some((512406896, 1521)) owner VOICE_S12C [movie cue]
S13A lead 402800 B bracketed by desc@Some((512406896, 1521)) .. desc@Some((514874736, 1522)) owner VOICE_S13A [movie cue]
S14A lead 1817968 B bracketed by desc@Some((515278192, 1523)) .. desc@Some((521794928, 1524)) owner VOICE_S14A [movie cue]
S15A lead 255344 B bracketed by desc@Some((521794928, 1524)) .. desc@Some((524309872, 1525)) owner VOICE_S15A [movie cue]
S15C lead 931184 B bracketed by desc@Some((525626736, 1526)) .. desc@Some((529565040, 1527)) owner VOICE_S15C [movie cue]
verdicts: {"movie cue": 17}
cue span vs the 1.5 MB guard, and what the region actually starts at:
ADV true cue span 3618816 B (> guard: true) region starts at 433930240, true start 433425776 -> 504464 B of the cue's own audio is OUTSIDE the region
S00A true cue span 3205120 B (> guard: true) region starts at 452798464, true start 452294000 -> 504464 B of the cue's own audio is OUTSIDE the region
S01A true cue span 4618240 B (> guard: true) region starts at 456003584, true start 455499120 -> 504464 B of the cue's own audio is OUTSIDE the region
S02B true cue span 2320384 B (> guard: true) region starts at 462022656, true start 461518192 -> 504464 B of the cue's own audio is OUTSIDE the region
S02C true cue span 6131712 B (> guard: true) region starts at 464343040, true start 463838576 -> 504464 B of the cue's own audio is OUTSIDE the region
S03A true cue span 2050048 B (> guard: true) region starts at 470474752, true start 469970288 -> 504464 B of the cue's own audio is OUTSIDE the region
S04B true cue span 2934784 B (> guard: true) region starts at 480507904, true start 480003440 -> 504464 B of the cue's own audio is OUTSIDE the region
S06A true cue span 2023424 B (> guard: true) region starts at 483938304, true start 483433840 -> 504464 B of the cue's own audio is OUTSIDE the region
S06B true cue span 3450880 B (> guard: true) region starts at 485961728, true start 485457264 -> 504464 B of the cue's own audio is OUTSIDE the region
S07A true cue span 2535424 B (> guard: true) region starts at 489412608, true start 488908144 -> 504464 B of the cue's own audio is OUTSIDE the region
S09B true cue span 2109440 B (> guard: true) region starts at 492138496, true start 491634032 -> 504464 B of the cue's own audio is OUTSIDE the region
S11C true cue span 3446784 B (> guard: true) region starts at 502677504, true start 502173040 -> 504464 B of the cue's own audio is OUTSIDE the region
S12C true cue span 6144000 B (> guard: true) region starts at 506767360, true start 506262896 -> 504464 B of the cue's own audio is OUTSIDE the region
S13A true cue span 2467840 B (> guard: true) region starts at 512911360, true start 512406896 -> 504464 B of the cue's own audio is OUTSIDE the region
S14A true cue span 6516736 B (> guard: true) region starts at 515782656, true start 515278192 -> 504464 B of the cue's own audio is OUTSIDE the region
S15A true cue span 2514944 B (> guard: true) region starts at 522299392, true start 521794928 -> 504464 B of the cue's own audio is OUTSIDE the region
S15C true cue span 3938304 B (> guard: true) region starts at 526131200, true start 525626736 -> 504464 B of the cue's own audio is OUTSIDE the region
cues over the 1.5 MB guard: 17, of which stream-opening: 17
cues under the guard: 78, of which stream-opening: 0