Merge remote-tracking branch 'upstream/main' into aep-import-lumetri

# Conflicts:
#	crates/aep/src/import/effects.rs

docs/aep-format.md

@@ -1,6 +1,6 @@
 # After Effects project format (`.aep`)
 
-> **Last reviewed:** 2026-11-05 · **Last updated:** 2026-11-05 · **Change:** versions: `svap` is the version that wrote the file, `head` bytes 4 to 7 the version it is written for, and what a Save a Copy As 25.x / 24.x of After Effects 2026 changes (section 1, "Versions"); before that: the stretch numerator is signed (a negative one reverses the layer, 981-983); layer styles (3.12b, 950-980); before that: footage: `sspc@118` of an image sequence is its folder's modification time (860, read-back x1-x3); before that: text: paragraph `/24`, `/35` and style `/68` are neutral for 0 and 1 (732-734, edited in place); before that: keyframes: the ease of mask path keys (599, 700), the spatial speed unit of fractional values (597, 598, 730); before that: text: character and paragraph settings, manual kerning, vertical text, `/nil` is neutral (S17: 538-578, 595, 596); before that: cameras, lights and 3D rotations (S16: the auto Position of a two-node camera is where After Effects renders it, 537; camera and light defaults read back 255, 256; Orientation `otst/otda` 488), Timewarp (529-533), an expression on an effect parameter (534); before that: text: style slot /13 is superscript / subscript (526-528; every scripted text of the corpus is superscript), wrapping box text 517; before that: effects of batch 5 (409-450, 511-516: integer sliders, checkbox defaults in `pard`, arbitrary data of Hue/Saturation and Levels, the parameters of Invert, Fast Box Blur, Gaussian Blur, Drop Shadow, Glow; section 3.7); before that: shape items of batch 5 (451-484, 519: ellipse, fill and stroke opacity, fill rule, group transform, shape layer anchor, trim paths, rectangle roundness, polystar fields, gradient default, nested groups, the defaults of every item; section 3.9); before that: track mattes: mode at `ldta` byte 107 and the matte layer id at byte 160 (cases 402-408, section 3.1); before that: text: automatic leading is verified (400); Exposure (`ADBE Exposure2`, cases 389-397): group start / end parameter types 13 / 14, float slider valid minimum and slider range (section 3.7); before that: text: U+0003 is a paragraph break (386, 387); before that: a stored text Anchor Point is pixels (385, now V); before that: the XML form `.aepx` is read into the same chunk tree (section 1, "The XML form"); the `head` save counter is a `u32` at byte 16; text documents for the importer (stroke colour, automatic leading, the font of each run, the undecoded-slot check, the text-layer Anchor Point, the Source Text record); before that: third round of verified field layouts (explicit-default semantics, type-major bezier ease, exact time stretch and in / out points, Time Remapping state, comp pixel aspect / shutter phase / display start, Point default, Layer Control None, dropdown selection, one `mkif` per mask, polystar and radial gradient records, text styles, camera and light options, marker cue data, audio and image-sequence footage) added to the typed view of `effectcraft-aep` · **Target:** Adobe After Effects 2026
+> **Last reviewed:** 2026-11-05 · **Last updated:** 2026-11-07 · **Change:** footage: an image sequence without a filename prefix stores only the suffix `Utf8`, and one imported with Force alphabetical order stores its file list in `LIST StVc` / `StVS` (section 3, footage); before that: versions: `svap` is the version that wrote the file, `head` bytes 4 to 7 the version it is written for, and what a Save a Copy As 25.x / 24.x of After Effects 2026 changes (section 1, "Versions"); before that: the stretch numerator is signed (a negative one reverses the layer, 981-983); layer styles (3.12b, 950-980); before that: footage: `sspc@118` of an image sequence is its folder's modification time (860, read-back x1-x3); before that: text: paragraph `/24`, `/35` and style `/68` are neutral for 0 and 1 (732-734, edited in place); before that: keyframes: the ease of mask path keys (599, 700), the spatial speed unit of fractional values (597, 598, 730); before that: text: character and paragraph settings, manual kerning, vertical text, `/nil` is neutral (S17: 538-578, 595, 596); before that: cameras, lights and 3D rotations (S16: the auto Position of a two-node camera is where After Effects renders it, 537; camera and light defaults read back 255, 256; Orientation `otst/otda` 488), Timewarp (529-533), an expression on an effect parameter (534); before that: text: style slot /13 is superscript / subscript (526-528; every scripted text of the corpus is superscript), wrapping box text 517; before that: effects of batch 5 (409-450, 511-516: integer sliders, checkbox defaults in `pard`, arbitrary data of Hue/Saturation and Levels, the parameters of Invert, Fast Box Blur, Gaussian Blur, Drop Shadow, Glow; section 3.7); before that: shape items of batch 5 (451-484, 519: ellipse, fill and stroke opacity, fill rule, group transform, shape layer anchor, trim paths, rectangle roundness, polystar fields, gradient default, nested groups, the defaults of every item; section 3.9); before that: track mattes: mode at `ldta` byte 107 and the matte layer id at byte 160 (cases 402-408, section 3.1); before that: text: automatic leading is verified (400); Exposure (`ADBE Exposure2`, cases 389-397): group start / end parameter types 13 / 14, float slider valid minimum and slider range (section 3.7); before that: text: U+0003 is a paragraph break (386, 387); before that: a stored text Anchor Point is pixels (385, now V); before that: the XML form `.aepx` is read into the same chunk tree (section 1, "The XML form"); the `head` save counter is a `u32` at byte 16; text documents for the importer (stroke colour, automatic leading, the font of each run, the undecoded-slot check, the text-layer Anchor Point, the Source Text record); before that: third round of verified field layouts (explicit-default semantics, type-major bezier ease, exact time stretch and in / out points, Time Remapping state, comp pixel aspect / shutter phase / display start, Point default, Layer Control None, dropdown selection, one `mkif` per mask, polystar and radial gradient records, text styles, camera and light options, marker cue data, audio and image-sequence footage) added to the typed view of `effectcraft-aep` · **Target:** Adobe After Effects 2026
 
 What `crates/aep` ([`effectcraft-aep`](../crates/aep/README.md)) reads and writes, and the evidence
 for each statement. Everything here was observed on project files we generated ourselves; no
@@ -279,7 +279,8 @@ Footage items beyond solids and stills (`Pin /sspc`, 222 bytes; audio and image
 | bits per pixel | 60 | u32 | RGBA still 32, RGB sequence 24, 0 for solids and audio | 126, 352 | V |
 | **sample rate** | 160 | f64 | 48 000.0 for the WAV; the same for an mp4 with sound (48 000.0 and 44 100.0 read back from AAC tracks of those rates), absent for an mp4 without (the importer takes a clip's audio from it) | 350, read-back vid-audio | V |
 | **file size** | 208 | u32 | bytes of the source file(s): png 149, WAV 96 044 (44 + 48 000 x 2), three png of 168 bytes 504 | 126, 350, 352 | V |
-| **sequence numbering** | 172, 176, 180 | u32 x 3 | first and last frame number and the digits of a sequence: 1, 3, 3 for `seq_001.png`..`seq_003.png` (353), 101, 103, 4 for `shot_0101.exr`..`shot_0103.exr` (603); 0 for single files (604, 605, 607). The name around the number is the pair of `Utf8` chunks between `Als2` and `opti` in `Pin ` (`seq_` / `.png`, `shot_` / `.exr`), absent on single files. `Item::sequence_info`, `SequenceInfo::file_name` | 353, 603, 604, 605, 607 | V |
+| **sequence numbering** | 172, 176, 180 | u32 x 3 | first and last frame number and the digits of a sequence: 1, 3, 3 for `seq_001.png`..`seq_003.png` (353), 101, 103, 4 for `shot_0101.exr`..`shot_0103.exr` (603); 0 for single files (604, 605, 607). The name around the number is the pair of `Utf8` chunks between `Als2` and `opti` in `Pin ` (`seq_` / `.png`, `shot_` / `.exr`), absent on single files. **An empty prefix is not written**: `0001.png`..`0005.png` leave one `Utf8` (`.png`) there, so a single `Utf8` is the prefix when the first file name in `opti` (byte 58: `0001.png`) starts with it and the suffix when it ends with it; without that evidence the reader takes one starting with `.` as the suffix and reads nothing else. `Item::sequence_info`, `SequenceInfo::file_name` | 353, 603, 604, 605, 607; the prefix-less sequence of issue 3174 (After Effects 25.2) | V |
+| **sequence file list** (Force alphabetical order) | `Pin /LIST StVc` | `StVS` (4 bytes, `u32` LE), then `Utf8` x count | a sequence imported with Force alphabetical order has, between `Als2` and `opti`, a `LIST StVc` instead of the prefix and suffix `Utf8`s: `StVS` holds the file count as a **little-endian** `u32` (`05 00 00 00`), followed by one `Utf8` per file name in order (`shot_0001.png`..`shot_0005.png`). The numbering at @172 / @176 is then `0xFFFFFFFF` and the digits @180 0; duration and rate are stored as for a numbered sequence (5/30, 30). The list replaces the numbering; a list without a readable `StVS` count, or with a name that is not a plain file name (`/`, `\`, `:`, a control character such as NUL, `.`, `..`), is not read. Without a stored item name the importer names the item after its first listed file (an assumption: what After Effects shows was not sampled). `SequenceInfo::files`, `SequenceInfo::nth_file_name` | the alphabetical sequence of issue 3174 (After Effects 25.2) | V |
 | **sequence folder time** | 118 | u32 (unaligned) | seconds since 1904-01-01 UTC: the modification time of a sequence's folder when After Effects scanned it (860: 0xe6fb443a = 2026-10-19 03:51:22, the folder's and its files' time). With the folder's time After Effects keeps the stored numbering on open; with another (an older time, the first or the last file's time while the folder's differs: x1, x2 against x3) it scans the folder again and warns about a gap in a modal dialog | 860, `export-tests\sparse860\exp` x1-x3 | V |
 | still duration denominator | 42 | u32 | 1 for png (126, 607), 600 for jpeg (605), 100 for OpenEXR (604): a still's duration is 0 over a per-format denominator | 126, 604, 605, 607 | V |
 
@@ -460,7 +461,7 @@ The expression engine is project-wide (`LIST ExEn/Utf8`, `javascript-1.0`). API:
 | **default** | `pard` | 56 | by type | float slider: f64 (Slider 0, **Blurriness 25**); fixed slider and angle: 16.16 (drop shadow opacity 127.5, direction 135, distance 5, softness 0; Fill opacity 1.0 = 100 %; **Tint Amount to Tint 100, Ramp Scatter 0, Blend With Original 0**); **colour: ARGB bytes (drop shadow `ff000000` black, Fill `ffff0000` red; Ramp Start `ff000000`, End `ffffffff`; Tint Map Black To `00000000` and Map White To `00ffffff`: alpha 0, which is what After Effects reads back)**; popup: u32 index (1); **point: two 16.16 fractions of the layer size at 56 and 60 (Point Control 0.5, 0.5; Ramp Start 0.5, 0 and End 0.5, 1)** | 071, 077, 080, 214, 215, 356, 368, 383 | V |
 | **valid maximum** | `pard` | 128 / 108 | 16.16 / f32 | the largest valid value of a fixed slider (128: Tint Amount 100, Ramp Scatter 512, Blend With Original **1.0**) and of a float slider (108: Blurriness 30 000; **Exposure 100, Offset 2, Gamma Correction 10**). The stored scale differs per slider (below), so this is the reader's only hint at it | 356, 368, 078, 389 | V |
 | **float slider valid minimum, slider range** | `pard` | 104; 112 / 116 | f32; f32 x 2 | the smallest valid value (Exposure -100, Offset -2, Gamma Correction 0.1 as f32) and the range the slider covers (Exposure -4..4, Offset -0.5..0.5, Gamma 0.1..10); the slider range is repeated as `tdum` / `tduM` (f64) in each value record (391-394). @120 holds the default again as f32 (Gamma 1.0, Blurriness 25), u16 @124 the display decimals (**H**: Exposure 2, Offset 4) | 389, 391-394 | V |
-| **definitions of a second instance** | top-level `LIST EfdG` | | | one `EfDf` per effect TYPE (`tdmn` = match name, then a copy of ONE instance's `sspc`, including that instance's value records); the `EfDC` count before them is a little-endian u32. When two layers carry the same effect type, only one instance keeps a full `parT`; **the other has an empty `LIST parT` (4 bytes)** but its own `tdgp` (input layer `-0000` with its own `tdpi`, the button record, and its value records). Its definitions come from the `EfdG` copy by match name, its values from its own records, never from the copy (383: the copy holds S100's Start [0.1, 0.2]; L's Ramp reads the 368 defaults). Which instance keeps the full `parT` is **?** (in 383 S100 is both first in the file and newest). The `EfDf` order follows the stack order (365 / 366); `Pefl/pjef` does not | 365, 366, 383 | V |
+| **definitions of a second instance** | top-level `LIST EfdG` | | | one `EfDf` per effect TYPE (`tdmn` = match name, then a copy of ONE instance's `sspc`, including that instance's value records); the `EfDC` count before them is a little-endian u32. When two layers carry the same effect type, only one instance keeps a full `parT`; **the other has an empty `LIST parT` (4 bytes)** but its own `tdgp` (input layer `-0000` with its own `tdpi`, the button record, and its value records). Its definitions come from the `EfdG` copy by match name, its values from its own records, never from the copy (383: the copy holds S100's Start [0.1, 0.2]; L's Ramp reads the 368 defaults). Which instance keeps the full `parT` is **?** (in 383 S100 is both first in the file and newest). The `EfDf` order follows the stack order (365 / 366); `Pefl/pjef` does not. **Some files have no `EfdG` at all** (seen in 17 projects, all from inside After Effects-made Motion Graphics templates). In each of them every effect type (196 in all; 2 to 14 Color Controls per file) has exactly one instance with a full `parT` and an empty one in every other instance, and the reader takes the others' definitions from that instance (`DefinitionSource::OtherInstance`, #3170). Which instance keeps it is **?** here too | 365, 366, 383; templates | V |
 | popup items | `parT/pdnm/Utf8` | | text | items separated by `\|` | 077 (`Item 1\|Item 2\|Item 3`), 214 | V |
 | stored value | `sspc/tdgp/<match>-NNNN` | | `tdbs` | present only for a parameter that differs from its default; `tdsb` 1, `cdat` as in 3.4. **Absent record = the `pard` default.** Some parameters are recorded in the default state (`tdsb` 3) and the record still holds the value After Effects uses: every one of the 25 such records in the corpus and the samples differs from its `pard` default and reads back as recorded (Lumetri Color's hidden controls High Dynamic Range, HDR Specular, the second Look, Legacy Tone And Saturation, Face Detection, Auto Color, Auto Intensity and SemanticAutoTone Progress, 1200; Cryptomatte's Selection Mode on, 1400). No effect record in the default state holds a value that does not count. The reader takes the value in either state (`EffectParam::recorded_value`, `EffectParam::value`); `EffectParam::stored_value` keeps to written records, and a record in any other state (no sample has one) is not read: the importer reports it as damaged data. That other effects record values so is H (no sample shows one) | see below; 1200, 1400 | V (1200, 1400), H (other effects) |