chore(release): prep 6.25.4 - a record loses its SEI at the door

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HX5zV3Fcf7Nzq4DYGdXvQE

Author: superuser404notfound

CHANGELOG.md

@@ -12,6 +12,30 @@ the public-API contract.
 
 _Nothing yet._
 
+## [6.25.4] - 2026-08-14
+
+([release notes](https://github.com/superuser404notfound/AetherEngine/releases/tag/6.25.4))
+
+### Fixed
+
+- A forwarded Annex-B config record no longer carries its prefix SEI into the `hvcC` the mp4
+  muxer builds (#365). When the record and the packets are both Annex B the record has to be
+  forwarded as it is, because movenc reads it to decide whether to convert the samples, and it
+  then builds the `hvcC` itself. `ff_isom_write_hvcc` collects five NAL types, not three (VPS,
+  SPS, PPS, SEI_PREFIX, SEI_SUFFIX), so a prefix SEI in a Matroska CodecPrivate becomes a fourth
+  array in the init sample description. That is the record Apple TV's HEVC track builder rejects
+  (AE#187: `asset.tracks count=0`, no format description), and the AE#187 defense cannot reach
+  this door: it guards on `configurationVersion == 1`, which an Annex-B buffer fails by
+  construction, and the muxer-built record never passes through the engine. The
+  non-parameter-set NALs are now dropped before the muxer runs and the record stays Annex B, so
+  the decision movenc makes about the samples is unchanged.
+
+### Changed
+
+- The `#365` forward branch logs what the config record is made of (`VPS×1 (28 B), SPS×1
+  (112 B), PPS×1 (10 B), SEI_PREFIX×1 (570 B)`) and what it dropped. A record's size alone does
+  not say whether the excess is a large SPS or an SEI, and only the latter reaches the `hvcC`.
+
 ## [6.25.3] - 2026-08-14
 
 ([release notes](https://github.com/superuser404notfound/AetherEngine/releases/tag/6.25.3))

Examples/README.md

@@ -17,7 +17,7 @@ Two complementary samples covering different audiences:
    ```
    https://github.com/superuser404notfound/AetherEngine
    ```
-   Dependency Rule: Up to Next Major Version, starting from `6.25.3`. Add the `AetherEngine` library product to your app target.
+   Dependency Rule: Up to Next Major Version, starting from `6.25.4`. Add the `AetherEngine` library product to your app target.
 
 3. **Drop the file in.** Replace the Xcode template's default `App.swift` (or whatever the generated `@main` file is called) with the contents of [`MinimalPlayerApp.swift`](MinimalPlayer/MinimalPlayerApp.swift). The file is self-contained: it defines both the `@main App` struct and the `ContentView`.
 

README.md

@@ -274,7 +274,7 @@ Subtitle cues land in raw source PTS; render the overlay against `player.sourceT
 Install via Swift Package Manager:
 
 ```swift
-.package(url: "https://github.com/superuser404notfound/AetherEngine", from: "6.25.3")
+.package(url: "https://github.com/superuser404notfound/AetherEngine", from: "6.25.4")
 ```
 
 Two complementary samples ship in `Examples/`:
@@ -458,10 +458,10 @@ Browse all of this as a searchable site at **[aetherengine.superuser404.de](http
 AetherEngine uses [Semantic Versioning](https://semver.org). The public API surface, every `public` declaration in `Sources/AetherEngine/`, is the stability contract. **Major** removes / renames public symbols or breaks adopters; **Minor** adds public API or codec / format support; **Patch** fixes bugs with no public API change. `internal` types are not part of the contract.
 
 ```swift
-.package(url: "https://github.com/superuser404notfound/AetherEngine", from: "6.25.3")
+.package(url: "https://github.com/superuser404notfound/AetherEngine", from: "6.25.4")
 ```
 
-Pin to `.upToNextMinor(from: "6.25.3")` for stricter teams that prefer to opt into minor bumps explicitly.
+Pin to `.upToNextMinor(from: "6.25.4")` for stricter teams that prefer to opt into minor bumps explicitly.
 
 ## Requirements