happy
4c270b744f
Root causes found this session (all player-side, disc is valid -- bd_info validates it and mpv plays the ISO's feature directly): - Plain 'vlc <iso>' can't run ANY BD-J: system Java is 26, and libbluray's BD-J needs a JVM where System.setSecurityManager() works (<=21). run-vlc.sh pins mise Temurin 8, which is why it gets a menu at all. - The BD-J VFS-cache 'error creating /tmp/libbluray-bdj-cache' flood is libbluray's SecurityManager.canWrite() denying the cache root while an Xlet context is active. Fixed by pointing TMPDIR at LIBBLURAY_CACHE_ROOT (buda root), which canWrite() allows unconditionally. - Menu->playback failed with 'blurayReleaseVout: subpicture channel exists': VLC botches the background->playlist transition for an idle BD-J menu. Now the Xlet starts the feature immediately and draws the menu on top, so VLC stays in normal playing mode; MAIN FEATURE just hides the menu, any key brings it back, and the feature loops. Also: drop the redundant tools/vlc-plugins swap (system VLC already ships the bluray plugin), and add scripts/run-mpv.sh to play the feature with no BD-J/JVM at all. Vendored the SDK helloworld sample for reference. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
53 lines
1.9 KiB
Markdown
53 lines
1.9 KiB
Markdown
# Adjustments Blu-ray
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BD-J scaffold for the off-beat dark comedy `Adjustments`.
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## Tooling
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- `mise` pins Temurin JDK 8 for legacy BD-J bytecode.
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- `vendor/bdj-sdk` contains the BD-J Linux SDK pieces used for signing,
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template BD-J metadata, stubs, and UDF ISO generation.
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- `tools/tsmuxer/tsMuxeR` authors the generated elementary streams into a
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Blu-ray playlist, clipinfo, and `.m2ts`.
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- `tools/vlc-plugins` can hold project-local Arch VLC Blu-ray plugins when the
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system VLC package is split and `vlc-plugin-bluray` is not installed.
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- `ffmpeg` generates the temporary feature clip.
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- `vlc` opens the resulting ISO.
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## Commands
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```sh
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make bootstrap
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make
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make inspect
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make run
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```
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The ISO is written to:
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```text
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build/adjustments.iso
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```
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`make run` previews the disc by pointing VLC's Blu-ray access module at the
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`build/disc` BDMV **folder** (a real player reads the same tree from the ISO):
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```sh
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vlc --bluray-menu bluray:///absolute/path/to/build/disc
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```
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BD-J cache note: to load the menu Xlet, libbluray copies the disc's JAR and
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fonts into a VFS cache under `java.io.tmpdir` (default
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`/tmp/libbluray-bdj-cache`). Its BD-J `SecurityManager.canWrite()` allows writes
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under the buda/persistent roots unconditionally, but only allows the VFS cache
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root when no Xlet context is active on the calling thread -- and that extraction
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frequently runs while a context *is* active, so the write is denied and you see
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a flood of `error creating .../libbluray-bdj-cache` followed by the Xlet failing
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to load (no menu). `scripts/run-vlc.sh` fixes this by pointing `TMPDIR` at the
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same directory it gives libbluray as `LIBBLURAY_CACHE_ROOT` (the buda root), so
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the cache path is always writable. This is a libbluray/VLC runtime quirk, not a
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defect in the authored disc.
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The initial menu is a Java Xlet overlay with a few bonus-feature placeholders
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and a hidden menu stub. The actual generated video is a short ffmpeg SMPTE bars
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pattern with AC-3 audio, authored as playlist `00000`.
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